Root-associated fungi of Vaccinium carlesii in subtropical forests of China: intra- and inter-annual variability and impacts of human disturbances.
Root-associated fungi of Vaccinium carlesii in subtropical forests of China: intra- and inter-annual variability and impacts of human disturbances.
复制标题
中国亚热带森林中越橘根部相关真菌：年内和年际变化及人类干扰的影响
DOI：
10.1038/srep22399
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发表时间：
2016-03-01
影响因子：
4.6
通讯作者：
Liang Y
中科院分区：
文献类型：
--
作者：
Zhang Y;Ni J;Tang F;Pei K;Luo Y;Jiang L;Sun L;Liang Y
埃里克样菌根(ERM)有望在恶劣的生境中促进埃里克科植物的生长。然而，目前对茜草科植物根部伴生真菌的多样性及其驱动因素知之甚少。本研究采集了4种森林类型：老树林(OGF)、一次采伐或两次采伐的次生林(SEC I和SEC II)和杉木人工林(PLF)的毛状根样本。利用高通量测序确定了真菌群落，并评估了人类干扰的影响以及与根相关的真菌群落的年内和年际变异性。结果表明：(1)根伴生真菌群落存在年内和年际变化，担子孢门与子囊菌的比值与采样月平均气温有关；(2)人为干扰显著影响卡氏弧菌根生真菌群落结构，两种次生林类型的根伴生真菌群落结构相似，更接近老林；(3)植物群落组成、土壤参数和地理因子对卡氏弧菌根伴生真菌群落有显著影响。这些结果可能有助于更好地理解人类干扰下与ERM植物发根相关的真菌多样性的维持机制。
Ericoid mycorrhiza (ERM) are expected to facilitate establishment of ericaceous plants in harsh habitats. However, diversity and driving factors of the root-associated fungi of ericaceous plants are poorly understood. In this study, hair-root samples of Vaccinium carlesii were taken from four forest types: old growth forests (OGF), secondary forests with once or twice cutting (SEC I and SEC II) and Cunninghamia lanceolata plantation (PLF). Fungal communities were determined using high-throughput sequencing and impacts of human disturbances and the intra- and inter-annual variability of root-associated fungal community were evaluated. Diverse fungal taxa were observed and our results showed that (1) Intra- and inter-annual changes in root-associated fungal community were found and the Basidiomycota to Ascomycota ratio was related to mean temperature of the sampling month; (2) Human disturbances significantly affected structure of root-associated fungal community of V. carlesii and two secondary forest types were similar in root-associated fungal community and were closer to that of the old growth forest; (3) Plant community composition, edaphic parameters and geographic factors significantly affected root-associated fungal communities of V. carlesii. These results may be helpful in better understanding the maintenance mechanisms of fungal diversity associated with hair roots of ERM plants under human disturbances.