Impact of Heavy Metals on Physiological Processes of Plants: With Special Reference to Photosynthetic System
Impact of Heavy Metals on Physiological Processes of Plants: With Special Reference to Photosynthetic System
复制标题
DOI：
10.1007/978-981-10-2860-1_6
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
R. Rai;M. Agrawal;S. B. Agrawal
中科院分区：
文献类型：
--
作者：
R. Rai;M. Agrawal;S. B. Agrawal
重金属污染是含重金属的危险化学品不加控制地排放造成的重大环境问题之一。重金属通过影响其最重要的过程，即光合作用，来影响农业用地和植物的生产力。植物暴露于重金属环境中会产生活性氧，很少有重金属直接参与电子传递。它还导致脂质过氧化，破坏植物的细胞膜及其相关的细胞器。叶绿素的生物合成受到重金属的影响，因为重金属取代了叶绿素中的Mg离子。少数重金属还影响叶绿素生物合成的酶，在光反应中干扰电子传递，在暗反应中影响各种酶。这些详细的信息有助于我们了解重金属对影响植物生物量和生产力的生理反应的影响机制，这是农业关注的问题。因此，本章包含了重金属对光合色素、光合装置以及光暗反应的影响的全部信息。
Heavy metal pollution is one of the major environmental problems which is caused by unchecked and uncontrolled discharge of hazardous chemicals consisting of heavy metals. Heavy metals affect agricultural land and plant’s productivity by affecting its most vital process, i.e., photosynthesis. Exposure of plants to heavy metals leads to generation of ROS, and few heavy metals are directly involved in electron transport. It also leads to lipid peroxidation destroying plant’s cell membrane and its associated organelles. Chlorophyll biosynthesis is affected by heavy metals as it substitutes Mg ion from chlorophyll. Few heavy metals also affect enzyme involved in chlorophyll biosynthesis as well as disturb electron transport in light reactions and affect various enzymes in dark reactions. This detailed information helps us to understand the mechanism linked with the impact of heavy metals on physiological responses affecting plant biomass and productivity which is of concern for agriculture. Therefore, the present chapter consists of whole information regarding the impact of heavy metals on photosynthetic pigments, photosynthetic apparatus, and light and dark reactions.