Rice GERMIN-LIKE PROTEIN 2-1 Functions in Seed Dormancy under the Control of Abscisic Acid and Gibberellic Acid Signaling Pathways

Dormoats are derivatives of crosses between Avena sativa L. and A. fatua L., designed to be sown in the fall to germinate the following spring. Strains vary in levels of seed dormancy at harvest and in their rates of after-ripening in dry storage. Germination of the seeds is stimulated by gibberellic acid. Embryos isolated from dormant seeds exhibit no dormancy but their germination is prevented by abscisic acid. Low temperatures (ca. 7 C) stimulate germination to different levels in various strains. Seeds enter a secondary dormancy when they fail to germinate in the imbibed state due to primary domancy. Seeds with secondary dormancy are not stimulated to germinate by low temperatures until partial after-ripening of the seeds in the dry state has occurred, but germination is stimulated by gibberellic acid without after-ripening. Secondary dormancy is proposed as a factor in the maintenance of undergerminated seed in the soil from fall planting into winter.

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Dormancy of Nicotiana benthamiana seeds can be broken by different compounds

Biologia ◽

10.2478/s11756-009-0064-0 ◽

2009 ◽

Vol 64 (4) ◽

Cited By ~ 2

Author(s):

Andrea Wünschová ◽

Veronika Beňová ◽

Helena Vlašínová ◽

Ladislav Havel

Keyword(s):

Abscisic Acid ◽

Gibberellic Acid ◽

Sodium Nitroprusside ◽

Seed Dormancy ◽

Plant Hormones ◽

Nicotiana Benthamiana ◽

Potassium Ferricyanide ◽

Interesting Effect

AbstractThe influence of after-ripening, sodium nitroprusside, potassium ferricyanide, cyanide, paclobutrazol and nitrite on germination of seeds of Nicotiana benthamiana was investigated as well as the influence of plant hormones such as gibberellins and abscisic acid. Dormancy of N. benthamiana seeds was broken by all treatments except treatments with abscisic acid, paclobutrazol and gibberellic acid (GA3). Gibberellins had an interesting effect on dormancy breakage of studied seeds which was dependent on use of particular gibberellin: GA3 or GA4+7. Unlike GA3, GA4+7 had broken seed dormancy.

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Hormonal Aspects of Seed Dormancy in Yellow Foxtail

Weed Science ◽

10.1017/s0043174500036171 ◽

1972 ◽

Vol 20 (5) ◽

pp. 472-477 ◽

Cited By ~ 3

Author(s):

G. E. Kollman ◽

D. W. Staniforth

Keyword(s):

Abscisic Acid ◽

Gibberellic Acid ◽

Seed Dormancy ◽

Paper Chromatography ◽

Plant Hormones ◽

Effective Means ◽

Paper Electrophoresis ◽

Endogenous Inhibitor ◽

Ph Values ◽

Solvent Systems

Investigations with exogenous test solutions showed that abscisic acid (ABA) inhibited germination of nondormant seeds and that gibberellins (GA) promoted the germination of yellow foxtail (Setaria lutescens (Weigel) Hubb.) The effect of the promoters was much more readily demonstrated with excised caryopses than with intact seeds. Cytokinins reversed ABA inhibition of germination; GA did not, but the two promoters in combination were more effective than the cytokinin alone. The reversal occurred only at one end of the embryonic axis, the shoot end. An endogenous inhibitor was extracted from dormant and nondormant yellow foxtail seeds and compared with ABA by chromatography, electrophoresis, and bioassays. The extracted inhibitor was very similar to ABA in six paper-chromatography solvent systems, three paper electrophoresis runs at different pH values, and three bioassays. Paper electrophoresis was an effective means of separating the two plant hormones, ABA and gibberellic acid (GA3).

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GID1 modulates stomatal response and submergence tolerance involving abscisic acid and gibberellic acid signaling in rice

Journal of Integrative Plant Biology ◽

10.1111/jipb.12313 ◽

2015 ◽

Vol 57 (11) ◽

pp. 954-968 ◽

Cited By ~ 17

Author(s):

Hao Du ◽

Yu Chang ◽

Fei Huang ◽

Lizhong Xiong

Keyword(s):

Abscisic Acid ◽

Gibberellic Acid ◽

Submergence Tolerance ◽

Stomatal Response ◽

Gibberellic Acid Signaling

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Identification and Bioinformatic Analysis of the GmDOG1-Like Family in Soybean and Investigation of Their Expression in Response to Gibberellic Acid and Abscisic Acid

Plants ◽

10.3390/plants9080937 ◽

2020 ◽

Vol 9 (8) ◽

pp. 937

Author(s):

Yingzeng Yang ◽

Chuan Zheng ◽

Umashankar Chandrasekaran ◽

Liang Yu ◽

Chunyan Liu ◽

...

Keyword(s):

Abscisic Acid ◽

Seed Germination ◽

Gibberellic Acid ◽

Seed Dormancy ◽

Expression Patterns ◽

Evolutionary Relationship ◽

Soybean Seed ◽

Bioinformatic Analysis ◽

Chromosomal Distribution ◽

Seed Dormancy And Germination

Seed germination is one of the most important stages during plant life cycle, and DOG1 (Delay of germination1) plays a pivotal regulatory role in seed dormancy and germination. In this study, we have identified the DOG1-Like (DOG1L) family in soybean (Glycine max), a staple oil crop worldwide, and investigated their chromosomal distribution, structure and expression patterns. The results showed that the GmDOG1L family is composed of 40 members, which can be divided into six subgroups, according to their evolutionary relationship with other known DOG1-Like genes. These GmDOG1Ls are distributed on 18 of 20 chromosomes in the soybean genome and the number of exons for all the 40 GmDOG1Ls varied greatly. Members of the different subgroups possess a similar motif structure composition. qRT-PCR assay showed that the expression patterns of different GmDOG1Ls were significantly altered in various tissues, and some GmDOG1Ls expressed primarily in soybean seeds. Gibberellic acid (GA) remarkably inhibited the expression of most of GmDOG1Ls, whereas Abscisic acid (ABA) inhibited some of the GmDOG1Ls expression while promoting others. It is speculated that some GmDOG1Ls regulate seed dormancy and germination by directly or indirectly relating to ABA and GA pathways, with complex interaction networks. This study provides an important theoretical basis for further investigation about the regulatory roles of GmDOG1L family on soybean seed germination.

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Seed dormancy and germination in Oenanthe stolonifera as affected by temperature and gibberellic acid

Horticulture Environment and Biotechnology ◽

10.1007/s13580-020-00292-0 ◽

2020 ◽

Author(s):

Hyun Jin Kim ◽

Haeyoung Na

Keyword(s):

Gibberellic Acid ◽

Seed Dormancy ◽

Seed Dormancy And Germination

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Initiation and morphological development of somatic embryoids from barley cell cultures

Canadian Journal of Botany ◽

10.1139/b84-167 ◽

1984 ◽

Vol 62 (6) ◽

pp. 1245-1249 ◽

Cited By ~ 41

Author(s):

L. S. Kott ◽

K. J. Kasha

Keyword(s):

Somatic Embryogenesis ◽

Abscisic Acid ◽

Gibberellic Acid ◽

Cell Cultures ◽

Dichlorophenoxyacetic Acid ◽

Morphological Development ◽

Low Concentrations ◽

The Media ◽

2,4 Dichlorophenoxyacetic Acid ◽

Barley Cell

Somatic embryogenesis was induced in callus previously initiated from immature embryos of barley. These cultures ranged in age from 6 weeks to 30 months. Embryoids were readily initiated from homogenized suspension-grown aggregates when plated on modified B5 media with 2,4-dichlorophenoxyacetic acid. Low concentrations (0.1 and 0.05 mg∙L−1) of abscisic acid promoted further maturation of embryoids, while gibberellic acid (1 mg∙L−1) and kinetin (0.1 mg∙L−1) were used in the media to encourage embryoid germination. The development of somatic embryoids from initiation through maturation and germination is described.

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Endogenous hormonal content during grain development in hexaploid and tetraploid wheat

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v33i3.1608 ◽

1970 ◽

Vol 33 (3) ◽

pp. 493-502 ◽

Cited By ~ 3

Author(s):

Sridhar Gutam ◽

Virendra Nath ◽

GC Srivastava

Keyword(s):

Growth Rate ◽

Acetic Acid ◽

Abscisic Acid ◽

Gibberellic Acid ◽

Grain Growth ◽

Indole Acetic Acid ◽

Tetraploid Wheat ◽

Weight Basis ◽

Ploidy Levels ◽

Hormonal Content

A pot experiment was conducted in the rabi (post rainy) seasons of 2001 and 2002 to study the genotypic differences in grain growth rate and endogenous hormonal content in the developing grains of hexaploid and tetraploid wheat. The endogenous hormonal contents of grains in both the ploidy levels had changed in sequence. At 5 days after anthesis (DAA), gibberellic acid (GA3); at 15 DAA (rapid growth phase), indole-acetic acid (IAA); at 25 DAA (dough stage), abscisic acid (ABA) were maximum. At 35 DAA, all the endogenous hormonal level decreased and among the hormones, ABA was highest followed by IAA and GA3. Hexaploids recorded higher concentrations of endogenous hormones (13.38% IAA, 17.89% GA3, and 14.7% ABA) on fresh weight basis and resulted in higher seed weight (56.99 mg/grain) and grain growth rate (0.009 g/g/day) compared to tetraploids (49.08 mg/grain; 0.008 g/g/day) on dry weight basis by better mobilization of photosynthates during grain filling. Key Words: Grain growth rate, hormones, indole-acetic acid, gibberellic acid, abscisic acid. doi:10.3329/bjar.v33i3.1608 Bangladesh J. Agril. Res. 33(3) : 493-502, September 2008

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