Effects of Piriformospora Indica on the Growth and Physiology of Lonicera Japonica Under Drought Stress
Drought stress is one of the key factors constraining the production of Lonicera japonica.To ex-plore the influence of the symbiosis between Piriformospora indica and the root system of L.japonica on its drought resistance capacity,with L.japonica cuttings and P.indica as materials,a two-factor ex-perimental design involving drought stress(normal water supply,moderate drought,and severe drought)and P.indica was implemented.Indicators such as the growth and physiology of L.japonica,as well as the colonization of P.indica under drought stress,were examined.The growth and physiological re-sponse of L.japonica under drought stress were probed,and the impact of P.indica on the drought re-sistance of L.japonica was comprehensively assessed.The results revealed that P.indica established a beneficial symbiotic relationship with L.japonica,and the infection rate of P.indica ranged from(20.0±2.9)％to(40.0±5.0)％.Under the three drought stress conditions,the shoot growth increment of L.japonica treated with P.indica was 16.18％,5.78％,and 27.55％higher than that of the control group,respectively,and the branch growth num ber was 40.00％,2.86％,and 41.67％higher than that of the control group,respectively.Under severe drought treatment,the total dry weight,relative water content,peroxidase activity,superoxide dismutase activity and proline content of L.japonica treated by P.indica were all higher than those of the control group.The principal components comprehensive evalu-ation indicated that the drought resistance ranking of L.japonica treated with P.indica was higher than that of the control group under the same drought stress,suggesting that P.indica enhances the drought resistance of L.Japonica.The results provide a theoretical basis for the cultivation and utilization of L.Japonica in arid regions.
万方数据
维普
