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TISSUE-SPECIFIC ACTIVITIES OF SEVERAL ENZYMES OF C4 ACID METABOLISM AND THE CALVIN CYCLE IN WHEAT PLANTS UNDER WATER-DEFICITстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: YUZBEKOV AK, SHMATKO IG
- Журнал: Russian Journal of Plant Physiology
- Том: 41
- Номер: 1
- Год издания: 1994
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 94
- Последняя страница: 99
- Аннотация: For several enzymes belonging to the phosphoenolpyruvate carboxylase (PEPC) system, a trend for enhancing activities was manifested under water deficit in flag leaves, spikelet glumes, awns, and pericarps of Triticum aestivum L. The activities of the enzymes of C4 acid metabolism were found to be much higher in ear than in flag leaf. Ribulose-1,5-bisphosphate carboxylase-oxygenase and NADP-glyceraldehyde-3-phosphate dehydrogenase activities in the leaf were higher than in pericarp almost by an order of magnitude though the ratio of these activities was similar in the two tissues. Considerable variations in enzyme activities related to C4 acid metabolism were demonstrated when leaf and ear parts were compared, however, and the ratios of these activities did not change practically. NAD-dependent decarboxylating malate dehydrogenase (NAD-ME) was shown to predominate in malate decarboxylation in flag leafs, spikelet glumes, awns, and pericarps, while phosphoenolpyruvate carboxykinase and oxaloacetate decarboxylase activities were not found. Several enzyme activities of the PEPC system (PEPC, NAD-malate dehydrogenase, NADP-malate dehydrogenase, NADP-malic enzyme, aspartate and alanine aminotransferases) were demonstrated in leaf and ear parts; this suggests that C4 acid metabolism, similar to that in the sheath cells of C4 plants and in several species with crassulacean acid metabolism, possessing NAD-ME type of malate decarboxylation, was accomplished in these tissues.
- Добавил в систему: Юзбеков Ахмед Кадималиевич