The regulatory role of gamma-aminobutyric acid in chickpea plants depends on drought tolerance and water scarcity level
文献类型： 外文期刊
作者： Seifikalhor, Maryam 1 ; Niknam, Vahid 1 ; Aliniaeifard, Sasan 3 ; Didaran, Fardad 3 ; Tsaniklidis, Georgios 4 ; Fanourakis, Dimitrios 5 ; Teymoorzadeh, Mahsa 6 ; Mousavi, Seyed Hasan 7 ; Bosacchi, Massimo 8 ; Li, Tao 9 ;
作者机构： 1.Univ Tehran, Coll Sci, Dept Plant Biol, POB 14155-6455, Tehran, Iran
2.Tarbiat Modares Univ, Ctr Excellence Med Plant Metabolites, Tehran, Iran
3.Univ Tehran, Coll Aburaihan, Dept Hort, Tehran, Iran
4.Hellen Agr Org ELGO Dimitra, Inst Olive Tree Subtrop Plants & Viticulture, Kastorias 32A, Iraklion 71307, Greece
5.Hellen Mediterranean Univ, Sch Agr Sci, Dept Agr, Lab Qual & Safety Agr Prod Landscape & Environm, Iraklion 71004, Greece
6.Univ Tehran, Inst Biochem & Biophys, Tehran, Iran
7.Agr Res Educ & Extens Org AREEO, Hort Sci Res Inst, Vegetable Res Ctr, Karaj, Iran
8.KWS Gateway Res Ctr LLC, Danforth Plant Sci Ctr, BRDG, St Louis, MO USA
9.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.996； 五年影响因子：5.516 ）
ISSN： 2045-2322
年卷期： 2022 年 12 卷 1 期
页码：
收录情况： SCI
摘要： gamma-Aminobutyric acid (GABA) is a non-protein amino acid with multifunctional roles in dynamic plant responses. To determine the effects of exogenous GABA application (0, 25 and 50 mu M) on drought response, two chickpea cultivars with contrasting tolerance to water deficit were examined. Plants were exposed to four irrigation levels (irrigation to 100, 60, 40 and 20% field capacity). Water deficit decreased growth, chlorophyll content, and photosynthetic efficiency. It increased electrolyte leakage and lipid peroxidation owing to both higher ROS accumulation and lower antioxidant enzyme activity. These negative effects of water deficit and the alleviating role of GABA application were more prominent in the sensitive, as compared to the tolerant cultivar. Water deficit also increased proline and GABA contents more in the tolerant cultivar, whereas their content was more enhanced by GABA application in the sensitive one. This may confer an additional level of regulation that results in better alleviation of drought damage in tolerant chickpea cultivars. In conclusion, the stimulatory effect of GABA on growth and physiological modulation depends on both the water stress severity and the cultivar sensitivity to it, implying a probable unknown GABA-related mechanism established by tolerant chickpea cultivars; a lost or not gained mechanism in susceptible ones.
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