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首页> 外文期刊>Plant and Soil >Silicon-mediated changes of some physiological and enzymatic parameters symptomatic for oxidative stress in spinach and tomato grown in sodic-B toxic soil
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Silicon-mediated changes of some physiological and enzymatic parameters symptomatic for oxidative stress in spinach and tomato grown in sodic-B toxic soil

机译：硅介导的B型有毒土壤中菠菜和番茄氧化应激的一些生理和酶学参数的变化

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We investigated effect of silicon (Si) on the growth, uptake of sodium (Na), chloride (Cl), boron (B), stomatal resistance (SR), lipid peroxidation (MDA), membrane permeability (MP), lipoxygenase (LOX) activity, proline (PRO) accumulation, H2O2 accumulation, non-enzymatic antioxidant activity (AA) and the activities of major antioxidant enzymes (superoxide dismutase, SOD; catalase, CAT and ascorbate peroxidase, APX) of spinach and tomato grown in sodic-B toxic soil. Si applied to the sodic-B toxic soil at 2.5 and 5.0 mM concentrations significantly increased the Si concentration in the plant species and counteracted the deleterious effects of high concentrations of Na, Cl and B on root and shoot growth by lowering the accumulation of these elements in the plants. Stomatal resistance, MP, MDA and the concentrations of H2O2 and PRO were higher in the plants grown in sodic-B toxic soil without Si: LOX activity of excised leaves of both species was increased by Si. Antioxidant activities of both species were significantly affected by Si, with the activities of SOD, CAT and APX decreased and AA increased by applied Si. For most of the parameters measured, it was found that 5 mM Si was more effective than the 2.5 mM Si. Based on the present work, it can be concluded that Si alleviates sodicity and B toxicity of the plants grown in sodic-B toxic soil by preventing both oxidative membrane damage and also translocation of Na, Cl and B from root to shoots and/or soil to plant, and lowering the phytotoxic effects of Na, Cl and B within plant tissues. It was concluded that tomato was more responsive to Si than spinach since it was more salt sensitive than spinach. To our knowledge, this is the first report that Si improves the combined salt and B tolerance of spinach and tomato grown in naturally sodic-B toxic soil, and which describes membrane-related parameters and antioxidant responses.
机译：我们研究了硅（Si）对生长，吸收钠（Na），氯化物（Cl），硼（B），气孔抗性（SR），脂质过氧化（MDA），膜通透性（MP），脂氧合酶（LOX）的影响）活性，脯氨酸（PRO）积累，H2 O2 积累，非酶抗氧化活性（AA）以及主要抗氧化酶（超氧化物歧化酶，SOD，过氧化氢酶，CAT和抗坏血酸过氧化物酶，APX）的活性）菠菜和番茄生长在B级有毒土壤中。在浓度为2.5和5.0 mM的Sodic-B毒性土壤上施用Si可以显着提高植物物种中的Si浓度，并通过降低这些元素的积累来抵消高浓度的Na，Cl和B对根和芽生长的有害影响。在植物中。在没有Si的Sodium-B毒土上生长的植物中，气孔抗性，MP，MDA和H2 O2 和PRO的浓度均较高：两种物种的离体叶片的LOX活性均通过Si增加。硅对两种物种的抗氧化活性都有显着影响，施用硅对SOD，CAT和APX的活性降低，而AA的活性升高。对于所测量的大多数参数，发现5 mM Si比2.5 mM Si更有效。根据目前的工作，可以得出结论，硅通过防止氧化膜损伤以及Na，Cl和B从根到芽和/或土壤的转运，减轻了在Sodium-B毒性土壤中生长的植物的Sosotic和B毒性。可以降低植物组织中Na，Cl和B的植物毒性作用。结论是，番茄对Si的反应比菠菜更具响应性，因为它比菠菜对盐分更为敏感。据我们所知，这是第一个关于Si改善天然B毒土壤中菠菜和番茄对盐和B的综合耐受性的报道，它描述了膜相关参数和抗氧化反应。

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