脱落酸类似物在正常和萎蔫突变型番茄植株中的代谢及生物活性

The metabolism and biological activity of ABA analogues in normal and flacca mutant tomato plants.

作者信息

Linforth R S T, Taylor I B, Duckham S C, Al-Naieb R J, Bowman W R, Marples B A

机构信息

Department of Physiology and Environmental Science, University of Nottingham, Faculty of Agricultural and Food Sciences, Sutton Bonington, Loughborough LEI2 5RD, UK.

Department of Chemistry, University of Technology, Loughborough LE11 3TU, UK.

出版信息

New Phytol. 1990 Jul;115(3):517-521. doi: 10.1111/j.1469-8137.1990.tb00479.x.

DOI:10.1111/j.1469-8137.1990.tb00479.x

PMID:33874288

Abstract

The metabolism of deuterium-labelled analogues of ABA by normal and flacca mutant tomato plants was investigated. Comparison of the biological activity of ABA, ABA alcohol, ABA aldehyde and their 2-trans isomers was made in both mutant and non-mutant genotypes. While in normal plants ABA alcohol and ABA aldehyde were as effective as ABA in inducing stomatal closure, in the flacca mutants only ABA itself was biologically active. Both ABA alcohol and ABA aldehyde were converted to the inactive compound trans- ABA alcohol instead of ABA when fed to flacca plants. As trans-ABA aldehyde was also readily converted to trans-ABA alcohol by flacca plants, it was not possible to establish whether isomerization precedes reduction or vice versa in the synthesis of trans-ABA alcohol from ABA aldehyde.

摘要

研究了正常和萎蔫突变型番茄植株对脱落酸（ABA）氘标记类似物的代谢情况。对突变型和非突变型基因型植株中ABA、ABA醇、ABA醛及其2-反式异构体的生物活性进行了比较。在正常植株中，ABA醇和ABA醛在诱导气孔关闭方面与ABA一样有效，但在萎蔫突变体中，只有ABA本身具有生物活性。将ABA醇和ABA醛施用于萎蔫植株时，它们都被转化为无活性的反式ABA醇而非ABA。由于萎蔫植株也能轻易地将反式ABA醛转化为反式ABA醇，因此无法确定在从ABA醛合成反式ABA醇的过程中，异构化是先于还原反应还是反之。