Tal M
Department of Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Plant Physiol. 1979 Jun;63(6):1044-8. doi: 10.1104/pp.63.6.1044.
The wilty tomato mutant flacca, the normal cultivar Lycopersicon esculentum Mill. Rheinlands Ruhm, and abscisic acid-induced phenotypic revertants were compared with respect to ethylene evolution, activity of tryptophan aminotransferase, and [1-(14)C]indoleacetic acid decarboxylation.The level of ethylene evolution was higher in flacca plants than in the normal cultivar. Ethylene evolution was reduced to the wild type level in abscisic acid-induced phenotypic revertants and to a lesser extent in mutant plants grown under humid conditions. Leaf epinasty, which characterized flacca plants in the present experiments, did not appear in absciscic acid-treated mutant plants, but did appear under high humidity. Tryptophan aminotransferase activity, similar to ethylene evolution, was higher in flacca plants and was reduced to the normal level by abscisic acid treatment. Indoleacetic acid decarboxylation was similar in mutant and normal plants, but was increased by abscisic acid treatment. The relationships among ethylene, auxin, and the morphological symptoms which characterize the mutant are discussed.
对萎蔫型番茄突变体flacca、正常栽培品种番茄（Lycopersicon esculentum Mill. Rheinlands Ruhm）以及脱落酸诱导的表型回复突变体，在乙烯释放、色氨酸转氨酶活性和[1-(14)C]吲哚乙酸脱羧方面进行了比较。flacca植株的乙烯释放水平高于正常栽培品种。在脱落酸诱导的表型回复突变体中，乙烯释放降低到野生型水平，而在潮湿条件下生长的突变体植株中，乙烯释放降低程度较小。在本实验中表征flacca植株的叶片偏上性，在脱落酸处理的突变体植株中未出现，但在高湿度条件下出现。色氨酸转氨酶活性与乙烯释放相似，在flacca植株中较高，经脱落酸处理后降低到正常水平。吲哚乙酸脱羧在突变体和正常植株中相似，但经脱落酸处理后增加。讨论了乙烯、生长素与表征该突变体的形态症状之间的关系。
