文献类型：期刊文献

英文题名：Arbuscular Mycorrhizal Fungal Mediation of Plant-Plant Interactions in a Marshland Plant Community

作者：Zhang, Qian[1,2] Sun, Qixiang[1,2] Koide, Roger T.[3] Peng, Zhenhua[1,2] Zhou, Jinxing[4] Gu, Xungang[5] Gao, Weidong[1,2] Yu, Meng[1,2]

第一作者：Zhang, Qian;张倩

通信作者：Sun, QX[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[3]Brigham Young Univ, Dept Biol, Provo, UT 84602 USA;[4]Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China;[5]Anhui Agr Univ, Coll Resource & Environm, Hefei 230036, Peoples R China

年份：2014

卷号：2014

外文期刊名：SCIENTIFIC WORLD JOURNAL

收录：;Scopus(收录号：2-s2.0-84896335526);WOS:【SCI-EXPANDED(收录号:WOS:000331750700001)】；

基金：This work was supported by the National Scientific and Technological Project (no. 2011BAD38B07), the Central Public-Interest Scientific Institution Basal Research Fund (no. RIF2012-08), and the Natural Science Foundation of China (nos. 31300105 and 41071334).

语种：英文

摘要：Obligate aerobic AMF taxa have high species richness under waterlogged conditions, but their ecological role remains unclear. Here we focused on AM fungal mediation of plant interactions in a marshland plant community. Five cooccurring plant species were chosen for a neighbor removal experiment in which benomyl was used to suppress AMF colonization. A Phragmites australis removal experiment was also performed to study its role in promoting AMF colonization by increasing rhizosphere oxygen concentration. Mycorrhizal fungal effects on plant interactions were different for dominant and subdominant plant species. AMF colonization has driven positive neighbor effects for three subdominant plant species including Kummerowia striata, Leonurus artemisia, and Ixeris polycephala. In contrast, AMF colonization enhanced the negative effects of neighbors on the dominant Conyza canadensis and had no significant impact on the neighbor interaction to the dominant Polygonum pubescens. AM colonization was positively related to oxygen concentration. P. australis increased oxygen concentration, enhanced AMF colonization, and was thus indirectly capable of influencing plant interactions. Aerobic AM fungi appear to be ecologically relevant in this wetland ecosystem. They drive positive neighbor interactions for subdominant plant species, effectively increasing plant diversity. We suggest, therefore, that AM fungi may be ecologically important even under waterlogged conditions.