%0 Journal Article
%T Influence of arbuscular mycorrhizal associations on the interspecific competition between mycorrhizal and non-mycorrhizal plants<br>接种AMF对菌根植物和非菌根植物竞争的影响
%A ZHANG Yuting
%A WANG Wenhu
%A SHEN Hong
%A GUO Tao
%A <br>张宇亭
%A 王文华
%A 申鸿
%A 郭涛
%J 生态学报
%D 2012
%I 
%X More than 85% of terrestrial plant species associate with arbuscular mycorrhizal fungi (AMF). Most plant individuals stimulate nutrient availability through their fungal partner. Highly mycorrhizal-dependent plant species derive more benefits from AMF in comparison with plant species with a relatively low mycorrhizal dependency. Until recently, the effects of AMF on the competition between mycorrhizal and non-mycorrhizal plants (with high phosphate foraging ability) remained largely unclear, particularly in an environment with low phosphate bioavailability. Mycorrhizal effects on plant interactions are most likely due to alterations in the soil nutrient availability. AMF colonization could increase nutrient (particularly phosphate) availability for host plants and consequently increase plant biomass. The larger plants are then expected to be successful competitors. In the present study, maize (Zea mays L.) and rape (Brassica napus L.) plants were cultivated in three different interaction status, namely monoculture, intercropping and nylon net split. All the plants were inoculated with Glomus intraradices, Glomus mosseae or remained uninoculated. The strength of competition is measured as the reduction in biomass caused by the presence of a competitor. The results showed that maize growth and mineral nutrition was suppressed, while the mycorrhizal dependency increased to some extent, in intercropping compared with monoculture system. In intercropping system inoculation with G. intraradices and G. mosseae significantly decreased phosphorus concentration and content of rape roots compared with non-inoculation treatments, while in contrast mycorrhizal association improved phosphorus nutrition of maize plants. The experimental results clearly showed the beneficial effects of mycorrhizal associations on AMF host plants in competition with non-host plants. All these revealed that AMF may play an important role in structuring plant community and influencing plant biodiversity in ecosystems.
%K growth
%K phosphorus
%K relative competitive strength
%K nutrition competitive ratio
%K arbuscular mycorrhizal fungus<br>生长
%K 磷
%K 相对竞争能力
%K 养分竞争比率
%K 丛枝菌根真菌
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=CEC329CE751EFFDAB4BC4CBCABE3EC56&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=94C357A881DFC066&sid=1658FDEF8AE04907&eid=F91C9B147A9ECBD0&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=28