DIFFERENTIAL AUXIN SENSITIVITY OF PROTON TRANSLOCATION BY PLASMA-MEMBRANE H+-ATPASE FROM TOBACCO-LEAVES

被引：46

作者：

SANTONI, V

VANSUYT, G

ROSSIGNOL, M

机构：

来源：

PLANT SCIENCE | 1990年 / 68卷 / 01期

关键词：

auxin; H[!sup]+[!/sup]-ATPase; Nicotiana tabacum; plasma membrane; proton translocation;

D O I：

10.1016/0168-9452(90)90149-I

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Auxin effects on the H+-ATPase promoted proton translocation in purified tobacco leaves plasma membrane vesicles were investigated according to the hormone concentration. Addition of IAA at low auxin concentrations was shown to induce a stimulation of the H+ translocation. However, an opposite effect was also observed at higher concentrations. In addition, auxin concentrations inducing both effects appeared to depend dramatically on the plant age: at the end of the induction to flowering period, the sensitivity is nearly 1000-fold higher than that of vegetative or flowering plants. Thus proton translocation may be either stimulated or inhibited by auxins, according to the hormone concentration and/or the physiological state of the plant. © 1990.

引用

页码：33 / 38

页数：6

共 16 条

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