title: Model analysing the antioxidant responses of leaves and roots of switchgrass to NaCl-salinity stress.
abstract: 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.
authors.affiliation: Department of Grassland Science, College of Animal Science and Technology, Northwest A&F University, Yangling 712100, Shaanxi Province, PR China. wangquanzhen191@163.com
authors.forename: Quanzhen
authors.initials: Q
authors.lastname: Wang
authors.forename: Chunhui
authors.initials: C
authors.lastname: Wu
authors.forename: Bao
authors.initials: B
authors.lastname: Xie
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Jian
authors.initials: J
authors.lastname: Cui
authors.forename: Guo
authors.initials: G
authors.lastname: Chen
authors.forename: Yunwei
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D015227:Lipid Peroxidation / Q000187:drug effects; D008954:Models, Biological; D008897:Panicum / Q000187:drug effects / Q000378:metabolism*; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism*; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism*; D055049:Salt Tolerance; D012965:Sodium Chloride / Q000494:pharmacology*; D013312:Stress, Physiological
chemical_list: D000975:Antioxidants; D012965:Sodium Chloride