Effect of light quality on Tabebuia rosea seed germination

Tabebuia rosea germination capacity and rate have been examined under light and dark conditions. However, seeds responses to light quality, in particular to short and mid-wavelengths, are not well known. We hypothesized that short wavelengths would have a positive effect on rosea germination. The effects of short, mid and long-wavelengths on germination capacity, rate (germination rate index, germination rate R50, a devised index of germination rate R50´ and peak value), mean daily germination and germination value were evaluated. Light quality had little effect on germination capacity; it was reduced only in darkness. Seeds under short and mid-wavelengths germinated faster (germination rate) than under any other light treatments. We concluded that althoughlt T. rosea seeds respond to all light quality treatments, the short and mid-wavelengths are the cue for increasing germination speed. For synchronizing germination, short and mid-wavelengths transmitted by red cellophane paper can be used as a pre-germinative treatment for restoration and silvicultural purposes.

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Effect of light and temperature on germination of Costus arabicus L., seeds an tropical ornamental species

Ornamental Horticulture ◽

10.14295/oh.v22i3.916 ◽

2016 ◽

Vol 22 (3) ◽

pp. 259

Author(s):

Armando Reis Tavares ◽

Nara Oshiro Santos ◽

Shoey Kanashiro ◽

Vanessa Rebouças do Santos

Keyword(s):

Seed Germination ◽

Germination Rate ◽

Germination Percentage ◽

Stem Cutting ◽

Tropical Species ◽

Temperature Conditions ◽

Germination Speed ◽

Ornamental Species ◽

Effect Of Light

Costus arabicus L. (Costaceae) is a tropical species native from Brazil. The species has ornamental potential as garden and vase plant, and for flower and stem cutting. The aim of this study was to evaluate the seed germination of C. arabicus under different of light and temperature conditions. Seeds subjected to constant temperatures of 20, 25 and 30 °C under photoperiod of 12 h of light or dark. The parameters analyzed were percentage of germination and germination speed index (GSI). The highest germination percentage (70%) was under temperature of 30 °C, both in light or dark. The GSI showed that the germination rate increases as temperature increases, mainly on 30 °C. C. arabicus seeds germinated in the presence or absence of light, thus was considered neutral photoblastic and germination on light under 30 °C was more efficient for seed germination.

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Effect of Seed Treatments and Potting Medium on Seed Germination and Associate Parameters in Critically Endangered Litsea glutinosa (Lour.)

Indian Journal of Forestry ◽

10.54207/bsmps1000-2016-ckucs8 ◽

2016 ◽

Vol 39 (2) ◽

pp. 111-115

Author(s):

Naseer Mohammad ◽

Ankur Dahayat ◽

Yogeshwar Mishra

Keyword(s):

Seed Germination ◽

Seed Treatment ◽

Germination Percentage ◽

Percentage Germination ◽

Germination Energy ◽

Soil Media ◽

Litsea Glutinosa ◽

Germination Value ◽

Positive Effect ◽

Peak Value

An experiment was conducted to investigate the effect of different seed treatment and soil media on germination percentage and associate parameters in Litsea glutinosa during May to June, 2013 at vegetative multiplication nursery of Genetics and Plant Propagation Division of Tropical Forest Research Institute, Jabalpur (Madhya Pradesh). Data on daily seed germination from twenty treatment combination was recorded and used for estimation of germination percentage, germination energy (%), energy period, germination value and peak value of mean germination. Critical perusal of analysis revealed that seed treatment with ‘Water+200 ppm GA3’ was resulted in positive effect on all the characters studied i.e. germination percentage, germination energy, energy period, germination value and peak value of mean germination. Whereas, potting mixture of ‘1/3 Sand+1/3 FYM+1/3 Soil’ revealed positive effect on all the characters studied among all the potting mixture tried.

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Assessing Salicornia europaea Tolerance to Salinity at Seed Germination Stage

Agriculture ◽

10.3390/agriculture10020029 ◽

2020 ◽

Vol 10 (2) ◽

pp. 29

Author(s):

Roberta Calone ◽

Rabab Sanoubar ◽

Enrico Noli ◽

Lorenzo Barbanti

Keyword(s):

Salt Tolerance ◽

Seed Germination ◽

Germination Rate ◽

Principal Component ◽

Germination Percentage ◽

Salicornia Europaea ◽

Salinity Levels ◽

Mean Germination Time ◽

Germination Value ◽

Peak Value

Salicornia europaea, a halophytic species, was investigated to assess its ability to withstand salinity during seed germination, and to identify suitable indices to interpret salt tolerance at this delicate stage. Seed germination indices (germination percentage (GP), germination energy (GE), germination value (GV), coefficient of germination velocity (CVG), germination rate index (GRI), germination peak value (GPV), mean germination time (MGT), and time to 50% germination (T50)) were calculated under increasing salinity (0, 100, 200, 300, 400, and 600 mM NaCl). Principal component analysis (PCA) was used to describe the relationships involving the variables that account for data variance. Two salinity thresholds were identified (100 and 600 mM NaCl) determining significant decreases in all the indices, except for T50 and MGT. In fact, PCA based on generated correlation circle showed significant negative correlations (r close to −1) between salt stress and GP, GE, GRI, PV, GV, and CVG, whereas no correlation was observed with T50 and MGT (r close to zero). Based on this, GP, GE, GRI, PV, GV, and CVG can be considered useful traits to assess salt tolerance during germination in S. europaea, while T50 and MGT, that were not affected by the range of salinity levels investigated, should not be used for this purpose.

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Chitosan coating on bean and maize seeds: release of agrochemical fungicide and post-storage condition

Journal of Seed Science ◽

10.1590/2317-1545v43254286 ◽

2021 ◽

Vol 43 ◽

Author(s):

Nancy Araceli Godínez-Garrido ◽

Juan Gabriel Ramírez-Pimentel ◽

Jorge Covarrubias-Prieto ◽

Francisco Cervantes-Ortiz ◽

Artemio Pérez-López ◽

...

Keyword(s):

Seed Germination ◽

Defense Mechanisms ◽

Germination Rate ◽

Storage Condition ◽

Germination Percentage ◽

Negative Effects ◽

Retention Capacity ◽

Chitosan Coating ◽

Maize Seeds ◽

Germination Speed

Abstract: Chitosan is a biopolymer obtained from deacetylation of chitin; it has multiple applications in agriculture as an antifungal, soil conditioner, inducer of defense mechanisms, fruits postharvest coating, leaves and seeds, among others. The objective in this research was to evaluate the effect of chitosan coatings mixed with fungicide (dithiocarbamate) on the germination and germination speed of bean and maize seeds in storage and to determine the retention capacity of the fungicide in the coated seeds under different times of imbibition. Two coating treatments at concentrations of 0.1 and 0.5% chitosan in water, two coatings treatments at 0.1 and 0.5% chitosan supplemented with 0.5% fungicide and a coating without chitosan using only 0.5% fungicide in water were used in bean and maize seed; and as control seeds imbibed in distilled water were used; after treatments, germination percentage and germination speed were determined, also fungicide release were determined at 0, 1, 2 and 6 h of imbibition, and the effect of storage time on germination and germination speed was determined at 30, 60, 90, 120, 150 and 180 days of storage at 4 °C and 45% relative humidity. The fungicide release effect was determined by inhibiting Fusarium oxysporum conidia germination. There were no negative effects of coatings on seed germination after storage. The treatment that provided both greater retention of the fungicidal agent and released it gradually, was 0.5% chitosan mixed with fungicide concentration. Chitosan coating seeds mixed with fungicide do not cause negative changes in seed germination or germination rate.

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Effect of light, salinity, and temperature on seed germination of Limonium stocksii

Canadian Journal of Botany ◽

10.1139/b03-118 ◽

2004 ◽

Vol 82 (2) ◽

pp. 151-157 ◽

Cited By ~ 79

Author(s):

Sabahat Zia ◽

M Ajmal Khan

Keyword(s):

Seed Germination ◽

Temperature Regime ◽

Germination Rate ◽

Gradual Decrease ◽

Salinity Treatment ◽

Optimal Temperature ◽

Complete Darkness ◽

Temperature Regimes ◽

Effect Of Light ◽

Recovery Temperature

Limonium stocksii (Boiss.) Kuntze (Plumbaginaceae) is a perennial, woody shrub distributed at Hawks Bay, Karachi, Pakistan. Experiments were carried out to investigate seed germination responses of L. stocksii at different salinities (0, 100, 200, 300, 400, and 500 mmol/L NaCl) and under different temperature regimes (10:20, 15:25, 20:30, and 25:35 °C), both in a 12 h dark : 12 h light photoperiod and in complete darkness. The highest percentage of germination (about 100%) was obtained at 0, 100, and 200 mmol/L NaCl at 20:30 °C, and a further increase in salinity resulted in a gradual decrease in germination. Less than 5% of seeds germinated at 500 mmol/L NaCl. Germination under salinity treatment at 15:25 °C was slightly more inhibitory than the optimal temperature regime, whereas under both 10:20 and 25:35 °C temperature regimes, seed germination was substantially reduced and few seeds germinated at concentrations higher than 200 mmol/L NaCl. Germination rate was fastest at 20:30 °C and slowest at 10:20 °C. Relatively low seed germination was obtained in the dark in comparison to seeds germinated in a 12-h photoperiod under saline conditions. Recovery experiments showed that exposure of seeds to various salinity and temperature regimes had little effect on viability of seeds.Key words: germination, light, Limonium stocksii, NaCl, recovery, temperature.

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

Botanical Sciences ◽

10.17129/botsci.96 ◽

2014 ◽

Vol 92 (2) ◽

pp. 281 ◽

Cited By ~ 3

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

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 Acacia bilimekii, Haematoxylum brasiletto, Lysiloma acapulcense, and L. divaricatum. 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 Lysiloma species, but in A. bilimekii there were large differences among provenances. Mean germination capacity was low in H. brasiletto 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.

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

Jurnal Hutan Tropis ◽

10.20527/jht.v5i2.4365 ◽

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

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SEED GERMINATION OF GUNDELIA TOURNEFORTII L. UNDER DIFFERENT DORMANCY BREAKING TREATMENTS

PLANT ARCHIVES ◽

10.51470/plantarchives.2021.v21.no1.141 ◽

2021 ◽

Vol 21 (No 1) ◽

Author(s):

Vian Dler Ali ◽

Farhad Hassan Aziz

Keyword(s):

Seed Germination ◽

Tap Water ◽

Petri Dish ◽

Dry Weight ◽

Germination Percentage ◽

Dormancy Breaking ◽

Mean Germination Time ◽

Breaking Seed Dormancy ◽

Germination Value ◽

Peak Value

Gundelia tournefortii L. is adapted to mountains area climate, and the germination of this plant is not easily. This research conducted to study the effect of different seed treatments in various treatment durations in two experiments in petri dish in the laboratory and in seedling tray in the lath house to breaking seed dormancy and germination stimulus. Results indicated that there is significant enhancement of germination by all treatments and the maximum germination percentage was obtained by seed freezing 99.17% in the laboratory and 93.33% in the lath house for all treatment durations 12, 14, 48 and 72 hours. The other parameters of seed germination like germination speed, peak value, mean daily germination, mean germination time, germination value, radicle length, radicle elongation velocity, plumule length, plumule elongation velocity, seedling fresh and dry weight escalated by seed freezing and seed soaking in tap water at all soaking durations 12, 24, 48 and 72 hours. Gundelia tournefortii L. germinated seed was an anatomically examined by paraffin method and calculated diploid number of chromosomes 2n=2x=18 by aceto-carmine squash methods

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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 ◽

10.20886/jwas.v8i2.5997 ◽

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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Suggestions on increasing the germination seeds of pasture fodder plants

E3S Web of Conferences ◽

10.1051/e3sconf/202126404033 ◽

2021 ◽

Vol 264 ◽

pp. 04033

Author(s):

Bakhadir Mirzaev ◽

Farmon Mamatov ◽

Bakhtiyor Tulaganov ◽

Amir Sadirov ◽

Rustam Khudayqulov ◽

...

Keyword(s):

Seed Germination ◽

Seed Production ◽

Germination Rate ◽

Mechanical Damage ◽

Forage Plants ◽

Fodder Plants ◽

Forest Belts ◽

Seed Crops ◽

And Storage ◽

Positive Effect

One of the problems in the seed production of pasture forage plants is low seed germination. Existing pasture improvement technologies and technical means for seed production, harvesting, post-harvest handling, and storage of pasture forage plants are analysed. Suggestions for improving seed germination have been developed: it is advisable to place the seed crops between the forest belts; to improve seed germination, it is necessary to make a preliminary harvest of seed crops with spreading the mass on the stubble; the mechanised collection of seed heaps using a rotary mower with an active heap separator increases the germination rate by reducing mechanical damage to the seeds and enriching the soil with organic matter; the seed sowing process has a positive effect on the germination rate of the seed produced, in addition to reducing cleaning costs.

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