Abstract
A well-developed canopy structure can increase the biomass accumulation and yield of crops. Peanut seeds were sown in a soil inoculated with an arbuscular mycorrhizal fungus (AMF) and uninoculated controls were also sown. Canopy structure was monitored using a 3-D laser scanner and photosynthetic characteristics with an LI-6400 XT photosynthesis system after 30, 45 and 70 days of growth to explore the effects of the AMF on growth, canopy structure and photosynthetic characteristics and yield. The AMF colonized the roots and AMF inoculation significantly increased the height, canopy width and total leaf area of the host plants and improved canopy structure. AMF reduced the tiller angle of the upper and middle canopy layers, increased that of the lower layer, reduced the leaf inclination of the upper, middle and lower layers, and increased the average leaf area and leaf area index after 45 days of growth, producing a well-developed and hierarchical canopy. Moreover, AMF inoculation increased the net photosynthetic rate in the upper, middle and lower layers. Plant height, canopy width, and total leaf area were positively correlated with net photosynthetic rate, and the inclination angle and tiller angle of the upper leaves were negatively correlated with net photosynthetic rate. Overall, the results demonstrate the effects of AMF inoculation on plant canopy structure and net photosynthetic rate.
Highlights
A well-developed canopy structure can increase the biomass accumulation and yield of crops
The tiller angle of inoculated plants showed the trend: upper layer < middle layer < lower layer, modifying the canopy structure to a more hierarchical configuration, and there was no significant effect among different layers in the uninoculated controls
arbuscular mycorrhizal fungus (AMF) inoculateion changed the structure of the canopy and further affected photosynthesis
Summary
A well-developed canopy structure can increase the biomass accumulation and yield of crops. Canopy structure was monitored using a 3-D laser scanner and photosynthetic characteristics with an LI-6400 XT photosynthesis system after 30, 45 and 70 days of growth to explore the effects of the AMF on growth, canopy structure and photosynthetic characteristics and yield. Arbuscular mycorrhizal fungi (AMF) are a common group of soil microorganisms They can form potentially symbiotic relationships with most terrestrial plant species and have the potential to promote plant growth and increase net photosynthetic rate[8,9,10]. We used peanut as the experimental material and a three-dimensional laser scanner and an LI-6400 XT photosynthesis system to monitor the dynamic effects of AMF on canopy structure and photosynthetic characteristics to investigate the role of AMF on plant growth, canopy structure, photosynthesis and yield and to estimate plant photosynthetic capacity at later growth stages. The results provide information for improving crop canopy structure and increasing material accumulation and yield through AMF inoculation in nutrient-poor environments
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