16-O-Demethyl Fusicoccin J and Its 3-Epimer fromFusicoccum amygdali, and Their Seed Germination-stimulating Activity in the Presence of Abscisic Acid

1999 ◽  
Vol 63 (5) ◽  
pp. 951-954 ◽  
Author(s):  
Takeshi SASSA ◽  
Chang-Shan ZHANG ◽  
Naoto TAJIMA ◽  
Nobuo KATO
Keyword(s):  
Abscisic Acid ◽  
Seed Germination

Abscisic acid controls embryo growth potential and endosperm cap weakening during coffee (Coffea arabica cv. Rubi) seed germination

Planta ◽  
2004 ◽  
Vol 220 (2) ◽  
pp. 251-261 ◽  
Author(s):  
E. A. Amaral da Silva ◽  
Peter E. Toorop ◽  
Adriaan C. van Aelst ◽  
Henk W. M. Hilhorst
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Coffea Arabica ◽  
Growth Potential

scholarly journals Effects of hormonal priming on seed germination of pigeon pea under cadmium stress

2015 ◽  
Vol 87 (3) ◽  
pp. 1847-1852 ◽  
Author(s):  
LARISSA C. SNEIDERIS ◽  
MARINA A. GAVASSI ◽  
MARCELO L. CAMPOS ◽  
VICTOR D'AMICO-DAMIÃO ◽  
ROGÉRIO F. CARVALHO
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Efficient Method ◽  
Physiological Responses ◽  
Cadmium Stress ◽  
Pigeon Pea ◽  
Metal Stress ◽  
Hormonal Priming

In this work we investigated whether priming with auxin, cytokinin, gibberellin, abscisic acid and ethylene, alters the physiological responses of seeds of pigeon pea germinated under water and cadmium stress. Seeds treated with water or non-treated seeds were used as control. Although compared to non-treated seeds we found that the hormone treatments improve the germination of pigeon pea under cadmium stress, however, these treatments did not differ from water. However, we also observed a trend of tolerance to the effects of cadmium in the presence of ethylene, suggesting that the use of this hormone may be an efficient method to overcome seed germination under metal stress.

scholarly journals Arabidopsis SIGMA FACTOR BINDING PROTEIN1 (SIB1) and SIB2 inhibit WRKY75 function in abscisic acid-mediated leaf senescence and seed germination

2021 ◽  
Author(s):  
Haiyan Zhang ◽  
Liping Zhang ◽  
Yunrui Ji ◽  
Yifen Jing ◽  
Lanxin Li ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Leaf Senescence ◽  
Chromatin Immunoprecipitation ◽  
Sigma Factor ◽  
Dependent Manner ◽  
Negative Regulators ◽  
Factor Binding ◽  
Physiological Processes ◽  
Increased Sensitivity

Abstract The plant-specific VQ gene family participates in diverse physiological processes but little information is available on their role in leaf senescence. Here, we show that the VQ motif-containing proteins, Arabidopsis SIGMA FACTOR BINDING PROTEIN1 (SIB1) and SIB2 are negative regulators of abscisic acid (ABA)-mediated leaf senescence. Loss of SIB1 and SIB2 function resulted in increased sensitivity of ABA-induced leaf senescence. In contrast, overexpression of SIB1 significantly delayed this process. Moreover, biochemical studies revealed that SIBs interact with WRKY75 transcription factor. Loss of WRKY75 function decreased sensitivity to ABA-induced leaf senescence, while overexpression of WRKY75 significantly accelerated this process. Chromatin immunoprecipitation assays revealed that WRKY75 directly binds to the promoters of GOLDEN 2-LIKE1(GLK1) and GLK2, to repress their expression. SIBs repress the transcriptional function of WRKY75 and negatively regulate ABA-induced leaf senescence in a WRKY75-dependent manner. In contrast, WRKY75 positively modulates ABA-mediated leaf senescence in a GLK-dependent manner. In addition, SIBs inhibit WRKY75 function in ABA-mediated seed germination. These results demonstrate that SIBs can form a complex with WRKY75 to regulate ABA-mediated leaf senescence and seed germination.

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