Establishment of Piriformospora indica-peanut symbiosis system and its promoting effect on peanut growth
To improve peanut yield,growth-promoting effect of endophytic fungus Piriformospora indica on peanut plants was investigated in pots.Peanut cv.Yueyou 7 was used as experimental material.Symbiosis system between P.indica and peanut was established.Agronomic traits,yield,photosynthetic characteristics,malondialde-hyde content,root activity and antioxidant enzyme activity of peanut were studied.Results showed that the symbio-sis system of P.indica and peanut was established successfully by inoculating P.indica with hyphae.The infection rate was 63%.At seedling stage,net photosynthetic rate and chlorophyll SPAD value of peanut leaves were signifi-cantly increased by 24.17%and 19.66%,and transpiration rate was 22%lower than that of uninoculated peanut plants.At seedling and mature stages,compared with uninoculated P.indica,root length,underground fresh weight,underground dry weight,root activity and leaf catalase peroxidase activity were significantly increased after inocula-tion.Content of malondialdehyde was significantly reduced by 24.27%and 22.12%at seedling and mature stages.Peanut yield was increased by inoculation with P.indica.
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