乙烯在绿豆下胚轴不定根形成中的作用

选择易产生不定根的绿豆下胚轴做试验材料,研究乙烯在不定根形成中的作用。试验指出,乙烯利和乙烯气体在低浓度下(1—5mgL~(-1))促进或不抑制不定根的形成,随着浓度增加,抑制作用加强。IBA促进不定根形成的作用十分显著。IBA和乙烯相结合的试验说明,两者的作用似乎是独立的。可以设想,存在一个适于生根的低内源乙烯的界限,超过这个界限,抑制不定根形成。

EFFECTS OF ETHYLENE ON THE ADVENTITIOUS ROOT FORMATION OF PHASEOLUS AUREUS HYPOCOTYLS

The effect of etylene on the adventitious root formation has beenstudied through the experiments with Phaseolus aureus hypocotyls whichform adventitious roots easily. The study shows that ethephon and ethy-lene treatments with lower concentrations (1-5 ppm) have a stimulatingeffect or, as it were, no inhibiting effect on the adventitious root form-ation; however, their inhibiting effect becomes stronger as their concent-rations increase. IBA treatment has distinct stimulating effect on theadventitious root formation. Experiments with the incorperation of bothIBA and ethylene show that their effects seem to be independent.Therefore, it can be assumed that there exists a limit to endogenousethylene suitable for root formation, beyond which the adventitious rootformation will be inhibited.