Colonization of endophyte Acremonium sp. D212 in Panax notoginseng and rice mediated by auxin and jasmonic acid
文献类型： 外文期刊
作者： Han, Li 1 ; Zhou, Xuan 1 ; Zhao, Yiting 1 ; Zhu, Shusheng 1 ; Wu, Lixia 1 ; He, Yunlu 1 ; Ping, Xiangrui 1 ; Lu, Xinqi 1 ; H 1 ;
作者机构： 1.Yunnan Agr Univ, Coll Plant Protect, Kunming 650201, Yunnan, Peoples R China
2.Yunnan Agr Univ, State Key Lab Conservat & Utilizat Bioresources Y, Kunming 650201, Yunnan, Peoples R China
3.Yunnan Agr Univ, Educ Minist China, Key Lab Agrobiodivers & Pest Management, Kunming 650201, Yunnan, Peoples R China
4.Shanxi Acad Agr Sci, Ind Crop Res Inst, Fenyang 032200, Peoples R China
5.Yunnan Agr Univ, Dept Steering Comm, Kunming 650201, Yunnan, Peoples R China
6.Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Wild Plant Resources, Kunming 650201, Yunnan, Peoples R China
7.Mengzi Seed Management Stn, Mengzi 661199, Peoples R China
8.Inst Sci & Technol Austria IST Austria, Klosterneuburg, Austria
9.Southwest Forestry Univ, Coll Hort & Landscape, Kunming 650224, Yunnan, Peoples R China
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 2020影响因子：7.061； 五年影响因子：6.002 ）
ISSN： 1672-9072
收录情况： SCI
摘要： Endophytic fungi can be beneficial to plant growth. However, the molecular mechanisms underlying colonization of Acremonium spp. remain unclear. In this study, a novel endophytic Acremonium strain was isolated from the buds of Panax notoginseng and named Acremonium sp. D212. The Acremonium sp. D212 could colonize the roots of P. notoginseng, enhance the resistance of P. notoginseng to root rot disease, and promote root growth and saponin biosynthesis in P. notoginseng. Acremonium sp. D212 could secrete indole-3-acetic acid (IAA) and jasmonic acid (JA), and inoculation with the fungus increased the endogenous levels of IAA and JA in P. notoginseng. Colonization of the Acremonium sp. D212 in the roots of the rice line Nipponbare was dependent on the concentration of methyl jasmonate (MeJA) (2-15 mu mol/L) and 1-naphthalenacetic acid (NAA) (10-20 mu mol/L). Moreover, the roots of the JA signaling-defective coi1-18 mutant were colonized by Acremonium sp. D212 to a lesser degree than those of the wild-type Nipponbare and miR393b-overexpressing lines, and the colonization was rescued by MeJA but not by NAA. It suggests that the cross-talk between JA signaling and the auxin biosynthetic pathway plays a crucial role in the colonization of Acremonium sp. D212 in host plants.
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