Статья

Exogenous γ-aminobutyric acid (GABA)-induced signaling events and field performance associated with mitigation of drought stress in <i>Phaseolus vulgaris</i> L

Hany G. Abd El-GawadDepartment of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, EgyptSoumya Mukherjee, Department of Botany, Jangipur College, University of Kalyani, West Bengal, IndiaReham FaragDepartment of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, EgyptOla H. Abd ElbarDepartment of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, EgyptMohamed HikalDepartment of Biochemistry, Faculty of Agriculture, Ain Shams University, Cairo, EgyptAhmed Abou El-YaziedDepartment of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, EgyptSalama Abd ElhadyDepartment of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, EgyptNesreen HelalDepartment of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, EgyptAmr ElkelishBotany Department, Faculty of Science, Suez Canal University, Ismailia, EgyptNihal El NahhasDepartment of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, EgyptEhab AzabBotany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, Sharkia, EgyptIsmail A. IsmailAgricultural Genetic Engineering Research Institute, Agricultural Research Center, Giza, EgyptSonia MbarkiLaboratory of Valorisation of Unconventional Waters, National Institute of Research in Rural Engineering, Water and Forests(INRGREF), Ariana, TunisiaMohamed F. M. IbrahimDepartment of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt

2020en

ABI

Аннотация

L.) plants under semiarid conditions. Present work aims to investigate the role of exogenous GABA (foliar application; 0.5, 1 and 2 mM) in amelioration of drought stress and improvement of field performance on snap bean plants raised under two drip irrigation regimes (100% and 70% of water requirements). Water stress led to significant reduction in plant growth, leaf relative water content (RWC), cell membrane stability index (CMSI), nutrient uptake (N, P, K, Ca, Fe and Zn), pod yield and its content from protein and total soluble solids (TSS). Meanwhile, lipid peroxidation (malondialdehyde content- MDA), osmolyte content (free amino acids- FAA, proline, soluble sugars) antioxidative defense (activity of superoxide dismutase- SOD, catalase- CAT, peroxidase- POX and ascorbate peroxidase- APX) and the pod fiber content exhibited significantly increase due to water stress. Exogenous GABA application (especially at 2 mM) revealed partial normalization of the effects of drought stress in snap bean plants. GABA-induced mitigation of drought stress was manifested by improvement in growth, water status, membrane integrity, osmotic adjustment, antioxidant defense and nutrient acquisition. Furthermore, GABA application during water stress in snap bean plants resulted in improvement of field performance being manifested by increased pod yield and its quality attributes. To sum up, exogenous GABA appears to function as an effective priming molecule to alleviate drought stress in snap bean plants under semiarid conditions.

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Идентификаторы

DOI: 10.1080/15592324.2020.1853384

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar