scholarly journals Influence of Storage Conditions on the Quality of Cotton Seeds in Benin Republic

2020 ◽  
Author(s):  
Roger IDOSSOU ◽  
Razack ABOUDOU
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Germination Rate ◽  
Storage Conditions ◽  
Germination Capacity ◽  
Sampling Sequence ◽  
Significant Difference ◽  
Cotton Seeds ◽  
Benin Republic

Abstract Background The availability of good quality seeds is synonymous with improved farming, especially cash crops such as cotton. However, serious problems with seed germination have been reported recently by cotton farmers in Benin Republic. The assumptions formulated at the base with regard to this situation remain to be verified technically. Thus, this study aims to evaluate the influence of storage conditions on the quality of cotton seeds in Northern Benin. Temperature and relative humidity were assessed followed by a seed sampling sequence in seven (07) cotton seeds stores according to three main periods, ranging from the establishment in conservation to the following seasonal production. Germination tests were then carried out on each sample followed by data analysis using R and Minitab17 software.Results There is a large variation in the germination rate of cotton seed during their storage period. The probabilities values ​​(Pvalue1 = 0.023, Pvalue2 = 0.001 and Pvalue3 = 0.038) respectively associated with the three samples and the various coefficient of variation (CV) between stores (CV1 = 2.42%, CV2 = 7.1% and CV3 = 8.88%) explain a significant difference not only between the stores but also from one sample to another with regard to sampling periods. There is a strong progressive decrease in seed germination (Germination rate 1 > Germination rate2 > Germination rate3), which is responsible for the failure observed by the growers during sowing. Thus, seeds lose an average of 15% of their initial germination capacity already at one month of storage. This is generally negative due to all the storage conditions and system in the stores.Conclusions The excessive increase in temperature and the considerable decrease in relative humidity in stores are the main factors of significant loss of germination capacity of cotton seeds. In view of this situation, it is desirable that technical measures be taken in this direction in order to better preserve the quality of the seeds made available to producers for an optimization of the cotton sector in Benin.

scholarly journals Sowing qualities of Hevea brasiliensis seeds

2017 ◽  
Author(s):  
В.Т. Нгуен ◽  
А.В. Жигунов
Keyword(s):  
Seed Germination ◽  
Hevea Brasiliensis ◽  
Germination Rate ◽  
Seed Mass ◽  
Germination Capacity ◽  
Biometric Parameters ◽  
Containerized Seedlings ◽  
Significant Difference ◽  
Root Collar

Для создания каучуконосных плантаций гевеи бразильской (Hevea brasiliensis Müll. Arg.) во Вьетнаме обычно используют однолетние саженцы с закрытой корневой системой, выращенные из сеянцев. Потребность в посадочном материале гевеи бразильской все возрастает, особенно если учесть, что применяются все более продуктивные сорта и клоны. Поэтому разработка методов оценки посевных качеств семян гевеи бразильской во всем мире очень востребова- на. Целью нашего исследования было определение влияния массы семян на их всхожесть и биометрические параметры сеянцев. Семена гевеи бразильской были собраны в августе 2015 г. во Вьетнаме на лесосеменной плантации 18–20-летнего возраста в провинции Донгнай. Поскольку для определения посевных качеств семян гевеи бразильской во Вьетнаме ГОСТ не разработан. авторы определяли всхожесть и энергию прорастания на торфяном субстрате в пластиковых кассетах, что позволило не только рекомендовать этот метод для определения посевных качеств семян, но и провести апробацию технологии выращивания контейнеризированных сеянцев. Как показали наблюдения, первые всходы гевеи бразильской появились на девятый день после посева семян. Всхожесть семян определяли на 20-й день после посева. Максимальная всхожесть семян достигает 58,0%. Минимальная составляет всего 16,4%. Всхожесть семян гевеи бразильской зависит от исходной массы семян. Семена с массой до 3,1 г имеют низкую всхожесть до 2,5%. Семена гевеи бразильской с массой более 4,5 г также имею низкую всхожесть до 1,4%. Лучшее показатели всхожести семян гевеи бразильской мы имеем во фракции средних по массе семян от 3,2 до 4,8 г. Всхожесть семян этой фракции может достигать 54%. Таким образом определение посевных качеств семян гевеи бразильской можно проводить методом проращивания семян в кассетах, заполненных питательным торфяным субстратом. Определение биометрических показателей сеянцев гевеи бразильской проводили на 55-й день после посева. Достоверной разницы по высоте и диаметру корневой шейки сеянцев, выращенных из семян различных групп по массе семян не обнаружено. Масса семян гевеи бра- зильской в основном определяет их всхожесть. В теплице летнего типа в ботани- ческом саду Санкт-Петербургского лесотехнического университета в кассетах Plantek-81, заполненных стандартным торфяным субстратом, сеянцы достигли высоты 21–25 см, диаметра корневой шейки 1,7–2,3 мм за 55 дней после посева. Поэтому способ выращивания контейнеризированных сеянцев гевеи бразильской может быть рекомендован и для условий Вьетнама. Plantations of Para rubber trees (Hevea brasiliensis Müll. Arg.) in Vietnam are usually established with one-year-old containerized transplants grown from seedlings. The need for planting material of Hevea brasiliensis is increasing, and so is the demand for more productive kinds of this species and clones. This being so, the development of methods for assessing the sowing quality of Hevea brasiliensis seeds is of significant importance in many countries. The purpose of our research was to determine the influence of the seed mass on their germination and the biometric parameters of seedlings. Seeds of Hevea brasiliensis were collected in August 2015 in Vietnam on an 18–20 year-old seed-growing plantation in the province of Dongnai. Since there is no standard for determining the sowing quality of Hevea brasiliensis seeds in Vietnam, we determined the germination capacity and energy on peat substrate in plastic cassettes, which allowed us not only to recommend the proposed method for determining the sowing quality of seeds, but also to test the technology of growing containerized seedlings. The observations have shown that the first shoots of Hevea brasiliensis appeared on the ninth day after sowing the seeds. Germination of seeds was determined on the 20th day after sowing. The maximum seed germination was 58.0%, whereas the minimum was only 16.4%. The germination capacity of Hevea brasiliensis seeds depends on the initial mass of the seeds. Seeds with mass below 3.1 g have a low germination rate of about 2.5%. Seeds with mass of more than 4.5 g also have a low germination rate of about 1.4%. The best germination of Hevea brasiliensis seeds was recorded in the fraction of medium-sized seeds from 3.2 to 4.5 g. The seed germination of this fraction can reach 54%. Thus, the sowing qualities of Hevea brasiliensis seeds can be determined by seed germination in cassettes filled with a nutrient peat substrate. The biometric parameters of the Hevea brasiliensis seedlings were determined on the 55th day after sowing. There was no significant difference in the height and diameter of the root collar of seedlings grown from seeds of different groups by the mass of the seeds. The mass of Hevea brasiliensis seeds mainly determines their germination. The seedlings that were grown in a summer greenhouse in the botanical garden of the St. Petersburg Forestry University in Plantek-81 cassettes filled with a standard peat substrate reached a height of 21–25 cm and the root collar diameter of 1.7–2.3 mm 55 days after sowing. The proposed method of growing containerized seedlings of Hevea brasiliensis can be recommended for the conditions of Vietnam as well.

Alleviation of dormancy in annual ryegrass (Lolium rigidum) seeds by hydration and after-ripening

Weed Science ◽  
2004 ◽  
Vol 52 (6) ◽  
pp. 968-975 ◽  
Author(s):  
Robert S. Gallagher ◽  
Kathryn J. Steadman ◽  
Andrew D. Crawford
Keyword(s):  
Seed Germination ◽  
Relative Humidity ◽  
Germination Rate ◽  
Dormancy Release ◽  
Annual Ryegrass ◽  
Dormant Seed ◽  
Lolium Rigidum ◽  
Time Model ◽  
Treatment Regimens ◽  
Two Populations

The effect of hydration (priming) treatment on dormancy release in annual ryegrass seeds from two populations was investigated. Hydration duration, number, and timing with respect to after-ripening were compared in an experiment involving 15 treatment regimens for 12 wk. Seeds were hydrated at 100% relative humidity for 0, 2, or 10 d at Weeks 1, 6, or 12 of after-ripening. Dormancy status was assessed after each hydration treatment by measuring seed germination at 12-hourly alternating 25/15 C (light/dark) periods using seeds directly from the hydration treatment and seeds subjected to 4 d postpriming desiccation. Seeds exposed to one or more hydration events during the 12 wk were less dormant than seeds that remained dry throughout after-ripening. The longer hydration of 10 d promoted greater dormancy loss than either a 2-d hydration or no hydration. For the seed lot that was most dormant at the start of the experiment, two or three rather than one hydration event or a hydration event earlier rather than later during after-ripening promoted greater dormancy release. These effects were not significant for the less-dormant seed lot. For both seed lots, the effect of a single hydration for 2 d at Week 1 or 6 of after-ripening was not manifested until the test at Week 12 of the experiment, suggesting that the hydration events alter the rate of dormancy release during subsequent after-ripening. A hydrothermal priming time model, usually used for modeling the effect of priming on germination rate of nondormant seeds, was successfully applied to dormancy release resulting from the hydration treatments.

scholarly journals Seed longevity of maize conserved under germplasm bank conditions for up to 60 years

2021 ◽  
Author(s):  
Filippo Guzzon ◽  
Maraeva Gianella ◽  
Jose Alejandro Velazquez Juarez ◽  
Cesar Sanchez Cano ◽  
Denise E Costich
Keyword(s):  
Seed Germination ◽  
Plant Genetic Resources ◽  
Seed Viability ◽  
Storage Conditions ◽  
Seed Longevity ◽  
Germplasm Bank ◽  
Significant Difference ◽  
Different Temperatures ◽  
Germination Experiments

Abstract Background and Aims The long-term conservation of seeds of plant genetic resources is of key importance for food security and preservation of agrobiodiversity. Nevertheless, there is scarce information available about seed longevity of many crops under germplasm bank conditions. Methods Through germination experiments as well as the analysis of historical monitoring data, we studied the decline in viability manifested by 1000 maize (Zea mays subsp. mays) seed accessions conserved for an average of 48 years at the CIMMYT germplasm bank, the largest maize seedbank in the world, under two cold storage conditions: an active (–3 °C; intended for seed distribution) and a base conservation chamber (–15 °C; for long-term conservation). Key Results Seed lots stored in the active chamber had a significantly lower and more variable seed germination, averaging 81.4 %, as compared with the seed lots conserved in the base chamber, averaging 92.1 %. The average seed viability detected in this study was higher in comparison with that found in other seed longevity studies on maize conserved under similar conditions. A significant difference was detected in seed germination and longevity estimates (e.g. p85 and p50) among accessions. Correlating seed longevity with seed traits and passport data, grain type showed the strongest correlation, with flint varieties being longer lived than floury and dent types. Conclusions The more rapid loss of seed viability detected in the active chamber suggests that the seed conservation approach, based on the storage of the same seed accessions in two chambers with different temperatures, might be counterproductive for overall long-term conservation and that base conditions should be applied in both. The significant differences detected in seed longevity among accessions underscores that different viability monitoring and regeneration intervals should be applied to groups of accessions showing different longevity profiles.

scholarly journals Occurrence of Fungi and Fungal Toxins in Fish Feed during Storage

Toxins ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 171
Author(s):  
Constanze Pietsch ◽  
Georg Müller ◽  
Sulayman Mourabit ◽  
Simon Carnal ◽  
Kasun Bandara
Keyword(s):  
Relative Humidity ◽  
Ochratoxin A ◽  
Short Duration ◽  
Storage Conditions ◽  
Fish Feed ◽  
Fungal Contamination ◽  
Commercial Fish ◽  
Fungal Toxins ◽  
Fish Feeds

Periods of unfavorable storing conditions can lead to changes in the quality of fish feeds, as well as the development of relevant mycotoxins. In the present study, a commercial fish feed was stored under defined conditions for four weeks. The main findings indicate that even storing fish feeds under unsuitable conditions for a short duration leads to a deterioration in quality. Mycotoxin and fungal contamination were subsequently analyzed. These investigations confirmed that different storage conditions can influence the presence of fungi and mycotoxins on fish feed. Notably, ochratoxin A (OTA) was found in samples after warm (25 °C) and humid (>60% relative humidity) treatment. This confirms the importance of this compound as a typical contaminant of fish feed and reveals how fast this mycotoxin can be formed in fish feed during storage.

scholarly journals QUALIDADE SANITÁRIA DE SEMENTES DE Caesalpinia ferrea: INCIDÊNCIA DE FUNGOS, CONTROLE E EFEITOS NA QUALIDADE FISIOLÓGICA COM O USO DE EXTRATOS VEGETAIS

FLORESTA ◽  
2014 ◽  
Vol 45 (1) ◽  
pp. 163 ◽  
Author(s):  
José George Ferreira Medeiros ◽  
Aderson Costa Araujo Neto ◽  
Edcarlos Camilo Silva ◽  
Min Fu Nascimento Huang ◽  
Luciana Cordeiro Nascimento
Keyword(s):  
Seed Germination ◽  
Aspergillus Flavus ◽  
Plant Extracts ◽  
Germination Rate ◽  
Antimicrobial Properties ◽  
Momordica Charantia ◽  
Alternative Control ◽  
Penicillium Sp ◽  
Physiological Quality

As sementes são eficientes meios de disseminação e transmissão de patógenos e, frequentemente, introduzem novos focos de infecção em áreas isentas. A utilização de extratos de plantas com propriedades antimicrobianas são alternativas ecológicas e promissoras para substituir a proteção promovida pela aplicação de fungicidas. Assim, objetivou-se avaliar o efeito dos extratos de alamanda (Allamanda blanchetti L.) e melão-de-são-caetano (Momordica charantia L.) sobre a micoflora e a germinação de sementes de Caesalpinia ferrea. Para tanto, utilizaram-se lotes de sementes coletados em diferentes municípios paraibanos (Areia, Bananeiras, Conde e Remígio), os quais foram submetidos aos testes de sanidade e de germinação. Os tratamentos fitossanitários consistiram de Testemunha; Fungicida dicarboximida (240 g.100 kg-1) e extratos A. blanchetti e M. charantia nas concentrações de 10, 100, 500 e 1000 ppm. Constataram-se os fungos Aspergillus flavus, A. niger, Cladosporium sp., R. stolonifer, Penicillium sp. e Nigrospora sp. nas sementes de C. ferrea. Os extratos de A. blanchetti e M. charantia nas concentrações de 500 e 1000 ppm reduziram a incidência de fungos. As maiores concentrações (500 e 1000 ppm) de ambos os extratos promoveram o aumento no percentual e na velocidade de germinação (IVG), bem como no comprimento das plântulas de C. ferrea.Palavras-chave: Patologia de sementes; micoflora; controle alternativo; germinação. AbstractSanitary quality of Caesalpinia ferrea seeds: incidence of fungi, control and effects on physiological quality with the use of plant extracts. Seeds are efficient to dissemination and transmission of pathogens and often introduce new foci of infection in exempted areas. The use of plant extracts with antimicrobial properties are promising and environmentally friendly alternatives to replace the protection promoted by the application of fungicides. We aimed to evaluate the effect of extracts of Allamanda blanchetti L. and Momordica charantia L. on the mycoflora and seed germination of Caesalpinia ferrea. We used lots of seeds collected in different cities of Paraiba (Areia, Bananeiras, Conde e Remígio), which were tested for germination and sanity. The phytosanitary treatments consisted of control, dicarboximide fungicide (240 g.100 Kg-1) and extracts of A. blanchetti and M. charantia at concentrations of 10, 100, 500 and 1000 ppm. We identified in the seeds of C. ferrea fungi Aspergillus flavus, A. niger, Cladosporium sp., R. stolonifer, Penicillium sp. and Nigrospora sp. The extracts of A. blanchetti and M. charantia in concentrations of 500 and 1000 ppm reduced the incidence of fungi. The highest concentrations (500 and 1000 ppm) of both extracts increased percentage and germination rate (IVG) and length of seedlings of C. ferrea.Keywords: Pathology seed; mycoflora; alternative control; germination.

scholarly journals GERMINATION OF STORED SEEDS OF FOUR TREE SPECIES FROM THE TROPICAL DRY FOREST OF MORELOS, MEXICO

2014 ◽  
Vol 92 (2) ◽  
pp. 281 ◽  
Author(s):  
Martha Cervantes ◽  
Eliane Ceccon ◽  
Consuelo Bonfil
Keyword(s):  
Seed Germination ◽  
Seed Size ◽  
Storage Time ◽  
Germination Rate ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Tropical Dry Forests ◽  
Germination Capacity ◽  
Dry Forests ◽  
And Storage

<p><span style="font-size: medium;"><span style="font-family: Times New Roman;">Studies on propagation of trees of Tropical Dry Forests are scarce in Mexico, besides, the provenance of seeds used in reforestation programs is generally unknown or poorly addressed. Knowledge on seed germination patterns of different provenances, and how they change through time, is useful to identify adequate sources of seeds and to develop seed collection and storage programs under the low-tech conditions prevailing in most rural nurseries. We evaluated seed size variation and germination of stored seeds from three different provenances per species in <em>Acacia bilimekii</em>, <em>Haematoxylum brasiletto</em>, <em>Lysiloma acapulcense</em>, and<em> L. divaricatum</em>.<em> </em>Seeds were collected in four sites in the Tropical Dry Forest of Morelos, Mexico, and were stored at room temperature; seed size was estimated through the volume of 75 seeds per provenance/species. Seed germination tests were made periodically from six to 24 months after storage and the effects of provenance and storage time on germination were analyzed using Anovas. There were significant differences in seed size among provenances in all species, while the effect of provenance on germination rate was significant in three of them. Germination rate changed with storage time among species and provenances. After 24 months, germination capacity was still ≥ 50% in all provenances of the two <em>Lysiloma</em> species, but in <em>A.</em> <em>bilimekii</em> there were large differences among provenances. Mean germination capacity was low in <em>H. brasiletto</em> after six months. More research on seed germination and storage of a larger set of species and provenances is needed to restore the Mexican tropical dry forests. </span></span></p>

scholarly journals DAYA KECAMBAH BENIH ROTAN JERNANG (Daemonorops draco Blume) DENGAN BERBAGAI PERLAKUAN PERENDAMAN DALAM AIR

2018 ◽  
Vol 5 (2) ◽  
pp. 120
Author(s):  
Emmy Winarni ◽  
Adistina Fitriani ◽  
Purnomo Purnomo ◽  
Sudin Panjaitan Panjaitan
Keyword(s):  
Seed Germination ◽  
Cold Water ◽  
Germination Rate ◽  
Water Immersion ◽  
Preliminary Treatment ◽  
Germination Capacity ◽  
Soaking Time ◽  
Dormancy Period ◽  
Good Germination

Good germination of rattan seed (DaemonoropsdracoBlume) will increase the germination rate, germination rate, and germination rate. However, to germinate undergoes any obstacles because the seed of jernangrattan has a period of dormancy. The immersion in cold water or at normal temperature (28o - 32o C) is one way that can be used to break the dormancy period of the seed. This study aims to determine the long immersion to the value of germination of rattan seed jernang (D. dracoBlume). This study used 3 treatments and 1 replication. The treatment in this research is soaking time without immersion (control), soaking for 24 hours, and 48 hours. The result research is that the long immersion has the effect on germination of rattan seed jernang (D. dracoBlume). The results showed that the best percentage of rattan seed germination (D.dracoBlume) got the preliminary treatment with water immersion for 24 hours with a percentage of 80%. The best seed germination rate is at 48 hours of water immersion treatment at 33.89% / day. The highest germination rate was found in seeds treated by water immersion for 48 hours with an average of 0.0122% / day.Keywords : germination capacity; rotan jernangPerkecambahan benih rotan jernang (Daemonorops draco Blume) yang baik akan meningkatkan daya kecambah, laju perkecambahan,dan nilai perkecambahan. Namun demikian untuk mengecambahkan masih terdapat kendala, karena benih rotan jernang memiliki masa dormansi. Perendam dalam air dingin atau pada suhu normal (28o - 32o C) merupakan salah satu cara yang dapat digunakan untuk mematahkan masa dormansi benih. Penelitian ini bertujuan untuk mengetahui lama perendaman terhadap nilai perkecambahan benih rotan jernang (D. draco Blume ). Penelitian menggunakan 3 perlakuan dan 1 ulangan. Perlakuan pada penelitian ini adalah waktu perendaman yaitu tanpa perendaman (kontrol), perendaman selama 24 jam, dan 48 jam. Hasil penelitian yang didapat adalah lama perendaman berpengaruh terhadap perkecambahan benih rotan jernang ( D. draco Blume ). Hasil penelitian menunjukkan bahwa persentase perkecambahan benih rotan jernan ( D.draco Blume ) yang terbaik yaitu yang diberikan perlakuan pendahuluan dengan perendaman air selama 24 jam dengan persentase sebesar 80%. Laju perkecambahan benih yang terbaik adalah pada perlakuan perendaman air selama 48 jam yaitu sebesar 33.89 %/hari. Nilai perkecambahan tertinggi terdapat pada benih yang diberikan perlakuan perendaman air selama 48 jam dengan rata – rata sebesar 0.0122 %/hari.Kata kunci : daya perkecambahan; rotan jernang

scholarly journals IMPACT OF FUNGICIDE TREATMENTS APPLIED TO WHEAT CROP (Triticum aestivum L.) ON SEED PATHOGENS

2021 ◽  
Vol 10 (19) ◽  
pp. 58-65
Author(s):  
Alexandra Loredana Suciu ◽  
Cătălin Perneș ◽  
Camelia Giurgiu ◽  
Ana-Maria Păcurar ◽  
Laura Șopterean ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Seed Germination ◽  
Germination Rate ◽  
Triticum Aestivum L ◽  
Wheat Crop ◽  
Health State ◽  
Wheat Cultivars ◽  
Alternaria Sp ◽  
Fusarium Sp

Effectiveness of fungicide treatments during vegetation is recognized as important conditioning factor for the health of wheat crops. Furthermore, quantity and quality of the harvested grain are fundamentally affected by the health state of the crop during vegetation. Aim of this research was to identify the influence exercised by a gradient of fungicide treatments applied to wheat crop on seed mycosis susceptibility after harvest. Seeds belonging to three wheat cultivars (‘Andrada’, ‘Codru’, ‘Exotic’) that received a number of 0-3 fungicide treatments with some commonly used commercial products during vegetation (Credo, Evolus, Acanto Plus), were screened for germination rate, Alternaria sp. and Fusarium sp. incidence. Overall seed germination frequency was 96%, Alternaria sp. frequency was 8.78% and Fusarium sp. frequency was 2.25%. Seeds from the crop that received three fungicide treatments during vegetation displayed 5.38% higher seed germination relative to control, decrease of Alternaria sp. frequency of 60.94% and decrease of Fusarium sp. frequency of 57.10% relative to control. Results suggest a decrease of seed mycotic load associated with increased number of fungicide treatments applied on the crop. Optimization of fungicide application might be possible by studying the influence of phenophase on the effectiveness of the treatments, and these aspects shall receive more attention in the future.

scholarly journals Study of Seed Germination by Soaking Methode of Cacao (Theobroma cacao L.)

2014 ◽  
Vol 30 (3) ◽  
pp. 190-197
Author(s):  
Sulistyani Pancaningtyas ◽  
Teguh Iman Santoso ◽  
Sudarsianto .
Keyword(s):  
Seed Germination ◽  
Theobroma Cacao ◽  
Germination Rate ◽  
Seed Viability ◽  
Random Design ◽  
Experimental Station ◽  
Low Costs ◽  
Theobroma Cacao L ◽  
Cocoa Seedlings

Study of germination methods conduct to get information about seed viability based on germination rate, percentage of germination and vigority. Germination methods was studied to get the efficiency and effectivity of germination, easy to handle, low costs with high vigority. Sand and gunny sack methods  for germination, need extensive place  and 3-4 days germination period after planting. This research will study the alternative of germination method with soaking. This method can be accelerating  germination rate and effectively place usage without decreasing the quality of cacao seedling.The research was done at Kaliwining Experimental Station, Indonesian Coffee and Cocoa Research Institue. This research consist of two experiment was arranged based on factorial completely random design. First experiment will observed to compared germination rate and the second experiment will observed seedling quality between soaking and wet gunny sack germination method.The results showed that length of radicel on soaking method longer than wet gunny sack method. Growth of radicel started from 2 hours after soaking, moreover length of radicel at 4 hours after soaking have significant different value with gunny sack method. On 24 hours after soaking have 3,69 mm and 0,681 mm on wet gunny sack treatment. Except lengt of hipocotyl, there is not different condition between seedling that out came  from soaking and wet gunny sack method. Length of hipocotyl on 36 hours after soaking have 9,15 cm and significant different between wet gunny sack germination method that have 5,40 cm. Keywords : seed germination, soaking method, Theobroma cacao L., cocoa seedlings

scholarly journals The Effect of Invigoration Using Polyethylene Glycol And Ultra Fine Bubble on Improving of Sengon Seeds (Falcataria Moluccana Miq.) Quality After Two Years Storage

Jurnal Wasian ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 133-143
Author(s):  
Iskandar Siregar ◽  
◽  
Riki Ramdhani ◽  
Evayusvita Rustam ◽  
Dede Sudrajat ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Seed Germination ◽  
Germination Rate ◽  
Seed Viability ◽  
Germination Capacity ◽  
Peg 6000 ◽  
Vigor Index ◽  
Fine Bubble ◽  
Initial Seed ◽  
Environmental Air

Utilization of seeds storage results in decreased plant productivity. The increase can be used by treating seeds before planting through the technique of invigoration. This purpose of the study is to assess the effectiveness of invigoration methods using polyethylene glycol (PEG 6000) and ultrafine bubbles (UFB) to improve viability and vigor of sengon seeds (Falcataria moluccana). Seed agieng using 96 % ethanol was carried out to obtain the diversity of seedlot viability as the materials for testing the effectiveness of invigoration treatments. A complete random design was used to test the effectiveness of 5 invigoration treatments, i.e., seed without invigoration treatment, soaking in PEG 6000 -0.8 Mpa, soaking in PEG 6000 -1.2 Mpa, soaking in UFB water injected by environmental air, and soaking in UFB water injected by oxygen 99 %, with soaking time is 24 hours for each treatment. Seed agieng resulted three classes of seed viability, i.e. 62 % (initial seed), 83 % (seed agieng for 30 minutes) and 57 % (seed agieng for 60 minutes). In the condition of seed germination before treatment (DBA) 57 % and DBA 62%, invigoration treatments were significantly affected on seed germination capacity, but not significantly different in DBA 83 %. The soaking treatment of UFB injected by oxigen 99 % was able to improve the germination parameters (germination capacity, germination rate, and vigor index) on the sengon seeds with DBA 57 %. For seeds with DBA 62 %, the soaking treatment in UFB injected by environmental air was provided the best germination capacity, T50, and vigor index. The treatment of UFB injected by oxygen 99 % was more effective to improve the seed with very low viability and vigor (DBA 57 %). In general, improving of seed viability and vigor is more effective by using UFB than PEG 6000.

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