Isolated Pantoea pineapple hyl01 strain and its application in promoting watermelon root growth

Abstract

The invention discloses an isolated strain of Pantoea pineapple HYL01 and its application in promoting the growth of watermelon roots. An isolated Pantoea ananatis (Pantoea ananatis) bacterial strain of the present invention, named as Pantoea ananatis HYL01, is preserved in the China Type Culture Collection Center, the address is at Wuhan University, and its microorganism preservation number is CCTCC NO.M 2014530, The date of deposit is October 29, 2014. The research results showed that the strain HYL01 had a strong ability to dissolve phosphorus, and the effective amount of dissolved Ca3(PO4)3 was 140.26mg / L. It also had the ability to secrete IAA, and the maximum secretion of IAA was 11.39mg / L. After the application of HYL01 bacterial agent, it can significantly promote the growth of total root length, root surface area, root volume and specific root length of watermelon seedlings, and significantly increase the hairy root length of watermelon seedlings in the range of root system diameter greater than 0 to less than or equal to 0.5mm Therefore, the isolated Pantoea pineapple strain HYL01 obtained by the present invention has the potential to prepare a compound microbial fertilizer that promotes the growth of watermelon roots.

Description

technical field [0001] The invention relates to a strain of phosphate-dissolving bacteria, in particular to a strain of Pantoea ananatis with auxin (IAA) synthesis ability, and also relates to the application of the strain in promoting the growth of watermelon roots. The invention belongs to the technical field of microorganisms. Background technique [0002] Phosphorus is one of the macronutrient elements necessary for plant growth, but there is more phosphorus in the soil than Ca 2+ , Fe 3+ , Fe 2+ 、Al 3+ Combined to form insoluble phosphate, only a small part can be absorbed and utilized by plants, which leads to the widespread phenomenon of phosphorus deficiency in cultivated soil (Taurian T, Anzuay M S, Angelini J G, et al. Phosphate-solubilizing peanut associated bacteria: screening for plant growth- promoting activities[J]. Plant and soil, 2010, 329(1-2): 421-431.). Soil phosphorus-dissolving microorganisms can convert fixed phosphorus that cannot be absorbed by ...

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Problems solved by technology

[0002] Phosphorus is one of the macronutrient elements necessary for plant growth, but there is more phosphorus in the soil than Ca 2+ , Fe 3+ , Fe 2+ 、Al 3+ Combined to form insoluble phosphate, only a small part can be absorbed and utilized by plants, which leads to the widespread phenomenon of phosphorus deficiency in cultivated soil (Taurian T, Anzuay M S, Angelini J G, et al. Phosphate-solubilizing peanut associated bacteria: screening for plant growth- promoting activities[J]. Plant and soil, 2010, 329(1-2): 421-431.)

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