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ROLE OF ABSCISIC ACID (ABA) IN MODULATING THE RESPONSES OF TWO APPLE ROOTSTOCKS TO DROUGHT STRESS

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dc.contributor.author ZHANG, `LINSEN
dc.contributor.author LI, XUEWEI
dc.contributor.author ZHANG, LIXIN
dc.contributor.author LI, BINGZHI
dc.contributor.author HAN, MINGYU
dc.contributor.author LIU, FUTING
dc.contributor.author ZHENG, PENG
dc.contributor.author ALVA, ASHOK K.
dc.date.accessioned 2023-01-02T10:51:49Z
dc.date.available 2023-01-02T10:51:49Z
dc.date.issued 2014-02-12
dc.identifier.citation Zhang, L., Li, X., Zhang, L., Li, B., Han, M., Liu, F., ... & Alva, A. K. (2014). Role of abscisic acid (ABA) in modulating the responses of two apple rootstocks to drought stress. Pak. J. Bot, 46(1), 117-126. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15481
dc.description.abstract Drought stress is considered as the main limiting factor for apple (Malus domestica L.) production in some semi-arid areas of China. In this study, we investigated the modulation role of abscisic acid (ABA) and fluridone (ABA synthesis inhibitor) on water relations and antioxidant enzyme system in 2-year-old seedlings of two apple rootstocks i.e. Malus sieversii (Ledeb.) Roem. (MS) and Malus hupehensis (Pamp.) Rehd. (MH). Drought stress induced ion leakage, accumulation of malondiadehyde (MDA) and decreases in leaf water potential and relative water content (RWC) in both rootstocks, which were significantly alleviated by xogenous ABA application. Drought stress also induced markedly increases in endogenous ABA content and activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR), monodehydroascorbate reductase (MDHAR), and glutathione reductase (GR), to a greater magnitude in MS as compared to MH rootstock. Concentration of 100μmol/L and 50μmol/L ABA had the most positive effects on drought-stressed rootstocks of MS and MH, respectively. Spraying optimum exogenous ABA contributed to enhancement in most of the above antioxidant enzymes activities but reduction in content of MDA and maintained the appropriate leaf water potential and RWC in both rootstocks. Pretreatment with fluridone aggravated ion leakage and the accumulation of MDA in two apple rootstocks under drought stress, which was overcome by exogenous ABA application to some extent. In conclusion, the endogenous ABA was probably involved in the regulation of two apple rootstocks in responses to drought stress. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society ROLE OF ABSCISIC ACID (ABA) IN MODULATING THE RESPONSES OF TWO APPLE ROOTSTOCKS TO DROUGHT STRESS en_US
dc.title ROLE OF ABSCISIC ACID (ABA) IN MODULATING THE RESPONSES OF TWO APPLE ROOTSTOCKS TO DROUGHT STRESS en_US
dc.type Article en_US


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