松球果生伞菌及其次第分解球果的机理研究

	松球果生伞菌及其次第分解球果的机理研究; Pinecone-inhabiting agarics and mechanisms for their successive cone decompositions
	王攀蒙
导师	杨祝良
摘要	Saprophytic fungi play vital roles in the material cycling and energy flowing of ecosystems. However, due to the complexity of the ecosystems, our understanding of how saprophytic fungi interact with each other to decompose organic matter is very limited. Cones of Pinaceae plants are special substrates for saprophytic fungi with pinecone-inhabiting agarics mainly including Auriscalpium and Strobilurus fungi, which has becomed an ideal system for the study of saprophytic fungi decomposing substrates. Previous studies have shown that Strobilurus fungi have strong substrate preferences with several species being shown to be specific to certain substrates, but there are few taxonomic studies on Auriscalpium fungi. Do the pinecone-inhabiting Auriscalpium fungi on different pinecones represent different species? Are certain Auriscalpium species shown to be specific to certain substrates? Through field observations, it is found that although Auriscalpium and Strobilurus fungi are distributed in the same domain, species of Auriscalpium and Strobilurus usually share the dead pinecones of the same pine tree species in a chronological order, with fruiting bodies of Auriscalpium fungi often appearing on newly fallen cones, while those of Strobilurus typically occurring on highly rotten cones decomposed by Auriscalpium fungi. This study will study fungal substrate preferences and its related mechanisms from the perspective of molecular phylogeny and comparative genomics. 1. Study on species diversities and substrate preferences of pinecone-inhabiting Auriscalpium vulgare species complex Basidiomes of the cone-inhabiting Auriscalpium species, usually regarded as A. vulgare species complex, are widely distributed across the Northern Hemisphere. However, phylogenetic diversity patterns among different geographic populations and different substrates of A. vulgare species complex are completely unknown. In this study, samples of A. vulgare species complex in different areas of China were studied phylogenetically, morphologically, and ecologically. For comparison, European collections of A. vulgare were included. Our phylogenetic and haplotype network analyses inferred from partial nucleotide sequences including the internal transcribed spacers (ITS) 1 and 2 with the 5.8S nrDNA, the large subunit of nuclear ribosomal RNA (nrLSU), the region between the conserved domain 6 and 7 of the gene for the second largest subunit of RNA polymerase II (RPB2) and mating gene (homeodomain, HD) indicated that three phylogenetic species can be recognized, which correspond well with morphological and ecological evidence. Therefore, three species, having distinct substrate preferences, are documented here, namely the well-known A. vulgare, and the newly described species A. orientale and A. microsporum. Auriscalpium vulgare is widely distributed throughout the northern temperate Eurasia and North America, while the new species have been known mainly from subtropical and tropical Ea
	2021-11
文献类型	学位论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74589
专题	昆明植物所硕博研究生毕业学位论文
推荐引用方式 GB/T 7714	王攀蒙. 松球果生伞菌及其次第分解球果的机理研究, Pinecone-inhabiting agarics and mechanisms for their successive cone decompositions[D],2021.

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