【hsiao1997】評論

(E) Abscisic acid: promote seeds dormancy(E) Giberellins (GAs), Cytokinin: Release of seeds from dormancy

【陳夢陽】評論

Abscisic acid (ABA)(離層素) is a plant hormone that primarily regulates seed dormancy, closing of stomata, and tolerance to abiotic stress such as drought, salt, and cold. It does not directly play a role in the release of seeds from dormancy. Rather, once the conditions are favorable for germination, other hormones such as gibberellins(吉貝素) and cytokinins(細胞分裂素) are responsible for breaking seed dormancy and promoting germination.其他選項：(A)Salicylic acid(水楊酸): Resistance of plants to some pathogens(病原體)(B) Ethylene: Fruit abscission(脫落)(C) Auxin(生長素): Apical dominance(頂芽優勢)(D) Brassinosteroids(油菜內脂): Leaf morphogenesis(型態生成)油菜內脂功能：Promotion of cell expansion and cell elongation; work with auxins to do so.It has an unclear role in cell division and cell wall regeneration.Promotion of vascular differentiation; BR signal transduction has been studied during vascular differentiation.Is necessary for pollen elongation for pollen tube formation.Acceleration of senescence in dying tissue cultured cells; delayed senescence in BR mutants supports that this action may be biologically relevant.Can provide some protection to plants during chilling and drought stress.