Changes of physiological indexes and expression of stress resistance related genes in ramie under drought stress
To study the effects of drought stress on physiological characteristics and stress resistance related genes of ramie(Boehme-ria nivea L.),the physiological indexes,stress resistance related gene expression and agronomic traits of Huazhu No.4 were measured by natural drought stress.The results showed that,compared with the control,the chlorophyll SPAD of ramie leaves decreased under drought stress,the relative conductivity,free proline content,malondialdehyde content and soluble sugar content of stem tip and leaves increased significantly(P<0.05),the activities of superoxide dismutase(SOD),catalase(CAT)and peroxidase(POD)in-creased,and the relative expression levels of stress-related genes BnP5CS1,BnWRKY1,BnACO1,Bn-α-amylase,BnAPX1,Bn-bZIP1,BnDREB19 and BnGR1 were increased.The relative expressions of BnP5CS1 and BnWRKY1 in leaves were increased 5.1 and 5.3 times compared with control.Compared with the control,the plant height,stem diameter,skin thickness,fresh aboveground weight and raw hemp weight per plant under drought stress were significantly decreased(P<0.05),the stem diameter and skin thick-ness were decreased by 0.13 cm and 0.14 mm,respectively,and the fresh aboveground weight and raw hemp weight per plant were de-creased by 52.05%and 39.53%,respectively.
万方数据
维普
