title: Enhancement of faba bean competitive ability by arbuscular mycorrhizal fungi is highly correlated with dynamic nutrient acquisition by competing wheat.
abstract: The mechanistic understanding of the dynamic processes linking nutrient acquisition and biomass production of competing individuals can be instructive in optimizing intercropping systems. Here, we examine the effect of inoculation with Funneliformis mosseae on competitive dynamics between wheat and faba bean. Wheat is less responsive to mycorrhizal inoculation. Both inoculated and uninoculated wheat attained the maximum instantaneous N and P capture approximately five days before it attained the maximum instantaneous biomass production, indicating that wheat detected the competitor and responded physiologically to resource limitation prior to the biomass response. By contrast, the instantaneous N and P capture by uninoculated faba bean remained low throughout the growth period, and plant growth was not significantly affected by competing wheat. However, inoculation substantially enhanced biomass production and N and P acquisition of faba bean. The exudation of citrate and malate acids and acid phosphatase activity were greater in mycorrhizal than in uninoculated faba bean, and rhizosphere pH tended to decrease. We conclude that under N and P limiting conditions, temporal separation of N and P acquisition by competing plant species and enhancement of complementary resource use in the presence of AMF might be attributable to the competitive co-existence of faba bean and wheat.
authors: 1] Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China [2] Institute of Grain Groups, Xinjiang Academy of Agricultural Sciences; Key Laboratory of Crop Ecophysiology and Farming Systems in Desert Oasis Region, Ministry of Agriculture, Urumqi, Xinjiang 830091, China.
authors: Xu
authors: X
authors: Qiao
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Shuikuan
authors: S
authors: Bei
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Chunjie
authors: C
authors: Li
authors: College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China.
authors: Yan
authors: Y
authors: Dong
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Haigang
authors: H
authors: Li
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Peter
authors: P
authors: Christie
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Fusuo
authors: F
authors: Zhang
authors: Centre for Resources, Environment and Food Security, College of Resources and Environmental Sciences, China Agricultural University; Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing 100193, China.
authors: Junling
authors: J
authors: Zhang
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D018533:Biomass; D015169:Colony Count, Microbial; D055137:Glomeromycota / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D038821:Mycorrhizae / Q000254:growth & development / Q000502:physiology*; D009584:Nitrogen / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism*; D018515:Plant Leaves / Q000382:microbiology / Q000502:physiology; D018520:Plant Shoots / Q000254:growth & development; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry; D013045:Species Specificity; D013997:Time Factors; D014908:Triticum / Q000254:growth & development / Q000382:microbiology*; D031307:Vicia faba / Q000254:growth & development / Q000382:microbiology*
chemical_list: D012987:Soil; D010758:Phosphorus; D000135:Acid Phosphatase; D009584:Nitrogen
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