| Abstract: In order to explore a new way of substrate cultivation of colorful pepper in greenhouse with high effi ciency and long season in southern China, the effect of root irrigation treatment with HRW on stress resistance, yield and quality of colorful pepper were analyzed under high temperature condition in southern China with colorful pepper cultivar 'Ganduoer' as material. The results showed that compared with the CK, HRW treatment signifi cantly reduced the content of MDA in leaves and roots, and signifi cantly increased the activities of SOD, CAT, POD, APX and the content of Pro, and improved the anti-stress ability of colorful pepper. The yield was increased by 17.73% compared with the CK, the quality was signifi cantly improved, and VC contents was extremely and signifi cantly increased by 43.52%, and the content of soluble solids, soluble protein and total phenol were signifi cantly increased by 5.46%, 7.85% and 10.61%, respectively, and contents of soluble sugar, crude fi ber and carotenoid were also increased. It showed that under stress of high temperature,
HRW treatment could effectively reduce the degree of plasma membrane oxidation of the cell, maintain the
stability of the cell membrane, and remove the reactive oxygen species by improving the antioxidant enzyme
activities in plant, improve the accumulation of osmotic regulation substances to slow down their received
damage, enhance plant resistance, so as to improve the yield and quality of colorful pepper. |