Arsenic induced eco-physiological changes in Chickpea (Cicer arietinum) and protection by gypsum, a source of sulphur and calcium
Arsenic induced eco-physiological changes in Chickpea (Cicer arietinum) and protection by gypsum, a source of sulphur and calcium
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DOI：
10.1016/j.scienta.2017.02.007
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发表时间：
2017-03-15
影响因子：
4.3
通讯作者：
Qureshi, Mohammad Irfan
中科院分区：
文献类型：
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作者：
Al-Huqail, Arwa A.;AL-Rashed, Sarah A.;Qureshi, Mohammad Irfan
由于非生物压力对植物健康的不利影响，粮食产量低，世界粮食安全受到威胁。包括砷（As）在内的类金属干扰植物的生长和代谢。近年来，由于砷在环境中的浓度迅速增加，已成为动植物健康的严重威胁。以鹰嘴豆（Cicer arietinum）为材料，研究了硫源（23.3%）和钙源（18.6%）石膏（CaSO_4中心点2 H（2）O）对砷胁迫的影响。在含有150 g SoilriteTM的盆中培养植物，所述SoilriteTM具有以下1%（w/w）石膏和As（50 ppm）的组合：对照、砷（As）、1%石膏和1%石膏+50 ppm As。15天大的植物进行治疗和几个理化参数进行了研究，在两个不同的时间间隔（治疗后10和20天，DAT）。砷被发现增加氧化应激，石膏的存在下较少。砷处理降低了SOD，GR，APX和CAT的活性，但在石膏的存在下，注意到增加，除了CAT。石膏大大帮助植物获得更高水平的脯氨酸，抗坏血酸，谷胱甘肽，非蛋白硫醇和植物螯合素。更重要的是，石膏有助于维持细胞的氧化还原过程中的压力。生物量的积累也提高了石膏的存在。因此，很明显，硫和钙源（石膏）可能发挥间接作用（减少植物As吸收）或直接作用（通过加强细胞防御），这可能是通过上调S-防御途径（谷胱甘肽，植物螯合素和非蛋白硫醇）保护免受As。(C)2017爱思唯尔B. V.保留所有权利。
World food security is threatened by low production of food grains due to adverse impacts of abiotic stressors on plant health. Metalloids, including arsenic (As), interfere with plant growth and metabolism. In recent past, As has emerged as a severe threat to animal and plant health due to its rapidly increasing concentration in the environment. The influence of gypsum (calcium sulphate, CaSO4 center dot 2H(2)O), a sulphur (23.3%) and calcium (18.6%) source, on As-induced stress was studied in chickpea gram (Cicer arietinum). Plants were raised in pots containing 150g Soilrite (TM) with following combinations of 1% (w/w) gypsum and As (50 ppm): Control, Arsenic (As), 1% gypsum and 1% gypsum + 50 ppm As. Fifteen-days-old plants were subjected to treatments and several physiochemical parameters were studied at two different time intervals (10 and 20 days after treatment, DAT). Arsenic was found to increase oxidative stress, lesser in presence of gypsum. Arsenic treatment decreased activities of SOD, GR, APX and CAT but an increase was noted in the presence of gypsum, except CAT. Gypsum greatly helped plants in acquiring higher levels of proline, ascorbate, glutathione, non-protein thiols and phytochelatins. More importantly, gypsum helped in maintenance of cellular redox during As stress. Biomass accumulation was also improved in presence of gypsum. Hence, it is clear that sulphur and calcium source (gypsum) might play either an indirect role (reducing plant As uptake) or a direct role (by strengthening the cellular defence) that might be through upregulation of S-defence pathway (glutathione, phytochelatins and non-protein thiols) for protection against As. (C) 2017 Elsevier B.V. All rights reserved.