一氧化氮保护盐胁迫下印度芥菜光合能力的抑制

M. Fatma, N. Khan
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引用次数: 36

摘要

研究了氮氧化物(NO)单独或联合施用对芥菜(Brassica juncea L.) 100mm NaCl胁迫的缓解作用。盐度一般会降低光合作用和生长特性。在50 μM和100 μM浓度下单独施用NO可促进和促进光合效率和生长,但在盐胁迫下,施用100 μM NO比施用50 μM NO更有效地通过限制NaCl离子含量的积累和降低氧化应激来缓解盐胁迫。然而,高浓度(150 μM) NO在100 mM NaCl存在下表现出抑制效果。综上所述,100 μM的NO处理可以通过降低叶绿素降解或提高PS II效率、rubisco活性和净光合作用来缓解盐胁迫下的光合作用下降。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nitric Oxide Protects Photosynthetic Capacity Inhibition by Salinity in Indian Mustard
The potential of nitric oxide (NO) was studied individually or in combination for the alleviation of 100 mM NaCl stress in mustard (Brassica juncea L.). Salinity generally decreased photosynthesis and growth characteristics. The individual application of NO at 50 μM and 100 μM promoted and enhanced the photosynthetic efficiency and growth, but under salinity stress the application of 100 μM NO was proved more efficacious than 50 μM in alleviating salt stress by limiting the accumulation of NaCl content of ions and reducing oxidative stress. However, application of high (150 μM) concentrations of NO showed inhibitory results in the presence of 100 mM NaCl. These results indicated that the application of NO at 100 μM alleviates the salt-induced decrease in photosynthesis mainly through decreasing chlorophyll degradation or by increasing PS II efficiency, rubisco activity and net photosynthesis along with growth.
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