Tomato plant growth promotion and drought tolerance conferred by three arbuscular mycorrhizal fungi is mediated by lipid metabolism

被引：19

作者：

Zhang, Wei ^{[1
]}

Xia, Kaili ^{[1
,2
]}

Feng, Zengwei ^{[2
]}

Qin, Yongqiang ^{[2
]}

Zhou, Yang ^{[2
]}

Feng, Guangda ^{[2
]}

Zhu, Honghui ^{[2
,4
]}

Yao, Qing ^{[1
,3
]}

机构：

[1] South China Agr Univ, Coll Hort, Guangdong Engn Res Ctr Litchi, Key Lab Biol & Genet Improvement Hort Crops South, Guangzhou, Peoples R China

[2] Guangdong Acad Sci, Inst Microbiol, State Key Lab Appl Microbiol Southern China, Key Lab Agr Microbiom & Precis Applicat MARA,Guang, Guangzhou, Peoples R China

[3] South China Agr Univ, Coll Hort, Guangzhou 510642, Peoples R China

[4] Guangdong Acad Sci, Inst Microbiol, Guangzhou 510070, Peoples R China

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2024年 / 208卷

关键词：

Fatty acid profile; Fungal lipid consumption; Funneliformis mosseae; Mycorrhizal response; Rhizophagus irregularis; Rhizophagus intraradices; Water stress; FATTY-ACID-COMPOSITION; ROOTS; ACCUMULATION; DEPENDENCY; PHOSPHORUS; STRESS; HYPHAE;

D O I：

10.1016/j.plaphy.2024.108478

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Arbuscular mycorrhizal fungi (AMF) can promote plant growth and enhance plant drought tolerance with varying effect size among different fungal species. However, the linkage between the variation and the lipid metabolism, which is exclusively derived from plants, has been little explored thus far. Here, we established AM symbiosis between tomato (Solanum lycopersicum) plants and three AMF species (Rhizophagus intraradices, Funneliformis mosseae, Rhizophagus irregularis) under well watered (WW) or drought stressed (DS) conditions in pot experiment. The plant biomass, chlorophyll fluorescence Fv/Fm, shoot P content and mycorrhizal colonization were determined. Meanwhile, fatty acid (FA) profiles and relative expression of genes encoding for nutrition exchange (SlPT4, SlPT5, RAM2, STR/STR2) in roots were also monitored. DS significantly decreased plant biomass while AMF significantly increased it, with three fungal species varying in their growth promoting capacity and drought tolerance capacity. The growth promoting effect of R. irregularis was lower than those of R. intraradices and F. mosseae, and was associated with higher mycorrhizal colonization and more consumption of lipids. However, the drought tolerance capacity of R. irregularis was greater than those of R. intraradices and F. mosseae, and was associated with less decrease in mycorrhizal colonization and lipid content. We also found that AMF mediated plant drought tolerance via regulating both AM specific FAs and non-AM specific FAs in a complementary manner. These data suggest that lipid metabolism in AM plays a crucial role in plant drought tolerance mediated by AMF.

引用

页数：11