Effects of abscisic acid analogues on abscisic acid-induced gene expression in barley aleurone protoplasts: Relationship between structure and function of the abscisic acid molecule
✍ Scribed by R. M. Van der Meulen; F. Heidekamp; B. Jastorff; R. Horgan; M. Wang
- Publisher
- Springer
- Year
- 1993
- Tongue
- English
- Weight
- 794 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0721-7595
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✦ Synopsis
The plant hormone abscisic acid (ABA) mediates gene expression in barley aleurone protoplasts. In order to elucidate the essential functional groups of the ABA molecule, the specificity of a number of ABA analogues for inducing ABAregulated gene (e.g., RAB, BASI) expression in barley aleurone protoplasts was studied. These analogues have modifications at three different positions of the ABA molecule: (a) the l'-hydroxyl group (l'-deoxy ABA), (b) the carboxyl group (ABA-methyl ester or ABA-glucose ester), and (c) both the l'-hydroxyl and 4'-carbonyl groups (otionylidene acetic acid). The importance of the different putative functional groups was analyzed. The dose-response analysis of ABA analogues upon the induction gene expression showed the following order: ABA > ABA methyl ester > l'-deoxy ABA > ABA glucose ester > ot-ionylidene acetic acid > a-13-ionone.