|Table of Contents|

Effects of AM Fungi and Exogenous Phosphorus on Photosynthetic Physiology of Camellia oleifera Seedlings Under Aluminum Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2024年14
Page:
34-43
Research Field:
Publishing date:

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Title:
Effects of AM Fungi and Exogenous Phosphorus on Photosynthetic Physiology of Camellia oleifera Seedlings Under Aluminum Stress
Author(s):
ZENG Weijun; LIU Yan
(Guizhou Institute of Biology,Guiyang,Guizhou 550009)
Keywords:
arbuscular mycorrhizal fungi; phosphate fertilizer; Camellia oleifera; aluminum stress; photosynthetic physiology
PACS:
S 794.4
DOI:
10.11937/bfyy.20234469
Abstract:
The One-year-old common Camellia oleifera seedlings and four species of arbuscular mycorrhizal fungi (AMF) were used as experimental materials，the pot experiment was conducted.The seedlings were cultivated for 8 months under combinations of phosphorus (0，30，60，120 mg·L-1) and aluminum (0，1，2，3 mmol·L-1) treatments.The effects of AMF and exogenous phosphorus on the photosynthetic physiology of Camellia oleifera seedlings under aluminum stress were studied,in order to provide reference for further research on the mechanisms of exogenous phosphorus and arbuscular mycorrhizal fungi in alleviating aluminum stress.The results showed that among the four AMF species，Funneliformis mosseae had the highest infection rate.Inoculating seedlings with Funneliformis mosseae increased the net photosynthetic rate，stomatal conductance，transpiration rate，chlorophyll content，carotenoids，and CO2 utilization efficiency by 295.19%，381.48%，297.86%，57.63%，172.75% and 142.00%，respectively，compared to the control.Under aluminum stress，inoculation with Funneliformis mosseae increased the sensitivity of Camellia oleifera seedlings′ photosynthetic physiology response.The net photosynthetic rate，stomatal conductance，transpiration rate，chlorophyll content，non-photochemical quenching parameters，non-photochemical quenching quantum yield，root dry weight，and underground stem were higher under high aluminum stress.Exogenous phosphorus addition at concentrations below 120 mg·L-1 alleviated the effects of aluminum stress on Funneliformis mosseae mycorrhizal seedlings′ photosynthetic physiology，mainly by significantly increasing their net photosynthetic rate and root dry weight.In summary，soil aluminum toxicity inhibited the photosynthesis of Camellia oleifera，thereby affecting its growth and development. The synergistic effect of exogenous phosphorus and arbuscular mycorrhizal furgi formation effectively alleviated the impact of aluminum stress on Camellia oleiferaphotosynthetic physiology.

References:

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Last Update: 2024-08-08