Mycorrhizal roles in plant growth, gas exchange, root morphology, and nutrient uptake of walnuts

Guang-Ming Huang, Ying-Ning Zou, Qiang-Sheng Wu, Yong-Jie Xu and Kamil Kuča
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Guang-Ming Huang: Collegeof Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, P.R. China
Ying-Ning Zou: Collegeof Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, P.R. China
Qiang-Sheng Wu: Collegeof Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, P.R. China
Yong-Jie Xu: Hubei Academy of Forestry, Wuhan, P.R. China
Kamil Kuča: Department of Chemistry, Faculty of Science, University of Hradec Králové, Hradec Králové, Czech Republic

Plant, Soil and Environment, 2020, vol. 66, issue 6, 295-302

Abstract: Walnut, an important oil fruit tree, is dependent on arbuscular mycorrhizas, while mycorrhizal roles and efficient mycorrhizal fungus in walnuts are unknown. This study was conducted to evaluate the effect of five arbuscular mycorrhizal fungi (AMF) species, including Acaulospora scrobiculata, Diversispora spurca, Glomus etunicatum, G. mosseae, and G. versiforme on plant growth, leaf gas exchange, root morphology, and root nutrient contents of walnut (Juglans regia L. Liaohe 1) seedlings. Three months of AMF inoculations later, root mycorrhizal colonisation achieved 47.0% to 76.4%. AMF treatments increased plant growth performance, dependent on AMF species. AMF-inoculated plants with D. spurca, G. etunicatum, and G. mosseae showed higher root length, projected area, surface area, and volume than non-AMF plants. Except for G. versiforme, the other four AMF treatments almost significantly increased leaf photosynthesis rate, transpiration rate, and stomatal conductivity, while reduced intercellular CO2 concentrations and leaf temperature. AMF affected root nutrient contents, dependent on AMF and mineral nutrient species. These results, thereby, concluded that AMF had a positive role in walnuts, dependent on AMF species, and D. spurca was the best mycorrhizal fungus for walnut. Such results provide the potential possibility of a developing consortium of AMF in walnut cultivation management.

Keywords: endophytic fungi; mineral nutrients; mycorrhizal symbiosis; rhizosphere; root colonisation (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:66:y:2020:i:6:id:240-2020-pse

DOI: 10.17221/240/2020-PSE

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