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Colonization of endophyte Acremonium sp. D212 in Panax notoginseng and rice mediated by auxin and jasmonic acid
Author(s) -
Han Li,
Zhou Xuan,
Zhao Yiting,
Zhu Shusheng,
Wu Lixia,
He Yunlu,
Ping Xiangrui,
Lu Xinqi,
Huang Wuying,
Qian Jie,
Zhang Lina,
Jiang Xi,
Zhu Dan,
Luo Chongyu,
Li Saijie,
Dong Qian,
Fu Qijing,
Deng Kaiyuan,
Wang Xin,
Wang Lei,
Peng Sheng,
Wu Jinsong,
Li Weimin,
Friml Jiří,
Zhu Youyong,
He Xiahong,
Du Yunlong
Publication year - 2020
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12905
Subject(s) - acremonium , jasmonic acid , endophyte , panax notoginseng , biology , colonization , plant use of endophytic fungi in defense , auxin , botany , microbiology and biotechnology , mutant , biochemistry , salicylic acid , gene , medicine , alternative medicine , pathology
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 μmol/L) and 1‐naphthalenacetic acid (NAA) (10–20 μmol/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.