Co#+（2+）在豌豆根系缺铁适应性反应中的作用

双子叶植物在缺铁时会发生一系列形态、生理、生化的适应性反应以提高对铁的吸收能力〔１〕。对其调控机理虽提出了很多假说，但至今尚没有定论。近年来Ｒｏｍｅｒａ等人〔２〕研究认为黄瓜、向日葵和豌豆等植物根系缺铁适应性反应可能与乙烯的作用有关。本文以豌豆亲本与...

Effect of Cobalt on Root Responses to Iron Deficiency in Peas (Pisum sativum L.)

The effect of ethylene biosynthesis inhibitor Co2 on iron reducing activity of roots in pea plants was studied in nutrient solution. The results showed that 100mol/L CoSO4 inhibited iron reducing activity of roots in iron deficient E107 plants but not in iron sufficient plants. 100mol/L CoSO4 stimulated root responses of Sparkle peas while 1 or 10 mol/L CoSO4 did not affect the responses significantly. There was a poor correlation between ethylene release and iron reducing activity of roots. These suggested that the effect of Co2 on iron deficiency responses of roots depended on its concentration and plant genotypes. The involvement of ethylene in regulating of root responses has not been determined.