Study on the Effect of Sooty Mould Disease in Tea Plants
Renjian Liu,
Hongmei Liu,
Yuyuan Wang,
Jiahao Chen,
Zihao Qiu,
Yanchun Zheng,
Binmei Sun,
Xindong Tan,
Canwei Shu,
Shaoqun Liu,
Peng Zheng
Affiliations
Renjian Liu
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Hongmei Liu
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Yuyuan Wang
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Jiahao Chen
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Zihao Qiu
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Yanchun Zheng
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Binmei Sun
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Xindong Tan
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Canwei Shu
Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
Shaoqun Liu
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Peng Zheng
Department of Tea, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
Sooty mould (SM) disease affects the growth, development and metabolism of plants and reduces the commodity and economic value of crops. SM disease is one of the important leaf diseases in tea plants. Nonetheless, studies on the effect of SM disease in tea plants are rare. Herein, we found that SM disease disrupted the cell morphology and structure and reduced the contents of caffeine, theanine, and catechins in the mature leaves of tea plants. Transcriptome analysis revealed that SM disease inhibited the biosynthesis of lignin, chlorophyll, catechin, caffeine, and theanine and affected the plant-pathogen interactions in the mature leaves of tea plants by downregulating gene expression. In addition, two fungal isolates, MTzyqA and MTzyqB, were obtained from the mature leaves of diseased tea plants. These strains were identified as Cladosporium pseudocladosporioides by mulitgene phylogenetic analysis, and they grew epiphytically on the leaves of tea plants. The biocontrol bacteria JT68, ZGT5, and BX1 had obvious inhibitory effect on MTzyqA and MTzyqB. These results provide a basis for understanding the effect of SM disease in tea plants.
