Local patterns of arbuscular mycorrhizal fungal diversity and community structure in a natural Toona ciliata var. pubescens forest in South Central China.
Local patterns of arbuscular mycorrhizal fungal diversity and community structure in a natural Toona ciliata var. pubescens forest in South Central China.
复制标题
天然香椿变种丛枝菌根真菌多样性和群落结构的局部模式。
作者：
Pan J;Wang Q;Guo X;Jiang X;Cheng Q;Fu L;Liu W;Zhang L
香椿（Toona ciliata vars pubescens，香椿科）被列为濒危物种，由于长期过度开发利用，存在自然再生障碍。丛枝菌根真菌（AMF）对植物生长和自然再生具有重要的促进作用。然而，人们对天然林中AMF群落的特征了解甚少。采用Illumina PE250高通量测序技术，研究了关山国家级自然保护区天然白桦林根际土壤和3种优势树种（白桦Padus buergeriana， Pb和Maesa japonica， Mj）根际土壤AMF群落特征。结果发现，根际土壤和根系中AMF含量最多的是肾小球科。根际土壤中始祖孢科植物的相对丰度显著大于根系；根际土壤中肾小球科植物的相对丰度显著低于根系（p < 0.05）。在不同树种中，云杉科和土榄科在Mj和Tc中的相对丰度大于Pb。Tc、Pb和Mj根际土壤AMF操作分类单位（OTUs）分别比对应根高1.30倍、1.43倍和1.71倍。但Chao指数表明，根系AMF群落丰富度高于根际土壤。这表明，AMF聚集度较高的群落集中在根系中，而丰度相对较低的AMF类群集中在根际土壤中，这相应地降低了AMF群落的计算丰富度指数。冗余分析表明，不同土壤化学性质对AMF群落特征的影响不同。本研究对AMF多样性调查的解释和AMF在植被恢复中的应用设计具有重要意义。
Toona ciliata var. pubescens (Toona in Meliaceae) (Tc) is listed as an endangered species, and there are natural regeneration obstacles due to its long-term excessive exploitation and utilization. Arbuscular mycorrhizal fungi (AMF) can produce beneficial effects for plant growth and natural regeneration. However, the characteristics of the AMF community in natural Tc forests are poorly understood. The Illumina PE250 high-throughput sequencing method was used to study the characteristics of the AMF community in the rhizosphere soil and roots associated with three dominant tree species (Tc; Padus buergeriana, Pb; and Maesa japonica, Mj) in a natural Tc forest in Guanshan National Natural Reserve, South Central China. The results found that Glomeraceae was the most abundant AMF family in the rhizosphere soil and roots. Moreover, the relative abundance of Archaeosporaceae in rhizosphere soil was significantly larger than that in the roots; in contrast, the relative abundance of Glomeraceae in rhizosphere soil was significantly lower than that in the roots (p < 0.05). Regarding different tree species, the relative abundances of Acaulosporaceae and Geosiphonaceae were larger in Mj and Tc than in Pb. AMF operational taxonomic units (OTUs) were 1.30-, 1.43-, and 1.71-fold higher in the Tc, Pb, and Mj rhizosphere soil, respectively, than in the corresponding roots. Nevertheless, higher AMF community richness was found in the roots compared to that in the rhizosphere soil based on the Chao index. This finding indicated that AMF of a relatively high aggregation degree were in roots, and more AMF groups with relatively low abundance occurred in the rhizosphere soil, which correspondingly lowered the calculated richness index of the AMF community. A redundancy analysis showed that different soil chemical properties impacted variations in the AMF community characteristics differently. This study has great significance for the interpretation of AMF diversity survey and the application design of AMF in vegetation restoration.
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影响因子：
9.7
作者：
Gillespie, Adam W.;Farrell, Richard E.;Blyth, Robert I. R.
通讯作者：
Blyth, Robert I. R.
影响因子：
--
作者：
Guo Xiao-yan;Fu Li;Liang Yue-long
通讯作者：
Liang Yue-long
香椿中部和外围群体的遗传多样性。
影响因子：
0.4
作者：
Liu, J.;Jiang, J. M.;Chen, Y. T.
通讯作者：
Chen, Y. T.
影响因子：
48
作者：
Edgar, Robert C.
通讯作者：
Edgar, Robert C.
影响因子：
4.2
作者：
Bainard, Luke D.;Bainard, Jillian D.;Gan, Yantai
通讯作者：
Gan, Yantai