Physiological mechanisms of adaptation of alloplasmic wheat hybrids to soil drought

We studied physiological mechanisms of plant adaptation to drought for two alloplasmic wheat (Triticum aestivum L.) hybrids (APHs) on the cytoplasm of rye (Secale cereale L.) or ovate goatgrass (Aegilops ovata L.) and two standard regionalized spring wheat cultivars, Kometa and Priokskaya. In response to plant tissue dehydration, APHs rapidly reduced the transpiration rate and lost much less water than standard cultivars. During drought, peroxidase activity was significantly increased only in APH on the rye cytoplasm, whereas it declined substantially in cv. Kometa. Peroxidation of lipids (POL) was activated in cv. Kometa stronger than in hybrids, which also indicates that, in this cultivar, there was no complete detoxification of hydrogen peroxide under stress conditions. After watering resumption, APHs displayed a better capacity for reparation than standard cultivars, which was manifested in peroxidase activation and POL suppression, i.e., in more complete reduction of the oxidative stress consequences. We concluded that a higher APH drought resistance, as compared with standard cultivars, was determined by their more efficient antioxidant defense and a better capacity for recovery. © 2007 Pleiades Publishing, Ltd.

Авторы
Kholodova V.P.1 , Bormotova T.S.1 , Semenov O.G. 2 , Dmitrieva G.A.2 , Kuznetsov Vl.V. 1, 2
Редакторы
-
Издательство
-
Номер выпуска
4
Язык
Английский
Страницы
480-486
Статус
Опубликовано
Подразделение
-
Номер
-
Том
54
Год
2007
Организации
  • 1 Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul. 35, Moscow, 127276, Russian Federation
  • 2 Peoples's Friendship University, ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Ключевые слова
Alloplasmic wheat hybrids; Drought; Oxidative stress; Triticum aestivum; Water status
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3228/