Role of selenium in mitigation of cadmium toxicity in pepper grown in hydroponic condition
Role of selenium in mitigation of cadmium toxicity in pepper grown in hydroponic condition
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DOI：
10.1080/01904167.2016.1161773
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发表时间：
2017-03
影响因子：
2.1
通讯作者：
Leila Shekari;M. Kamelmanesh;M. Mozafariyan;M. Hasanuzzaman;Farshad Sadeghi
中科院分区：
文献类型：
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作者：
Leila Shekari;M. Kamelmanesh;M. Mozafariyan;M. Hasanuzzaman;Farshad Sadeghi
摘要硒（Se）是人体必需的微量元素，但对植物却不是必需的。然而，它在改善植物生长和胁迫耐受性方面的有益作用是公认的。为了研究硒在辣椒镉毒害中的作用，采用盆栽试验研究了硒对辣椒镉毒害的影响。Suryankhi Cluster），该实验在温室条件下进行。处理包括Cd [0、0.25和0.5 mM氯化镉（CdCl2）]和Se [0、3和7 µM亚硒酸钠（Na2SeO3）]，重复三次。结果表明，Cd胁迫降低了叶绿素a、叶绿素B和类胡萝卜素的含量，而Se的补充减轻了Cd对光合色素的毒害。7 µM的硒显著增加了在0.25 mM Cd条件下生长的植物的叶面积。3 μM硒和0.25 mM镉以及3 μM硒和7 μM硒和0.5 mM镉的应用增加了过氧化氢酶（CAT）的活性。7 µM的硒降低了暴露于0.5 mM Cd（30%）的辣椒叶片的脯氨酸含量。硒显著增强了叶片的抗氧化活性，而镉的毒害则减弱了这种活性。硒对植物生长有一定的促进作用，是辣椒抗氧化酶。Cd胁迫和非胁迫条件下的Suryankhi集群。
ABSTRACT Selenium (Se) is an essential element for humans but is not considered as essential for plants. However, its beneficial role in improving plant growth and stress tolerances is well established. In order to study the role of Se in cadmium (Cd) toxicity in pepper (Capsicum frutescens cv. Suryankhi Cluster), this experiment was carried out in greenhouse conditions. Treatments comprised Cd [0, 0.25, and 0.5 mM cadmium chloride (CdCl2)] and Se [0, 3, and 7 µM sodium selenite (Na2SeO3)] with three replications. The result showed that Cd decreased chlorophyll a, chlorophyll b, and carotenoids, whereas Se supplementation diminished Cd toxicity on photosynthetic pigment. Selenium at 7 µM significantly increased the leaf area in the plants grown at 0.25 mM Cd. The application of Se at 3 µM with 0.25 mM Cd and Se at 3 µM and Se at 7 µM with 0.5 mM Cd increased the activity of catalase (CAT). Selenium at 7 µM decreased the proline content of pepper leaves exposed to Cd at 0.5 mM (30%). Selenium significantly enhanced the antioxidant activity of leaves, which was diminished by Cd toxicity. In general, Se has a beneficial effect on plant growth and is an antioxidant enzyme of pepper cv. Suryankhi Cluster under Cd stress and non-stress conditions.