Department of Grassland Science, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi Province, PR China.
Plant Physiol Biochem. 2012 Sep;58:288-96. doi: 10.1016/j.plaphy.2012.06.021. Epub 2012 Jul 5.
Salinity is a major environmental stress and a substantial constraint on plant production. The objective of this research was to better understand the mechanisms of the antioxidant responses of leaves and roots to NaCl-salinity stress in switchgrass (Panicum virgatum L.). The effects of NaCl-salinity stress (1, 3, 5, 10 and 15gNaCl/kgdrysoil) on lipid peroxidation and antioxidant defences in switchgrass leaves and roots were investigated, and a model analysis was conducted. The results of the correlation analyses indicated that CAT, POD and SOD were more important than APX, GSH and MDA, whereas the model analyses suggested that the latter three biochemical indices were more sensitive than the former three indices to NaCl-salinity in switchgrass. The connective models of APX, GSH, MDA, CAT, SOD and POD between leaves and roots were obtained, respectively. The new models can be used to closely predict the biochemical index values in switchgrass roots or leaves.
盐度是一种主要的环境胁迫因素，对植物的生产有很大的限制。本研究的目的是更好地了解柳枝稷（Panicum virgatum L.）叶片和根系对 NaCl 盐胁迫的抗氧化响应机制。研究了 NaCl 盐胁迫（1、3、5、10 和 15gNaCl/kg干土）对柳枝稷叶片和根系脂质过氧化和抗氧化防御的影响，并进行了模型分析。相关分析结果表明，CAT、POD 和 SOD 比 APX、GSH 和 MDA 更重要，而模型分析表明，后三种生化指标对柳枝稷的 NaCl 盐胁迫比前三种指标更敏感。分别获得了叶片和根系之间 APX、GSH、MDA、CAT、SOD 和 POD 的连接模型。这些新模型可用于准确预测柳枝稷根系或叶片中的生化指标值。
