生态学杂志2018，Vol.37Issue(8)：2285-2292,8.DOI:10.13292/j.1000-4890.201808.032
接种菌根真菌对青冈栎水分吸收的贡献
Contribution of arbuscular mycorrhizal fungi to water absorption by Cyclobalanopsis glauca
摘要
Abstract
To examine the contribution of mycorrhizal networks to plant water uptake in karst areas, Cyclobalanopsis glauca seedlings, the main afforestation species in karst areas, were inoculated with mixed Funneliformis mosseae and Rhizophagus intraradices. A root compartmentalization system was used to control the connection between C. glauca seedlings, with adjacent plants being connected only through mycorrhizal networks. Stable hydrogen isotope abundance was used to trace water transport between the mycorrhizal networks and C. glauca seedlings. Our results showed that the density of mycelium decreased with increasing distance from plant roots; the mycelium around C. glauca roots could be found even at a distance of 10-15 cm. There was a significantly positive correlation between hydrogen isotope abundance and mycelial density in the rhizosphere soil. During drought stage, C. glauca seedlings absorbed water via hydraulic lift, with water being transported between adjacent seedlings through the mycorrhizal networks. The contribution of mycorrhizal networks to water transport was estimated using a mixed linear model. The results showed that 1.7％-2.2％ of water in the receptor chamber of seedlings was absorbed from the soil of donor chamber by the mycorrhizal networks. The results indicated that water transport by mycorrhizal networks is important for plants with shallow roots in the karst area during the dry season.关键词
丛枝菌根真菌/喀斯特地区/水分传输/稳定同位素Key words
mycorrhiza fungi/karst area/water transportation/stable isotope引用本文复制引用
张中峰,张金池,徐广平,周龙武,李艳琼..接种菌根真菌对青冈栎水分吸收的贡献[J].生态学杂志,2018,37(8):2285-2292,8.基金项目
国家自然科学基金项目(41603079,31470709) （41603079,31470709）
广西科技攻关计划项目(桂科攻1598016-12) （桂科攻1598016-12）
江苏省水土保持与生态修复重点实验室开放基金(JSSBL2017-4) （JSSBL2017-4）
广西植物研究所基本业务费项目(桂植业15005)资助 （桂植业15005）
