Effects of Gibberellic Acid Treatment for Pollen Sterility Induction on the Physiological Activity and Endogenous Hormone Levels of the Seed in Safflower

Turkish Journal of Biology

HASAN BAYDAR¹ 

关键词: Safflower;    Carthamus tinctorius L.;    Seed physiology;    Gibberellic acid;    Plant hormones;    Pollen sterility;   

学科分类：生物科学（综合）

来源: Scientific and Technical Research Council of Turkey - TUBITAK

【 摘 要 】

In this research, our aim was to determine the effects of gibberellic acid, which was applied to safflower plants (Carthamus tinctorius L. cv. Dinçer 5-118) for pollen sterility induction, on some physiological activity and endogenous hormone levels of the seeds. Exogenously applied gibberellic acid (GA_3) strongly influenced the endogenous hormone levels of the seeds by decreasing the levels of GA_3 and zeatin, and increasing the levels of indole-3-acetic acid (IAA) and abscisic acid (ABA). The lowered endogenous GA_3/ABA and zeatin/IAA ratios in the seeds significantly decreased the germination percentage and hypocotyl elongation, respectively. The seeds from GA_3 treated plants had more hull percentage and less oil content than seeds from the non-GA_3 treated plants. As a consequentce, it was indicated that poor germination and emergence vigor might be a major problem in hybrid safflower seeds produced from plants treated with gibberellic acid.

【 授权许可】

Unknown