Potential of exogenously sourced kinetin in protecting Solanum lycopersicum from NaCl-induced oxidative stress through up-regulation of the antioxidant system, ascorbate-glutathione cycle and glyoxalase system.
Potential of exogenously sourced kinetin in protecting Solanum lycopersicum from NaCl-induced oxidative stress through up-regulation of the antioxidant system, ascorbate-glutathione cycle and glyoxalase system.
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DOI：
10.1371/journal.pone.0202175
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发表时间：
2018
期刊：
影响因子：
3.7
通讯作者：
Ahmad P
中科院分区：
文献类型：
--
作者：
Ahanger MA;Alyemeni MN;Wijaya L;Alamri SA;Alam P;Ashraf M;Ahmad P
研究了外源施加细胞分裂素（10 μM KN）对番茄茄（Solanum lycopersicum） 150 mM nacl胁迫的保护作用。KN的施用显著促进了正常生长（非胁迫）植株的生长和生物量产量，并在很大程度上减轻了NaCl对胁迫植株的不利影响。其中，叶绿素和类胡萝卜素含量、光合参数、抗氧化系统组分（酶促和非酶促）、渗透积累和矿物质吸收在施用KN后均显著增加。此外，KN的应用减少了活性自由基过氧化氢的产生，同时显著减少了脂质过氧化和增加了膜稳定性。结果表明，NaCl处理提高了植株抗氧化酶和乙氧基化酶系统的活性，KN处理进一步提高了抗氧化酶和乙氧基化酶系统的活性，从而保护番茄葡萄植株免受NaCl诱导的氧化损伤。植物抗氧化系统的进一步增强归因于抗坏血酸-谷胱甘肽循环、酚类和黄酮类化合物的调节。在kn处理的植株中，脯氨酸和甜菜碱的含量显著增加，从而保持了相对含水量。此外，外源KN施用降低了NaCl对K+和Ca2+吸收的抑制作用，导致组织Na+/K+比值显著降低。
The protective role of exogenously applied kinetin (10 μM KN, a cytokinin) against the adverse effects caused by NaCl-induced (150 mM) stress in Solanum lycopersicum was investigated. Application of KN significantly enhanced growth and biomass production of normally grown plants (non-stressed) and also mitigated the adverse effect of NaCl on stressed plants to a considerable extent. Among the examined parameters, chlorophyll and carotenoid contents, photosynthetic parameters, components of the antioxidant system (both enzymatic and non-enzymatic), osmotica accumulation, and mineral uptake exhibited a significant increase following the application of KN. Furthermore, KN application reduced the generation of reactive free radical hydrogen peroxide, coupled with a significant reduction in lipid peroxidation and an increase in membrane stability. The activities of antioxidant enzymes, and glyoxylase system were found to be promoted in plants exposed to NaCl, and the activities were further promoted by KN application, thereby protecting S. lycopersicum plants against NaCl-induced oxidative damage. Further strengthening of the antioxidant system in KN supplied plants was ascribed to regulation of ascorbate-glutathione cycle, phenols and flavonoids in them. The levels of proline and glycine betaine increased considerably in KN-treated plants, thereby maintaining relative water content. Moreover, exogenous KN application reduced the inhibitory effects of NaCl on K+ and Ca2+ uptake, which resulted in a considerable reduction in tissue Na+/K+ ratio.
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影响因子：
6.1
作者：
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