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Effects of soil and climatic factors on arbuscular mycorrhizal fungi in rhizosphere soil under R obinia pseudoacacia in the L oess P lateau, C hina
Author(s) -
He F.,
Tang M.,
Zhong S. L.,
Yang R.,
Huang L.,
Zhang H. Q.
Publication year - 2016
Publication title -
european journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 1351-0754
DOI - 10.1111/ejss.12381
Subject(s) - rhizosphere , acaulospora , potassium , species richness , arid , botany , biology , ecosystem , chemistry , agronomy , ecology , symbiosis , arbuscular mycorrhizal , bacteria , genetics , organic chemistry
We explored arbuscular mycorrhizal fungi ( AMF ) in the rhizosphere soil under R obinia pseudoacacia L ., L eguminosae (black locust), and evaluated the relations between their diversity and soil and climatic factors in the semi‐arid L oess P lateau of northwest C hina. A total of 23 AMF species were identified at six sites. Of these, six belonged to the genus F unneliformis ( G lomeraceae), five to R hizophagus ( G lomeraceae), three to G lomus ( G lomeraceae), two to A caulospora ( A caulosporaceae), two to C laroideoglomus ( C laroideoglomeraceae), two to S eptoglomus ( G lomeraceae), one to A mbispora ( A mbisporaceae), one to S cutellospora ( G igasporaceae) and one to S clerocystis ( G lomeraceae). The species that occurred in the largest proportion of soil samples were R hizophagus intraradices (75%) and F unneliformis dimorphicum (66.7%). Soil‐available potassium was positively correlated with mycorrhizal colonization and species richness. Spore density was negatively correlated with soil pH , whereas the S hannon– W iener diversity index was positively correlated with total potassium. Most of the soil and climatic factors measured affected the AMF indices directly rather than indirectly. The relative abundances of 13 AMF species were strongly affected by precipitation, temperature, total nitrogen, ammonium nitrogen and available potassium. This suggests that AMF species are diverse and F unneliformis was the most common and dominant AMF genus in the rhizosphere soil under black locust in the L oess P lateau. Precipitation directly affected AMF status and diversity in this distinctive semi‐arid ecosystem. Highlights Analysis of the effects of soil and climatic factors on mycorrhizal colonization and AMF diversity of black locust. Improved understanding of AMF communities and their function in soil under black locust. Precipitation was the strongest direct factor that affected AMF in the semi‐arid region. Funneliformis was the most common AMF genus in rhizosphere soil under black locust.