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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Mitigation effects of glycinebetaine on oxidative stress and some key growth parameters of maize exposed to salt stress
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Mitigation effects of glycinebetaine on oxidative stress and some key growth parameters of maize exposed to salt stress

机译：甜菜碱对盐胁迫下玉米的氧化胁迫及一些关键生长参数的缓解作用

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The aim of the current study was to investigate the effects of glycinebetaine (GB) on oxidative stress and some key growth parameters in maize (Zea mays L. 'DK 647 FT) grown under saline conditions. Maize seedlings were grown in pots containing perlite. The experiment was designed in a 2 x 2 factorial arrangement with 2 levels (0 and 100 mM) of sodium chloride (NaCl) and 2 levels (25 and 50 mM) of GB sprayed onto leaves of maize seedlings. Saline stress caused a considerable decline in total dry matter, chlorophyll content, relative water content (RWC), peroxidase (POD; EC. 1.11.1.7), and catalase (CAT; EC. 1.11.1.6); however, it increased proline, polyphenol oxidase (PPO; 1.10.3.1), and electrolyte leakage. Foliar application of both GB doses mitigated the deleterious effects of salinity stress to variable extents on the key growth parameters tested. As expected, sodium (Na~+) concentrations were higher in the tissues of plants grown under saline conditions, and the GB treatments significantly reduced Na~+ concentration in the plant tissues. Salinity stress reduced both calcium (Ca~(2+)) and potassium (K~+) in the leaves, and GB treatments increased concentrations of both elements in plant tissues; however, their levels were still lower than control values. In particular, foliar application of 50 mM GB mitigated some of the deleterious effects of salt stress by improving proline, Ca~(2+, and K~+ levels and maintaining membrane permeability.
机译：本研究的目的是研究甘氨酸甜菜碱（GB）对在盐条件下生长的玉米（Zea mays L.'DK 647 FT）的氧化应激和一些关键生长参数的影响。玉米幼苗在装有珍珠岩的花盆中生长。实验设计为2 x 2分解布置，将2个水平（0和100 mM）的氯化钠（NaCl）和2个水平（25和50 mM）的GB喷到玉米幼苗的叶子上。盐胁迫导致总干物质，叶绿素含量，相对水含量（RWC），过氧化物酶（POD; EC 1.11.1.7）和过氧化氢酶（CAT; EC 1.11.1.6）的显着下降。但是，它增加了脯氨酸，多酚氧化酶（PPO; 1.10.3.1）和电解质的泄漏。两种GB剂量的叶面施用在不同程度上减轻了盐分胁迫对测试的关键生长参数的有害影响。不出所料，在盐条件下生长的植物组织中钠（Na〜+）浓度较高，GB处理显着降低了植物组织中的Na〜+浓度。盐胁迫降低了叶片中的钙（Ca〜（2+））和钾（K〜+），GB处理增加了植物组织中这两种元素的浓度。但是，它们的水平仍低于对照值。特别地，通过提高脯氨酸，Ca〜（2+和K〜+含量）并维持膜通透性，叶面施用50 mM GB可以减轻盐胁迫的某些有害影响。

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