Zhang Zhihao, Chai Xutian, Gao Yanju, Zhang Bo, Lu Yan, Du Yi, Zhang Yulin, Ding Ya, Tariq Akash, Ullah Abd, Li Xiangyi, Zeng Fanjiang
Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.
Microorganisms. 2022 Nov 30;10(12):2376. doi: 10.3390/microorganisms10122376.
The mycobiome in the rhizosphere and within the roots benefits the nutrition and function of host plants. However, compared with the bacterial community, root-associated mycobiomes of desert plants and the forces that drive their assemblage are limited. Here, we investigated the mycobiomes in bulk soil, rhizosphere, and root compartments of Shap., a phreatophyte species dominating in Central Asia. The internal transcribed spacer (ITS) gene phylogenetic profiles displayed significantly diverse mycobiomes across three compartments and host growth times, together explaining 31.45% of the variation in the community composition. The community structure of the perennial stage was markedly different from that of other stages (30 days to 2 years old). Along the soil-plant continuum, the α-diversity (estimated by Chao1) decreased gradually, while concomitantly increasing the community dissimilarity and the influence of edaphic factors. Specific leaf area, soil water content, and soil organic matter levels were common factors driving the composition of the three mycobiome communities. A more complex and connected network was observed in the root community compared with the other compartments. Overall, our work suggests that an age-sensitive host effect restructured the desert-plant-root-associated mycobiome, and that edaphic factors and host growth strategy may play potential roles in this process.
根际和根内的真菌群落有益于宿主植物的营养和功能。然而，与细菌群落相比，沙漠植物的根相关真菌群落及其组装驱动力的研究较少。在此，我们研究了中亚地区优势潜水植物疏叶骆驼刺（Shap.）的 bulk 土壤、根际和根区室中的真菌群落。内部转录间隔区（ITS）基因系统发育图谱显示，三个区室和宿主生长时期的真菌群落存在显著差异，共同解释了群落组成中 31.45% 的变异。多年生阶段的群落结构与其他阶段（30 天至 2 岁）明显不同。沿着土壤 - 植物连续体，α 多样性（由 Chao1 估计）逐渐降低，同时群落差异和土壤因子的影响增加。比叶面积、土壤含水量和土壤有机质水平是驱动三个真菌群落组成的共同因素。与其他区室相比，在根群落中观察到更复杂且相互连接的网络。总体而言，我们的研究表明，年龄敏感的宿主效应重塑了与沙漠植物根相关的真菌群落，并且土壤因子和宿主生长策略可能在此过程中发挥潜在作用。
