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| Screening phosphate-solubilizing fungi from the mangrove rhizosphere and their effect on Aegiceras corniculatum seedling growth |
| Received:November 27, 2021 |
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| KeyWord:phosphate-solubilizing fungi;rhizosphere;Aegiceras corniculatum;growth-promoting effect |
| Author Name | Affiliation | E-mail | | LIN Yushan | Key Laboratory of the Coastal and Wetland Ecosystems(Xiamen University), Ministry of Education, Xiamen 361102, China | | | LIU Jingchun | Key Laboratory of the Coastal and Wetland Ecosystems(Xiamen University), Ministry of Education, Xiamen 361102, China | | | LU Haoliang | Key Laboratory of the Coastal and Wetland Ecosystems(Xiamen University), Ministry of Education, Xiamen 361102, China | | | DING Youfang | Xiamen Botanical Garden, Xiamen 361003, China | | | YAN Chongling | Key Laboratory of the Coastal and Wetland Ecosystems(Xiamen University), Ministry of Education, Xiamen 361102, China | ycl@xmu.edu.cn |
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| Abstract: |
| To obtain phosphate-solubilizing fungi（PSF）with the function of P-solubilization and as a plant growth promoter, the phosphate medium of the National Botanical Research Institute was employed to screen PSF strains from mangrove rhizospheric soils. The P-solubilizing capacity of multiple insoluble phosphates of PSF strains and their growth-promoting effect on Aegiceras corniculatum were further evaluated. The results showed that three fungi strains（PSF-FJ1, PSF-FJ2, and PSF-FJ3）were able to solubilize various insoluble phosphates in the order Ca3（PO4）2 >AlPO4 >FePO4 > lecithin. The PSF-FJ1 strain exhibited the strongest Ca3（PO4）2-solubilizing activity （773.36 mg·L-1）, and medium acidification was considered the key principal P-solubilization mechanism with Ca3（PO4）2. The PSF-FJ1 strain was identified as being from the genus Penicillium based on ITS sequence analysis, which included indole-3-acetic acid and siderophores synthetic capacity. Relative to the control, the inoculation of Penicillium sp. PSF-FJ1 strain increased total biomass by 23.13%; enhanced root vitality by 64.91%; improved Pn, Tr, and Gs by 37.92%, 40.04%, and 41.70%, respectively; and increased the leaf photosynthetic pigment content and P and N uptake. Therefore, as the application of the Penicillium sp. PSF-FJ1 strain positively improved the growth of A. corniculatum seedlings, it has potential for use as a biofertilizer in the reforestation of coastal mangrove wetlands. |
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