scholarly journals Effects of plant hormones and 20-hydroxyecdysone on tomato (Lycopersicum esculentum) seed germination and seedlings growth

2007 ◽  
Vol 6 (24) ◽  
pp. 2792-2802 ◽  
Author(s):  
Bakrim Ahmed ◽  
Lamhamdi Mostapha ◽  
Sayah Fouad ◽  
Chibi Fatiha
Keyword(s):  
Seed Germination ◽  
Plant Hormones ◽  
Lycopersicum Esculentum

scholarly journals Transcriptome and metabolome analyses revealing the potential mechanism of seed germination in Polygonatum cyrtonema

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rong Liu ◽  
Jing Lu ◽  
Jiayi Xing ◽  
Mei Du ◽  
Mingxiu Wang ◽  
...  
Keyword(s):  
Seed Germination ◽  
Organic Acids ◽  
Plant Hormones ◽  
Regulatory Networks ◽  
Amylase Activity ◽  
Flavonoid Biosynthesis ◽  
Market Demand ◽  
Potential Mechanism ◽  
Flavonoid Synthesis ◽  
Germinated Seeds

AbstractPolygonatum cyrtonema Hua (Huangjing, HJ) has medicinal and edible value in China. However, the seeds of this plant are naturally difficult to germinate. Therefore, to elucidate the mechanism underlying the germination of this plant in order to meet the market demand, the metabolomic and transcriptomic analyses were performed in this study. We observed that plant hormones and α-amylase activity were differentially regulated when comparing germinated and un-germinated seeds. In addition, the metabolites related to phenylpropanoid and flavonoid biosynthesis were significantly up-accumulated in germinated seeds. Hydroxycinnamoyl derivatives and organic acids were observed to be significantly decreased during germination. The results of this study suggested that compared to un-germinated seeds, germinated seeds promote flavonoid synthesis and inhibit lignin synthesis which could be beneficial to the germination of HJ seeds. Furthermore, these results suggested that starch if hydrolyzed into glucose, which could provide the necessary energy for germination. Our results may help to establish a foundation for further research investigating the regulatory networks of seed germination and may facilitate the propagation of HJ seeds.

scholarly journals Enhanced germination performance of dormant seeds of Eragrostis tef in the presence of light

2019 ◽  
Vol 7 (3) ◽  
pp. 244-251
Author(s):  
Iskender Tiryaki ◽  
Sakir Anil Kaplan
Keyword(s):  
Seed Germination ◽  
Seed Dormancy ◽  
Plant Hormones ◽  
Indole Acetic Acid ◽  
Germination Percentage ◽  
Eragrostis Tef ◽  
Crop Establishment ◽  
Giberellic Acid ◽  
Related Plant ◽  
Time Required

Lack of germination or low germination due to seed dormancy prevents successful crop establishment in several important plants. To determine the presence of innate seed dormancy and effects of stress-related plant hormones on germination performance of Teff (Eragrostis tef) seeds, we primed seeds in 1% KNO3 for 24 hours in dark conditions at 21 ± 0.5 ºC along with varying concentrations of chemicals known to influence seed germination, including: acetyl salicylic acid (ASA); methyl jasmonate (JA-Me); giberellic acid (GA3); and indole acetic acid (IAA). Primed seeds were incubated either in constant light (210 µM/m2/s) or in darkness at 21 ± 0.5 ºC. The results indicated that primingsignificantly improved final germination percentage (FGP) in both light (92.5%) and dark (89.4%) conditions compared with untreated seeds. The inclusion of plant hormones in the priming media generally had limited effects, except for 10 mM ASA (94.5%) and 100 mM GA3 (92.5%). ASA generally provided faster seed germination than seeds primed in 1% KNO3 only, while the other plant hormones had no effect on the time required for 50% of FGP in the dark. Priming had no significant effect on time span of germination in either light or dark incubation conditions. The results demonstrate that E. tef has light-inducible seed germination and about half of freshly harvested seeds can be dormant, which can be eliminated to some extent by priming seeds in 1% KNO3.

Plant hormones and seed germination

2014 ◽  
Vol 99 ◽  
pp. 110-121 ◽  
Author(s):  
Mohammad Miransari ◽  
D.L. Smith
Keyword(s):  
Seed Germination ◽  
Plant Hormones

Effects of different plant hormones or PEG seed soaking on maize resistance to drought stress

2014 ◽  
Vol 94 (8) ◽  
pp. 1491-1499 ◽  
Author(s):  
Zhiheng Yuan ◽  
Chuntian Wang ◽  
ShiPeng Li ◽  
Xiao Li ◽  
Fuju Tai
Keyword(s):  
Drought Stress ◽  
Seed Germination ◽  
Plant Growth ◽  
Seedling Growth ◽  
Plant Hormones ◽  
Germination Rate ◽  
Seed Vigor ◽  
Seedling Resistance ◽  
Seed Soaking ◽  
Maize Resistance

Yuan, Z., Wang, C., Li, S., Li, X. and Tai, F. 2014. Effects of different plant hormones or PEG seed soaking on maize resistance to drought stress. Can. J. Plant Sci. 94: 1491–1499. Drought stress has a major impact on plant growth and productivity, and seed soaking is an important way to increase seedling resistance to drought stress. This study investigated whether drought hardening chemicals, such as polyethylene glycol (PEG), or plant growth regulators enhance plant drought tolerance. The effects of PEG and several plant hormones, such as indoleacetic acid, gibberellic acid 3, 6-benzylaminopurine (6-BA), on seed germination and seedling growth under drought stress were analyzed. The results revealed that seed soaking with 5×10−3 mg L−1 6-BA or 10% PEG improved maize seed germination parameters under drought stress, including seedlings dry weight, seed vigor and germination rate. In addition, some physiological indices, such as superoxide dismutase and catalase activities, soluble protein contents and malondialdehyde etc. in seedlings under drought stress were improved compared with the control. Therefore, the application of 6-BA or PEG as a seed soak treatment had a significant and synergistic effect on seed germination and seedling growth under drought stress. However, the PEG seed soak treatment maybe slightly lead to plant damage and then improved plant ability to acquire some resistance to stress, the 6-BA were not so.

scholarly journals Seed germination and dormancy of Miconia chartacea (Melastomataceae) in response to light, temperature and plant hormones.

2015 ◽  
Vol 63 (4) ◽  
pp. 1169 ◽  
Author(s):  
Diego F. Escobar Escobar ◽  
Victor J. M. Cardoso
Keyword(s):  
Seed Germination ◽  
Plant Hormones ◽  
Mata Atlântica ◽  
Mata Atlantica

<p><em>Miconia chartacea</em> es un árbol con amplia distribución altitudinal y latitudinal en Brasil, que se encuentra desde formaciones vegetales estacionales xerofíticas como <em>Caatinga</em> y <em>Cerrado</em> hasta bosques pluviales como <em>Mata Atlántica</em>, en pastizales con árboles aislados hasta interior de bosques maduros. Fue descrita la respuesta germinativa de las semillas de <em>M. chartacea </em>a la luz, temperatura, hormonas vegetales y posmaduración a baja temperatura. Los frutos se recolectaron en la reserva de <em>Cerrado</em> “Prof. Karl Arens”, en el municipio Corumbataí (San Paulo, Brasil), la cual presenta una estación seca y fría desde abril hasta septiembre y una estación húmeda y caliente de octubre a marzo. Las semillas se dispersaron durante la estación seca, son fotoblásticas positivas bajo temperaturas constantes y variables, la germinación disminuye bajo irradiaciones de luz blanca inferiores a 17 μmol/m<sup>2</sup>s, la razón rojo/rojo lejano (R/RL) no afectó el porcentaje de germinación, pero la velocidad de germinación aumentó a partir de razones R/RL ≥ 0.4. Las semillas germinaron en el intervalo térmico de 15 a 35 °C, la temperatura optima esta entre 20 y 25 °C, la alternancia de temperatura no estimuló la germinación respecto a las temperaturas constantes. Las semillas presentaron latencia fisiológica no profunda, la cual fue rota mediante posmaduración durante 93 días a 7 °C y el etileno estimuló la germinación. La gama de temperaturas en la cual germinan las semillas fue menor en las semillas maduradas bajo las condiciones más calientes de la transición de la estación lluviosa a seca que las semillas maduradas en la estación seca. El requerimiento de un periodo frío para romper latencia disminuye la probabilidad de que las semillas germinen durante el invierno, quedando listas para germinar en el verano. Así, la detección de cambios estacionales de temperatura del suelo y el aumento de sensibilidad a la temperatura después de un periodo de frío son responsables por el control temporal de la germinación de <em>M. chartacea</em>, mientras que la respuestas a luz permite que solo germinen las semillas que están en la superficie del suelo, y favorece la germinación en claros de bosque pequeños a grandes.</p>

scholarly journals Exogenous Melatonin accelerates seed germination in cotton(Gossypium hirsutum L.)

2019 ◽  
Author(s):  
Shuang Xiao ◽  
Liantao Liu ◽  
Hao Wang ◽  
Dongxiao Li ◽  
Zhiying Bai ◽  
...  
Keyword(s):  
Seed Germination ◽  
Plant Hormones ◽  
Cotton Seed ◽  
Germination Rate ◽  
Melatonin Treatment ◽  
Low Concentrations ◽  
Vigor Index ◽  
Cotton Seeds ◽  
High Concentrations ◽  
Aba Content

AbstractSeed germination is considered as the beginning of the spermatophyte lifecycle, as it is a crucial stage in determining subsequent plant growth and development. Although many previous studies have found that melatonin can promote seed germination, the role of melatonin in cotton germination remains unexamined. The main objective of this study is the characterization of potential promotional effects of melatonin (at doses of 0, 10, 20, 50, 100 and 200 μM) on cotton seed germination. This experiment demonstrated that low concentrations of melatonin can promote germination, while high concentrations failed to promote germination and even inhibited germination. Together, these results indicate that a 20 μM melatonin treatment optimally promotes cotton seed germination. Compared with the control, germination potential (GP), germination rate (GR) and final fresh weight (FW) increased by 16.67%, 12.30% and 4.81% respectively. Although low concentrations of melatonin showed some improvement in vigor index (VI), germination index (GI) and mean germination time (MGT), these effects did not reach significant levels. Antioxidant enzyme activity during seed germination was most prominent under the 20 μM melatonin treatment. Superoxide dismutase (SOD) and peroxidase (POD) activities were significantly increased by 10.37–59.73% and 17.79–47.68% compared to the melatonin-free control. Malondialdehyde (MDA) content was reduced by 16.73–40.33%. Two important plant hormones in seed germination were also studied. As melatonin concentration increased, ABA content in seeds decreased first and then increased, and GA3 content showed a diametrically opposite trend, in which the 20 μM melatonin treatment was optimal. The 20 μM melatonin treatment reduced ABA content in seeds by 42.13–51.68%, while the 20 μM melatonin treatment increased GA3 content in seeds to about 1.7–2.5 times that of seeds germinated without melatonin. This study provides new evidence suggesting that low concentrations of melatonin can promote cotton seed germination by increasing the activity of antioxidant enzymes, thereby reducing the accumulation of MDA and regulating plant hormones. This has clear applications for improving the germination rate of cotton seeds using melatonin.

beta-Glucosidase activities and HCN liberation in unimbibed and imbibed seeds, and the induction of cocklebur seed germination by cyanogenic glycosides

1991 ◽  
Vol 83 (1) ◽  
pp. 34-40 ◽  
Author(s):  
Yohji Esashi ◽  
Shinichi Matsuyama ◽  
Hiroki Ashino ◽  
Maria Ogasawara ◽  
Ryo Hasegawa
Keyword(s):  
Seed Germination ◽  
Cyanogenic Glycosides ◽  
Beta Glucosidase
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