Moringa leaf extract as biostimulant improves water use efficiency, physio-biochemical attributes of squash plants under deficit irrigation
Moringa leaf extract as biostimulant improves water use efficiency, physio-biochemical attributes of squash plants under deficit irrigation
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DOI：
10.1016/j.agwat.2017.08.004
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发表时间：
2017-11-01
影响因子：
6.7
通讯作者：
Rady, Mostafa M.
中科院分区：
文献类型：
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作者：
Abd El-Mageed, Taia A.;Semida, Wael M.;Rady, Mostafa M.
天然植物生长生物刺激剂目前广泛用于植物在正常和不利条件下的生长。南瓜(Cucurbita Pepo L)是一种重要的蔬菜作物，受盐分和干旱胁迫的严重影响，在世界范围内具有很高的经济地位。本研究旨在评价辣木叶提取物(MLE)作为一种新型的天然植物生长刺激剂在提高南瓜耐盐碱胁迫下的抗旱性方面的作用。在2016年夏秋两季，叶面喷施MLE(3%)，用于全灌(100%ETC)或亏缺灌溉(DI；ETC的80%或60%)。研究了MLE对DI胁迫下南瓜生长、产量性状和水分利用效率(WUE)、生理生化特性及叶片解剖的影响。MLE处理植株的生长和产量特性、收获指数(HI)、NUE、叶绿素荧光(FVF、T和PI)、光合色素、可溶性糖和游离脯氨酸、叶片解剖、相对含水量(RWC%)和膜稳定指数(MSI%)均高于MLE处理植株，而电解质渗漏率(EL%)低于MLE处理植株。3%MLE通过维持较高的相对含水率、水分利用效率、渗透保护剂和较低的EL值，有效地缓解了南瓜植株的干旱伤害。(C)2017爱思唯尔B.V.保留所有权利。
Natural plant growth biostimulants are intensively used nowadays for plant growing in normal and adverse conditions. Severely affected by salt and drought stresses, squash (Cucurbita pepo L) is an important vegetable crop that highly ranked in economic importance worldwide. The current study aimed to evaluate whether leaf extract of Moringa oleifera (MLE), as a novel natural biostimulant for plant growth, could play a role in improving drought tolerance in squash plants under saline condition. In summer and fall seasons of 2016, MLE (3%) was foliar sprayed for plants under full (100% of ETc) or deficit irrigation (DI; 80 or 60% of ETc). The effect of MLE on the growth, yield characteristics and water use efficiency (WUE), physio-biochemical attributes, and leaf anatomy of squash plants exposed to DI stress was assessed. MLE-treated plants exposed to DI had higher growth and yield characteristics, harvest index (HI)NUE, chlorophyll fluorescence (FVF,T, and PI), photosynthetic pigments, soluble sugars and free proline, leaf anatomy, relative water content (RWC%) and membrane stability index (MSI%) and had lower electrolyte leakage (EL%) compared to MLE-untreated plants. Application of 3% MLE was effective in alleviating damages of drought stresses in squash plants by maintaining higher RWC, WUE, and osmoprotectants, and lower EL. (C) 2017 Elsevier B.V. All rights reserved.