文章基本信息

标题：PHYSIOLOGICAL AND MOLECULAR EVALUATION OF THE EFFECTS OF SPERMIDINE AND L-METHIONINE ON CADMIUM-STRESSED TOMATO (SOLANUML YCOPERSICUM L. MILL)
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作者：Ibrahim A Alaraidh ; Mutahhar Y Al-Khaishany ; Abdulaziz A Alsahli 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2019
卷号：28
期号：8
页码：6215-6223
语种：English
出版社：PSP Publishing
摘要：Cadmium (Cd) is a harmful metal in the environment that readily enters the food chain when taken up by plants, thus posing a serious threat to human health. In this study, we conducted pot trials to investigate the effects of spermidine (Spd) and L-me- thionine (Met) on mitigation of Cd-induced toxicity in tomato (Solanum lycopersicum L. Mill.) by using physiological traits and inter-simple sequence repeat markers. The results showed that plants exposed to Cd had reduced photosynthetic pigments (chlorophyll a and b and carotenoids). Furthermore, the level of hydrogen peroxide (H_2O_2) was significantly increased by Cd exposure, which in turn elevated plant malondialdehyde and proline content and caused genotoxicity (increased DNA damage and reduced RNA synthesis). However, the application of Spd and Met was found to alleviate Cd toxicity in tomato plants by reducing the content of H_2O_2 and malondialdehyde, increasing the concentrations of chlorophyll a and b, carotenoids, and proline, and decreasing genotoxicity. Therefore, application of Spd and Met appears to enhance plant defense mechanisms against Cd toxicity and alleviates the negative effects of Cd stress in S. lycopersicum through modification of osmolytes.
关键词：Cadmium toxicity;Tomato;Spermidine;L-Methionine;Physiological trait;ISSR