Magnetized Water Confers Drought Stress Tolerance in Moringa Biotype via Modulation of Growth, Gas Exchange, Lipid Peroxidation and Antioxidant Activity
Magnetized Water Confers Drought Stress Tolerance in Moringa Biotype via Modulation of Growth, Gas Exchange, Lipid Peroxidation and Antioxidant Activity
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DOI：
10.15244/pjoes/110347
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发表时间：
2020-01-01
影响因子：
1.8
通讯作者：
Hajar, Abdulrahaman S.
中科院分区：
文献类型：
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作者：
Hasan, Md. Mahadi;Alharby, Hesham F.;Hajar, Abdulrahaman S.
本研究评估了磁化水处理（MWT）下干旱胁迫对辣木生物型的影响。辣木生物型幼苗经受具有不同田间持水量（FC）的干旱胁迫，对照（100%FC）、中度干旱胁迫（MS，50%FC）和重度干旱胁迫（SS，20%FC）。磁化水处理显著增加了干旱胁迫下的株高、叶片数、节间距、叶面积、叶、地上部和根的干重，显著改善了干旱胁迫下的光合作用、蒸腾作用、气孔导度、水分利用效率和水汽压亏缺。MWT处理使暗适应状态下的PSII最大量子效率（Fv/Fm）和最大叶绿素荧光（Fm）增加，最小叶绿素荧光（F-0）降低。干旱胁迫下叶片光合色素（Chla、Chl B、类胡萝卜素）含量显著降低，而分子量显著增加。辣木生物型的MW应用导致在MS和SS条件下，总酚含量（TPC）分别下降了19%和26%。随着干旱时间的延长，叶片中丙二醛（MDA）、过氧化氢（H2 O2）和脯氨酸的积累减少。MW可以通过调节辣木幼苗的生理活性来缓解干旱胁迫，提高其耐旱性。
The present study assesses the effect of drought stress on the Moringa biotype under magnetized water treatment (MWT). The Moringa biotype seedlings were subjected to drought stress with varying field capacities (FC) viz., control (100% FC), moderate drought stress (MS,50% FC), and severe drought stress (SS, 20% FC). Magnetized water (MW) significantly increased plant height, leaflet number, internode distances, leaf area, dry weight of the leaf, shoot, root of the seedlings and markedly improved the assimilation, transpiration, stomatal conductance, water use efficiency and vapor pressure deficit under drought stress conditions. The maximum quantum efficiency of PSII (Fv/Fm) and maximum chlorophyll fluorescence (Fm) were increased and minimum chlorophyll fluorescence (F-0) in the darkadapted state was decreased under drought stress with MWT. Photosynthetic pigments (Chl a, Chl b, carotenoids) significantly decreased under drought stress, but MW significantly increased them. The MW application in Moringa biotype resulted in a decrease in total phenolic content (TPC) by 19% and 26% under MS and SS conditions, respectively. Malondialdehyde(MDA), hydrogen peroxide(H2O2) and accumulation of proline in leaf were decreased with the prolongation of drought with MW. MW could be used for alleviating the drought stress in Moringa biotype seedlings and improve drought tolerance by modulating the physiological activities.