Endophytic <i>Streptomyces hygroscopicus</i> OsiSh-2-Mediated Balancing between Growth and Disease Resistance in Host Rice
Yan Gao, Qing Ning, Yuanzhu Yang, Ying Liu, Shuqi Niu, Xiaochun Hu, Huairong Pan, Zhigang Bu, Ning Chen, Jinyou Guo, Jinlan Yu, Lidan Cao, Peng Qin, Junjie Xing, Bin Liu, Xuanming Liu, Yonghua Zhu
Abstract
Under disease stress, activation of defense response in plants often comes with the cost of a reduction in growth and yield, which is referred as the growth-defense trade-off. The microorganisms which can be recruited by plants to mitigate the growth-defense trade-off are of great value in crop breeding. Here, we reported a rice endophytic actinomycetes Streptomyces hygroscopicus OsiSh-2, which can improve host performances on resistance to rice blast while still sustaining high yield in the 4-year field trials. The proteomic, physiological, and transcriptional profiling data offer insights into the molecular basis underlying the balancing between defense and growth in OsiSh-2-rice symbiont. The findings provide an example for the endophyte-mediated modulation of growth-defense trade-offs in plants and indicated the promising application of endophytic actinobacterial strains in agriculture to breed "microbe-optimized crops."