接种丛枝菌根真菌对干旱胁迫燕麦非结构性碳水化合物及碳氮磷化学计量特征的影响
收稿日期: 2024-12-04
录用日期: 2025-04-08
网络出版日期: 2025-05-09
基金资助
中央引导地方科技发展资金项目(YDZJSX2022A037);山西省现代农业产业技术体系建设专项资金(2024CYJSTX03-18);2024年山西省研究生教育创新项目(2024KY294)
Effect of arbuscular mycorrhizal fungi inoculation on non-structural carbohydrates and C, N and P stoichiometry in oat plants under drought stress
Received date: 2024-12-04
Accepted date: 2025-04-08
Online published: 2025-05-09
Supported by
Central Guidance for Local Science and Technology Development Fund Project(YDZJSX2022A037);Shanxi Province Modern Agriculture Minor Cereals Industrial Technology System(2024CYJSTX03-18);2024 Postgraduate Education Innovation Project in Shanxi Province(2024KY294)
张斌 , 张浩成 , 乔天 , 吕治兵 , 许亚男 , 李雪芹 , 原向阳 , 冯美臣 , 张美俊 . 接种丛枝菌根真菌对干旱胁迫燕麦非结构性碳水化合物及碳氮磷化学计量特征的影响[J]. 植物生态学报, 2025 , 49(7) : 1082 -1095 . DOI: 10.17521/cjpe.2024.0434
Aims The accumulation of nutritional components in plants is critically linked to their survival capacity and productivity. Investigating how arbuscular mycorrhizal fungi (AMF) inoculation regulates drought tolerance in plants through nutrient component changes in various organ will establish a theoretical framework for applying AMF to improve crop resilience under water-limited conditions.
Methods The study employed a controlled pot experiment with two water regimes (75% vs. 55% field capacity) and AMF inoculation treatments, using oat (Avena sativa) cultivar ‘Bayou 1’. Mycorrhizal colonization rates were quantified at jointing and filling stages, followed by analysis of non-structural carbohydrates (NSC), carbon (C), nitrogen (N), phosphorus (P) contents in root, stem, and leaf. Grain yield was recorded at the maturity stage.
Important findings In oat plants inoculated with AMF under drought stress, the AMF colonization rate, plant height, and root-to-shoot ratio were significantly enhanced, resulting in 13.31% increase in grain yield. Notably, these improvements in growth parameters and yield exceeded those observed in AMF-inoculated plants under well-watered conditions. Furthermore, AMF inoculation under drought stress increased soluble sugar accumulation in stem and leaf. Concurrently, the contents of C, N, P in root, stem, leaf, as well as the leaf C:N significantly increased, especially the contents of P in leaf. In contrast, the leaf N:P significantly declined. Redundancy analysis revealed that the contents of leaf soluble sugars, and stem C, root N contents served as key indicators explaining variations in growth traits and grain yield under drought stress and AMF inoculation, respectively. Overall, AMF inoculation under drought conditions enhanced oat drought tolerance and hence improved grain yield, primarily attributed to increase AMF colonization rate, which facilitated synergistically the accumulation of soluble sugar and C, N, P in organs, and modulated the leaf stoichiometric ratios (C:N and N:P).
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