首页|睡莲和苦草叶表附生真菌群落多样性分布格局及其维持机制

睡莲和苦草叶表附生真菌群落多样性分布格局及其维持机制

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为了探究湿地不同水生植物叶表附生真菌群落的多样性分布格局和维持机制,本文运用高通量测序对榆古桥人工湿地优势水生植物睡莲(Nymphaea tetragona)和苦草(Vallisneria natans)叶表附生真菌群落和水体浮游真菌群落进行研究,比较分析了不同环境梯度下真菌群落的组成、多样性及其维持机制.结果表明附生和浮游真菌群落在门和属水平上的物种组成有较大差异,大多是腐生和病原真菌.浮游真菌的Sobs指数和Chao指数显著低于睡莲和苦草附生真菌群落,而三者的Shannon指数和Simpson指数无显著差异.PCoA分析表明睡莲叶表附生真菌群落与苦草叶表附生真菌群落和浮游真菌群落存在明显的空间异质性.RDA分析发现水体溶解氧(DO)、盐度(SAL)和铵根离子(NH4+)与真菌群落空间分布存在显著的关联.零模型分析结果表明确定性过程在不同生境真菌群落构建过程中占主导地位.共现性网络分析表明浮游真菌群落中存在更多的竞争,网络更为复杂且稳定.FUNGuild功能预测结果表明水生植物叶表附生真菌群落中含有大量的病原菌和腐生菌.总之,本研究结果揭示了不同水生植物附生真菌群落多样性的分布格局及其维持机制.
Diversity Distribution Pattern and Maintenance Mechanism of Epiphytic Fungi Communities on Leaves of Nymphaea tetragona and Vallisneria natans
In order to explore the diversity distribution pattern and maintenance mechanism of epiphytic fungi communities on leaf surfaces of different aquatic plants in wetland,this paper took epiphytic fungi communities on leaf surfaces of the dominant aquatic plants Nymphaea tetragona and Vallisneria natans,and planktonic fungi communities in Yuguqiao constructed wetland as the re-search objects.High-throughput sequencing was used to study the leaf surface epiphytic fungal communities of N.tetragona and V.natans in Yuguqiao constructed wetland,and the composition,diversity and maintenance mechanism of fungal communities under different environmental gradients were comparatively analyzed.The results show that epiphytic and planktonic fungi communities are different in species composition at the phylum and genus levels,and most of them are saprophytic and pathogenic fungi.The Sobs index and Chao index of planktonic fungi are significantly lower than epiphytic fungi communities of N.tetragona and V.na-tans,while there is no significant difference in Shannon index and Simpson index among them.PCoA analysis shows that there is significant spatial heterogeneity between the epiphytic fungi communities on leaves of N.tetragona and V.natans and the planktonic fungi communities.RDA analysis shows that dissolved oxygen(DO),salinity(SAL)and ammonium ion(NH4+)are significantly cor-related with the spatial distribution of fungi communities.Null model analysis shows that deterministic processes are dominant in the construction of fungi communities in different habitats.Co-occurrence network analysis shows that there is more competition in the planktonic communities,and the network is more complex and stable.The results of FUNGuild function prediction shows that there are a large number of pathogens and saprophytes in the epiphytic fungi communities of aquatic plants.In conclusion,the re-sults of this study reveal the distribution pattern and maintenance mechanism of epiphytic fungi communities diversity in different aquatic plants.

wetlandepiphytic fungiplanktonic fungibuild mechanism

李倩茹、刘晋仙、苏嘉贺、柴宝峰

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山西大学 黄土高原研究所,山西 太原 030006

黄土高原生态恢复山西省重点实验室,山西 太原 030006

湿地 附生真菌 浮游真菌 构建机制

国家自然科学基金山西省基础研究项目山西省基础研究项目

31801962201901D211129201901D211457

2024

山西大学学报(自然科学版)
山西大学

山西大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.287
ISSN:0253-2395
年,卷(期):2024.47(4)
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