Abstract
Bauhinia faberi via. Microphylla (BFM) is an important tree species for vegetation restoration in the dry valley of southwestern China. However, there were few studies on the application of arbuscular mycorrhizal fungi (AMF) in improving the drought adaptation of BFM. In order to investigate the response of BFM to water stress (WS), we tested four inoculation treatments ((no AMF, Control), Glomus mosseae (GM), Glomus intraradices (GI), Glomus mosseae + Glomus intraradices (GMI)) in pots, experimented under three field water holding capacity (WHC) of 70%, 50% and 30%. The changes of seedling survival rate (SR), AMF relative root length colonization rate (Col), growth, photosynthetic parameters, water status and leaf nutrients were examined. The results showed that under 30% WHC drought conditions, SR with dual inoculation of AMF was not higher than with single inoculation of GM, suggesting that increasing the diversity of AMF did not definitely improve plant SR, and that the species of inoculated AMF might have an important impact on SR. The sensitivity of dual inoculated Col to water stress was lower than that of single inoculation, which was more favorable for dual inoculated BFM seedlings adapting to drought environment. The overall drought resistance ability (D) also showed that dual inoculation of AMF improved plant drought adaptation compared with single inoculation, which was related to the higher Col of dual inoculated AMF. This study is of practical importance to promote vegetation restoration in arid areas in a cost-effective and environmentally friendly manner.
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Acknowledgments
We thank Public Technology Center of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Alpine Ecosystem Observation and Experiment Station of Mt. Gongga, Chinese Academy of Sciences, for their kind help in field work and sample testing. This work was supported by the National Key Research and Development Program of China (2017YFC0505104) and “135 Project” of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China (SDS–135–1707).
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ZHU Wan-ze and LI Xia contributed to the study conception and design. Material preparation, data collection and analysis were performed by LI Xia, WANG Wen-wu, MA Sheng-lan, SHENG Zhe-liang and SHU Shu-miao. The first draft of the manuscript was written by LI Xia and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Conflict of Interest: ZHU Wan-ze, the corresponding author of this article is the scientific editor of Journal of Mountain Science. He was not involved in the journal’s review of, or decisions related to this manuscript.
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Li, X., Zhu, Wz., Wang, Ww. et al. Drought adaptation of Bauhinia faberi var. Microphylla seedlings with dual inoculation of arbuscular mycorrhizal fungi. J. Mt. Sci. 20, 2214–2227 (2023). https://doi.org/10.1007/s11629-023-7956-2
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DOI: https://doi.org/10.1007/s11629-023-7956-2