scholarly journals Substrate and temperature on seed germination of Aspidosperma vargasii A. DC. (Apocynaceae)

2021 ◽  
Vol 17 (5) ◽  
pp. 66-72
Author(s):  
Izabele Domingues Soares Miranda ◽  
Manoela Mendes Duarte ◽  
Rodrigo Otávio Veiga de Miranda
Keyword(s):  
Seed Germination ◽  
Moisture Content ◽  
Relative Frequency ◽  
Germination Percentage ◽  
Percentage Germination ◽  
Forest Species ◽  
Randomized Design ◽  
Mean Germination Time ◽  
Completely Randomized Design ◽  
Number Of Seeds

The Amazon has a wide diversity, including forest species with timber and non-timber potential, which often have their use restricted due to a lack of silvicultural information. Thus, the present study aimed to evaluate the effect of substrates and temperatures on seed germination of Aspidosperma vagarsii. Therefore, the premise of a completely randomized design was followed, in a 3 x 3 factorial scheme, with three substrates (paper, sand and vermiculite) and three temperatures (20, 25 and 30 °C). The germination percentage, germination speed index and mean germination time were determined, as well as germination relative frequency graphs. In addition, the weight of a thousand seeds, the number of seeds per kilo, and the moisture content was determined. The weight of thousand seeds was equal to 276.4 g, with 3,618 seeds per kilo, and a moisture content of 9.5%. There was no interaction between the studied factors. The sand substrate and temperatures of 20 and 25 °C presented the best results for seed germination of A. vargasii.

scholarly journals Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
J.M.L. AZEVEDO ◽  
C.G.G. SANTOS ◽  
C.S. CAIRES ◽  
J.C. ARAÚJO NETO ◽  
R.C. SOUZA
Keyword(s):  
Moisture Content ◽  
Germination Rate ◽  
Germination Percentage ◽  
Percentage Germination ◽  
Essential Characteristic ◽  
Germination Time ◽  
Randomized Design ◽  
Different Temperatures ◽  
Mean Germination Time ◽  
Completely Randomized Design

ABSTRACT: The goal of this work was to characterize morphometrically diaspores from three species of mistletoes (Passovia pyrifolia, Struthanthus marginatus e Phoradendron mucronatum), as well as to study its germination behavior according to temperature and luminosity. In germination tests, the completely randomized design was used, in factor scheme 4 x 2, with 4 replications of 15 diaspores. The factors for the first test were different temperatures and two diaspore conditions (intact and without epicarp). In the second test, factors were different light qualities and two diaspore conditions. The analyzed variables were: germination percentage, germination rate index (GRI) and mean germination time (MGT). Mistletoe’s diaspores present an elliptic shape with viscin layer, an essential characteristic for the dispersion of the species. In addition to this, they present a distinction as for the moisture content when compared to the Loranthaceae and Viscaceae, where the latter presents the highest content. Germination is greater at the alternated temperature of 20-30 oC for P. pyrifolia and P. mucronatum diaspores and 20 oC for S. marginatus. Luminosity interfered in the germination of P. mucronatum and S. marginatus but did not influence P. pyrifolia. The diaspore condition influenced the germination of the three studied species, observing a significant increase in their germination when the epicarp was removed. Temperature and luminosity interfere directly in the GRI and MGT of the three mistletoes species.

scholarly journals Development of Liquid Enhancer for Germination of Drought-stressed Oryza sativa subsp. indica Seed cv. MR284

2019 ◽  
pp. 1-9 ◽  
Author(s):  
S. N. Mahadi ◽  
F. Zawawi ◽  
R. Nulit ◽  
M. H. Ibrahim ◽  
N. I. Ab. Ghani
Keyword(s):  
Oryza Sativa ◽  
Seed Germination ◽  
Germination Percentage ◽  
Leaf Length ◽  
Seed Vigor ◽  
Rice Seed ◽  
Combination Treatments ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Selection Of

Aim: This study was conducted to develop liquid enhancer containing KCl, TU, GA, and SA for germination of drought-stressed Oryza sativa subsp. indica cv. MR284 seed. Study Design: All experiments were conducted in a completely randomized design. Two steps were involved in the development process which are to select an ideal concentration for each KCl, TU, GA, and SA, and to find an ideal combination of chemicals from the selection of ideal concentrations acquired in step 1 to form liquid enhancer. There were 20 treatments for step 1 and 9 treatments for step 2. All of these treatments with 6 replicates. Place and Duration of Study: Department of Biology, Faculty of Science, University Putra Malaysia, between June 2018 and December 2018. Methodology: The sterilized rice seed cv. MR284 was stressed in the -1.2 Mpa PEG 6000 solution for three days and germinated in the KCl, TU, GA, and SA solution in a series of concentration for 10 days, in a controlled room. Seed germination was observed daily. Results: In the first step, drought-stressed rice seed showed the best germination performance in the 30 mM of KCl, 2.0 mM of TU, 0.24 mM GA, and 0.5 mM SA. Meanwhile, in the second step, the drought-stressed rice seed showed the best germination performance in the combination of 30 mM KCl + 2.0 mM TU + 0.24 mM GA + 0.5 mM SA. The best germination performance was evaluated by the highest germination percentage (%), germination index, seed vigor, leaf length, root length and biomass. Conclusion: Therefore, the combination treatments of 30 mM KCl + 2.0 mM TU + 0.5 mM SA was found to be the most effective and simplest liquid enhancer formula that has an ability to enhance seed germination of drought-stressed rice cv. MR284 seed.

scholarly journals EFFECTS OF TEMPERATURE, SUBSTRATE AND LUMINOSITY CONDITIONS ON CHIA SEED GERMINATION

2019 ◽  
Vol 32 (2) ◽  
pp. 411-418
Author(s):  
CLAUDIA KELY PIRES DE MATTOS SORANA ◽  
CARLOS HENRIQUE QUEIROZ REGO ◽  
FERNANDA BRITO CARDOSO ◽  
TIAGO ROQUE BENETOLI DA SILVA ◽  
ANA CARINA DA SILVA CÂNDIDO ◽  
...  
Keyword(s):  
Seed Germination ◽  
High Temperatures ◽  
Germination Test ◽  
Paper Substrate ◽  
Randomized Design ◽  
Chia Seed ◽  
Germination Speed ◽  
Mean Germination Time ◽  
Effects Of Temperature ◽  
Completely Randomized Design

ABSTRACT The aim of the present study was to evaluate the effects of temperature, substrate, and luminosity on chia seeds in order to determine adequate conditions for a germination test. The experiment consisted of a completely randomized design, in a 4 × 5 × 2 factorial scheme (four substrates × five temperatures × two luminosity conditions), with four replications. The following variables were analyzed: first germination count, germination, germination speed index, and mean germination time. Germination was best at 15, 20, 25, and 30 °C for the on-paper, paper roll, and sand substrates. However, in the presence of luminosity and at 25 °C, the on-paper substrate had the highest mean. For all substrates, the lowest germination was achieved at 35 °C, proving that high temperatures reduce chia seed germination. Germination speed index was highest at 25 and 30 °C for on-paper, paper roll, and sand substrates, in both the presence and absence of luminosity. Chia seeds are considered to be neutral photoblasts. Germination tests should be performed with the on-paper substrate, at 25 °C, and with a duration of seven days. The first count should be carried out four days after establishment of the test.

scholarly journals Temperatures and substrates for germination and vigor of Erythroxylum pauferrense Plowman seeds

2019 ◽  
Vol 41 ◽  
pp. e46030
Author(s):  
João Everthon da Silva Ribeiro ◽  
Arliston Pereira Leite ◽  
Jackson Silva Nóbrega ◽  
Edna Ursulino Alves ◽  
Riselane de Lucena Alcântara Bruno ◽  
...  
Keyword(s):  
Dry Mass ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Randomized Design ◽  
Temperature Regimes ◽  
Seedling Length ◽  
Physiological Quality ◽  
Mean Germination Time ◽  
Completely Randomized Design ◽  
Understory Plant

Erythroxylum pauferrense is an endemic understory plant species of the Northeast Region of Brazil. The species is of great importance to the region and so ecophysiological studies are needed for its preservation. The objective of the present study was to determine the best substrates and temperatures for testing germination and seed vigor of E. pauferrense. An experiment was performed comprising a completely randomized design in a 5 x 4 factorial scheme, with five temperature regimes (20, 25, 30, 35°C constant and 20-30°C alternating) and four types of substrates (paper, vermiculite, sand and commercial substrate). The following characteristics were evaluated: germination percentage, first germination count, germination speed index, mean germination time, seedling length and dry mass (root and shoot). Paper and vermiculite substrates combined with constant temperatures of 20, 25, 30 and alternated between 20-30°C, provide greater seed germination and vigor while 35°C reduces seed physiological quality.

scholarly journals Application of Young Coconut Water and “Kascing” Fertilizer to Red Palm Seed Germination

2017 ◽  
Vol 18 (1) ◽  
pp. 17
Author(s):  
Fatimatuz Zuhro ◽  
Hasni Ummul Hasanah ◽  
Sukadi Sukadi
Keyword(s):  
Seed Germination ◽  
Germination Rate ◽  
Water Concentration ◽  
Germination Percentage ◽  
Coconut Water ◽  
Randomized Design ◽  
Completely Randomized Design

Redpalm isornamentplantwhichpotentiallytobecultured.Thescarcityofredpalmmadeithashighmarket value and need to be preserved. However, the germination growth of red palm is slower than other kinds of palm, so the best way to germinate the red palm seed is needed. The aim of this research is to determine the effect of apliccation some young coconut water concentration and kascing fertilizer to red palm seed germination. The research used factorial completely randomized design with 5 replication, the first factor is young coconut water concentration (0%, 25%, 50%, 75%, and 100%) and the second factor is germination media (steril sand and kascing fertilizer). Variables measured were live germination percentage, speed germination rate, radicula length, and plumula height. Results of this study showed that the best germination media is steril sand and 0% concentration of young coconut water.

scholarly journals Germination and Seed Vigour of Indigenous Bean (Phaseolus Vulgaris) Genotype in Nepal

2021 ◽  
Vol 18 (2) ◽  
pp. 67-75
Author(s):  
Anupam Uprety ◽  
Bhishma Raj Dahal ◽  
Bishal Shrestha
Keyword(s):  
Phaseolus Vulgaris ◽  
Seed Germination ◽  
Germination Percentage ◽  
Vegetable Crop ◽  
Seed Vigour ◽  
True Leaf ◽  
Leaf Emergence ◽  
Randomized Design ◽  
Vigour Index ◽  
Completely Randomized Design

Bean is an important vegetable crop of Nepal but farmers of Jumla district of Nepal are experiencing low productivity, probably due to poor germination. Keeping these points in view, a study was conducted to determine the germination and seed vigour of various indigenous beans genotype of Jumla district during February to March, 2018. The promising lines of Jumli beans namely KBL-3, KBL-2, PB0002, PB0001, KBL-1 and farm saved KBL-3 were used under study. The experiment was laid in completely randomized design (CRD) with four replications and six treatments namely T1 = KBL-3, T2 = KBL-2, T3 = PB0002, T4 = PB0001, T5 = KBL-1 and T6 = Farm-saved KBL-3. Significant differences were observed in germination percentage, speed of germination, seed vigourindex and true leaf emergence among different lines of Jumli beans .The highest germination percentage (96%), seed vigour index (1367) and speed of germination (1.763) was found in the variety of KBL-3 whereas the lowest germination percentage (69%), seed vigour index (947) and speed of germination (0.968) were found in the variety of KBL-1. Days to true leaf emergence was found shortest in the KBL-3 (23.50) and longest in the farm saved KBL-3 (30.25). KBL-3 pureline of Jumli bean was found to be highly responsive to seed germination and vigour characteristics. Thus, it would be better to suggest the indigenous bean growing farmers of Jumla district to cultivate KBL-3 for better germination and seed vigour. SAARC J. Agri., 18(2): 67-75 (2020)

scholarly journals ASSESSMENT OF PERIODS OF SAND PRIMING AND HYDRO-PRIMING ON THE GERMINATION OF AFRICAN EBONY (Diospyros mespiliformis Hochst)

2017 ◽  
Vol 17 (1) ◽  
pp. 83-90
Author(s):  
D. O. ADELANI ◽  
R. A. SULEIMAN ◽  
U. U. EMEGHARA
Keyword(s):  
Tree Species ◽  
Mass Production ◽  
Percentage Germination ◽  
Germination Time ◽  
Randomized Design ◽  
Breaking Dormancy ◽  
Mean Germination Time ◽  
Completely Randomized Design ◽  
Agro Forestry

Diospyros mespiliformis (Hochst) is a multipurpose, agro-forestry tree species with diverse environmental and ecological significances. However, low percentage germination associated with its seeds has limited its domestication. To overcome this challenge, there is need to adopt cheap, fast, safe, natural and adoptable physiological techniques such as sand priming and hydro-priming. There is paucity of quantified information on natural and safe methods of relieving dormancy as sand priming and hydro-priming. Most of methods of breaking dormancy as use of acid are not simple, safe and adoptable by farmers who practices agro-forestry. In the light of this, these experiments were conducted to assess the periods of sand priming (0, 2, 4, 6 and 8 weeks) and hydro-priming (0, 2, 4, 6 and 8 weeks) on the germination of D. mespiliformis. Both experiments were laid down in completely randomized design with four replicates. Mean germination times were calculated, and result revealed that a significant increase in percentage germination was recorded with increasing periods of exposing seeds to sand priming up to four weeks. The percentage germination ranged between 28%-93.25% for control (0) and four weeks sand priming respectively. Least value of 8.92 day was recorded for mean germination time of control (0 sand priming). A significant increase in percentage germination was recorded with increasing hours of hydro-priming up to 24 hours. The percentage germination was ranged between 25% - 100% for control (0) hour to 24 hours. Highest germination percentages were recorded in seeds subjected to sand priming for 4weeks (93.25%) and those hydro-primed for 24hours (100%). These results are recommended for mass production of D. mespiliformis in agro-forestry nurseries.  

scholarly journals Sensitivity of Seed Germination to Temperature and Light in Helichrysum amorginum

2020 ◽  
Vol 77 (1) ◽  
pp. 7
Author(s):  
Sofia ARGYRIOU ◽  
Panayiota PAPASTYLIANOU ◽  
George STAVROPOULOS ◽  
Angeliki KOUSTA ◽  
Ioanna KAKABOUKI ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Survival ◽  
Germination Percentage ◽  
Effect Of Temperature ◽  
Germination Time ◽  
Randomized Design ◽  
Perennial Shrub ◽  
Mean Germination Time ◽  
Lower Temperature ◽  
Seed Propagation

Helichrysum amorginum is a perennial shrub, endemic on the Greek island of Amorgos and used for medicinal, cosmetic and ornamental purposes. Information concerning germination behavior and seedling survival is considered essential for the establishment and cultivation of wild species. The objective of this study was to investigate the effect of temperature and light on germination of Helichrysum amorginum seeds. A set of experiments was conducted under completely randomized design with four replications of 200 seeds at three different suboptimal germination temperatures (15, 20 and 25°C) in light and dark conditions for 10 days. Seed material was collected from two different fields of the island (Aegiali and Katapola). The germination performance was evaluated by final germination percentage and mean germination time. The effect of temperature on seed germination percentage and mean germination time was significant in all cases. The presence of light enhanced germination, especially at the optimum temperature of 20°C. In most cases the mean germination time increased at the lower temperature of 15°C. Seeds from Aegiali exhibited higher germination ability than the seed lot from Katapola. Knowledge of seed germination behaviour is of major importance in order to establish effective protocols for seed propagation in Helichrysum amorginum.

scholarly journals The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity Stress

2012 ◽  
Vol 76 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Maryam Haghighi ◽  
Zahra Afifipour ◽  
Maryam Mozafarian
Keyword(s):  
Seed Germination ◽  
Salinity Stress ◽  
Seedling Growth ◽  
Germination Rate ◽  
Germination Percentage ◽  
Percentage Germination ◽  
Tomato Seeds ◽  
Germination Characteristics ◽  
Salinity Levels ◽  
Mean Germination Time

The Alleviation Effect of Silicon on Seed Germination and Seedling Growth of Tomato Under Salinity StressThis study was conducted to evaluate the effectiveness of silicon (Si) application under salinity levels on seed germination and growth characteristics of tomato seeds. A laboratory experiment was performed on completely randomized design with two levels of salinity (25 and 50 mM NaCl) and 2 concentration of Si (1 and 2 mM) with 4 replications. Germination percentage, germination rate, seedling shoot and root length, fresh and dry weight of seedling and mean germination time was measured. Seed germination ofLycopersicon esculentumL. was significantly affected by salinity levels, Si and their interaction. Germination characteristics of tomato seeds decreased drastically by increasing NaCl concentrations. However, 1 mM Si had positive effects on seed germination characteristics and improved germination percentage, germination rate and mean germination time. Si alleviated the harmful effect of salinity stress on tomato seed germination at almost all germination characteristics.

scholarly journals The effects of NACL, KCL and MGCL2 on the germination of Brassica rapa var. parachinensis seed

2016 ◽  
Vol 4 (1) ◽  
pp. 52 ◽  
Author(s):  
Mona Ghanad ◽  
Rosimah Binit Nulit ◽  
Rusea Go ◽  
Christina Yong Seok Yien
Keyword(s):  
Seed Germination ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Salinity Treatment ◽  
Randomized Design ◽  
Multiple Comparison Test ◽  
Completely Randomized Design ◽  
One Way Anova ◽  
Range Test ◽  
Germinated Seeds

<p>This study was conducted to determine seed germination on the mechanisms of salinity stress in <em>B. rapa </em>var. <em>parachinensis </em>(Hong kong choy sum). The type of experiment was a completely randomized design with three salinity treatment NaCl, MgCl2, and KCl and minimum four replications was used. Salinity treatment consisted of 0 (control), 50, 100, 150, 200, mM concentrations. The experiment was carried out under 70% relative humidity at 23°C with a photoperiod of 8:16 h light/dark. The germinated seeds were counted every day and germination percentage, seed vigor, seed tolerance, length of seedling and biomass seedling was measured. The data were analyzed by one-way ANOVA multiple comparison test followed by Duncan’s multiple range test.</p>

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