Physiological responses of seedling roots of the desert plant Reaumuria soongorica to drought stress
The physiological responses of seedling roots to drought stress were investigated in the desert plant Reaumuria soongorica from two provenances:highly drought resistant (Wuwei) and weakly drought resistant (Lanzhou).Under drought stress,root vigor,relative permeability of plasma (RPP),contents of proline (Pro),soluble sugars (SS),soluble protein (SP),malondialdehyde (MAD) and activities of superoxide dismutase (SOD),peroxidase (POD) and catalase (CAT)were measured with two-year nursery stocks.Grey cor relative analysis was used to analyse drought resistance and its correlation with indexes of roots.Root vigor decreased significantly under drought stress,while RPP and the contents of MDA,Pro,SS and SP,the activities of SOD,POD and CAT of roots increased significantly.Germplasm of highly drought-resistant provenance (Wuwei) was more sensitive to drought stress than germplasm of weakly drought-resistant provenance (Lanzhou).The grey correlative degrees for root vigor,RPP and Pro and drought resistance were greater than 0.9.However,R.soongorica enhanced drought resistance through a wider series of physiological variations,beyond these three.
国家科技期刊平台
NSTL
万方数据
维普
