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Inhibition of invasive plant Mikania micrantha rapid growth by host-specific rust (Puccinia spegazzinii)

文献类型： 外文期刊

作者： Zhang, Guangzhong 1 ; Wang, Chenjiaozi 1 ; Ren, Xinghai 1 ; Li, Zaiyuan 1 ; Liu, Conghui 1 ; Qiao, Xi 1 ; Shen, Shicai 4 ; Zhang, Fudou 4 ; Wan, Fanghao 1 ; Liu, Bo 1 ; Qian, Wanqiang 1 ;

作者机构： 1.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Shenzhen Branch, Guangdong Lab Lingnan Modern Agr,Minist Agr & Rura, Shenzhen 518000, Peoples R China

2.Henan Univ, Sch Life Sci, State Key Lab Crop Stress Adaptat & Improvement, Kaifeng 475004, Peoples R China

3.Henan Univ, Shenzhen Res Inst, Shenzhen 518000, Peoples R China

4.Yunnan Acad Agr Sci, Agr Environm & Resource Res Inst, Key Lab Green Prevent & Control Agr Transboundary, Kunming 650205, Peoples R China

期刊名称：PLANT PHYSIOLOGY （ 影响因子：7.4； 五年影响因子：8.7 ）

ISSN： 0032-0889

年卷期： 2023 年 192 卷 2 期

页码：

收录情况： SCI

摘要： Mikania micrantha Kunth is a fast-growing global invasive weed species that causes severe damage to natural ecosystems and very large economic losses of forest and crop production. Although Puccinia spegazzinii can effectively inhibit the growth of M. micrantha and is used as a biological control strain in many countries, the mechanism of inhibiting the growth of M. micrantha is not clear. Here, we used a combination of phenotypic, enzyme activity, transcriptomic, and metabolomic approaches to study the response of M. micrantha after infection by P. spegazzinii. In the early stages of rust infection, jasmonic acid (JA), jasmonoyl-isoleucine (JA-Ile), and salicylic acid (SA) levels in infected leaves were significantly lower than those in uninfected leaves. In teliospore initial and developed stages of P. spegazzinii, JA and JA-Ile levels substantially increased by more than 6 times, which resulted in a significant decrease in the accumulation of defense hormone SA in infected leaves of M. micrantha. The contents of plant growth-promoting hormones were significantly reduced in the infected plants as a result of substantial downregulation of the expression of key genes related to hormone biosynthesis. Furthermore, rust infection led to high levels of reactive oxygen species in chloroplasts and the destruction of chlorophyll structure, which also led to decreased photosynthetic gene expression, net photosynthetic rate, activity of Rubisco, and levels of important organic acids in the Calvin cycle. We hypothesized that after P. spegazzinii infection, JA or JA-Ile accumulation not only inhibited SA levels to promote rust infection and development, but also impeded the rapid growth of M. micrantha by affecting plant growth hormones, carbon, and nitrogen metabolic pathways. Host-specific rust infection promotes JA accumulation not only to inhibit synthesis of the defense hormone SA, but also to affect the growth hormone, carbon, and nitrogen metabolism in Mikania micrantha.

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