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Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings
Ren, Ai-Tian; Zhu, Ying1; Chen, Ying-Long; Ren, Hong-Xu; Li, Ji-Yuan; Abbott, Lynette Kay2,3; Xiong, You-Cai
AbstractInoculation with arbuscular mycorrhizal (AM) fungi can modify stomatal behavior and increase antioxidant enzyme activities and therefore play a pivotal role in plant growth. We hypothesised that inoculation with AM fungi postpones the non-hydraulic root signal and alters physiological and biochemical traits, which enhances drought tolerance and water-use efficiency (WUEB) for plant biomass. Two pot experiments (including progressive soil drying and partial root-zone drying) were conducted to reveal how mycorrhizal colonization altered root signal and its effects on plant growth, biochemical traits and WUEB in maize seedlings in drying soil. In our experiments, inoculation with Funneliformis mosseae improved water absorption and reduced the sensitivity of roots to drought. In addition, it decreased leaf abscisic acid (ABA) content of inoculated plants. Regardless of water conditions, plant biomass production, antioxidant enzyme activity, net photosynthetic rate, stomatal conductance and WUE B were elevated in AM fungal treatments compared to non-AM fungal treatments. Under water-stressed conditions, inoculation with F. mosseae greatly reduced leaf ABA content, and postponed the decline in photosynthetic rate, stomatal conductance and osmotic adjustment. Malondialdehyde (MDA) level was significantly lower in mycorrhizal plants than in non-inoculation plants. However, inoculation with F. mosseae increased antioxidant enzyme activities including peroxidase (POD) and superoxide dismutase (SOD). In this study, inoculation with F. mosseae reduced ABA accumulation that acts as a non-hydraulic root signal and thereby postponed a decline in stomatal conductance and photosynthetic rate, improved water use efficiency and antioxidant enzymes activities, and accordingly reduced proline and MDA content. Thus, inoculation with AM fungi played a role in effective defense for better drought acclimation in water-stressed maize seedlings.
KeywordArbuscular mycorrhizal symbiosis Drought tolerance Stomatal conductance Non-hydraulic signals Antioxidant enzymes
Subject AreaPlant Sciences ; Environmental Sciences
Indexed BySCI
WOS Research AreaPlant Sciences ; Environmental Sciences & Ecology
WOS IDWOS:000487174700007
Publication PlaceOXFORD
Funding OrganizationNatural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31570415] ; State Technology Support Program [2015BAD22B04] ; National Specialized Support Plan for Outstanding Talents (Ten Thousand People Plan), Overseas Masters Program of Ministry of Education [Ms2011LZDX059] ; Basic Research Innovation Group Project of Gansu Province [1606RJIA325] ; Innovation Team Project of Gansu Academy of Sciences [2019CX004-01] ; Science and Technology Plan Funding of Gansu Province [18JR3RA254] ; Project Open Program of Chinese National Key Laboratory of Forest Genetics and Breeding [TGB2018001] ; Application Development Project of Gansu Province [2018JK-15] ; Chinese Academy of Sciences Western Light
Corresponding Author Emailxiongyc@lzu.edu.cn
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Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Lanzhou Univ, Sch Life Sci, Inst Arid Agroecol, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China
2.Gansu Acad Sci, Inst Biol, Key Lab Microbial Resources Exploitat & Applicat, Lanzhou 730000, Gansu, Peoples R China
3.Univ Western Australia, UWA Sch Agr & Environm, Perth, WA, Australia
4.Univ Western Australia, Inst Agr, Perth, WA, Australia
5.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China
Recommended Citation
GB/T 7714
Ren, Ai-Tian,Zhu, Ying,Chen, Ying-Long,et al. Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2019,167.
APA Ren, Ai-Tian.,Zhu, Ying.,Chen, Ying-Long.,Ren, Hong-Xu.,Li, Ji-Yuan.,...&Xiong, You-Cai.(2019).Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,167.
MLA Ren, Ai-Tian,et al."Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 167(2019).
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