河南农业科学 ›› 2022, Vol. 51 ›› Issue (5): 34-44.DOI: 10.15933/j.cnki.1004-3268.2022.05.004

• 作物栽培·遗传育种 • 上一篇    下一篇

耐盐碱溶磷菌的筛选鉴定及其在大豆生长中的功能验证

张美珍1,王丽娜2,刘权3,黄玉兰3,张玉先1,殷奎德1   

  1. (1.黑龙江八一农垦大学农学院,黑龙江 大庆 163319;2.黑龙江省农业科学院大庆分院,黑龙江 大庆 163316;3.黑龙江八一农垦大学生命科学技术学院,黑龙江 大庆 163319)
  • 收稿日期:2022-01-25 出版日期:2022-05-15 发布日期:2022-07-14
  • 通讯作者: 殷奎德(1964-),男,黑龙江虎林人,教授,博士,主要从事作物逆境生理研究。E-mail:yinkuide@163.com
  • 作者简介:张美珍(1998-),女,黑龙江鹤岗人,在读硕士研究生,研究方向:作物逆境生理。E-mail:944854547@qq.com
  • 基金资助:
    财政部和农业农村部国家现代农业产业技术体系资助项目(CARS-04-PS18);黑龙江八一农垦大学研究生创新科研项目(YJSCX2021-Y60)

Screening and Identification of Saline‑Alkali‑Tolerant Phosphorus‑Solubilizing Bacteria and Functional Verification in the Growth of Soybean

ZHANG Meizhen1,WANG Lina2,LIU Quan3,HUANG Yulan3,ZHANG Yuxian1,YIN Kuide1   

  1. (1.Agricultural College,Heilongjiang Bayi Agricultural University,Daqing 163319,China;2.Daqing Branch of Heilongjiang Academy of Agricultural Science,Daqing 163316,China;3.College of Life Science and Technology,Heilongjiang Bayi Agricultural University,Daqing 163319,China)
  • Received:2022-01-25 Published:2022-05-15 Online:2022-07-14

摘要: 为获得能在盐碱土中生存并对植物有促生作用的高效溶磷菌,从生长于盐碱土的苜蓿根际土中筛选得到98株溶磷菌,选出3个溶有机磷量高的菌株,并对其进行鉴定和溶磷功能验证。结果表明,细菌Y7属于假单胞菌(Pseudomonas sp.),溶有机磷量为456.35 mg/L;细菌Y31属于不动杆菌(Acinetobacter sp.),溶有机磷量为400.44 mg/L;细菌W5属于芽孢杆菌(Bacillus sp.),溶有机磷量为128.63 mg/L。这3个菌株具有一定的促生功能和耐盐碱性,其中Y7和W5具有碱性磷酸酶phoD 基因,Y31具有植酸酶appA基因。分别将这3个溶磷菌株施入缺磷的盆栽盐碱土中,大豆幼苗叶绿素含量和生物量均得到提高,说明溶磷菌能够溶解土壤中难溶性磷供大豆生长并对大豆生长具有促进作用。综上所述,这3个菌株可以通过分泌碱性磷酸酶或植酸酶来溶解难溶性磷供大豆生长且溶磷量较高,可以缓解盐碱胁迫对大豆的危害,有效促进大豆生长。

关键词: 耐盐碱, 溶磷菌, 碱性磷酸酶, 植酸酶, 大豆, 功能验证

Abstract: In order to obtain highly efficient phosphorus‑solubilizing bacteria which can survive in saline‑alkali soil and promote plant growth,98 strains of phosphorus‑solubilizing bacteria were selected from rhizosphere soil of alfalfa growing in saline‑alkali soil.Three strains with high capacity of soluble organic phosphorus were selected,and their phosphorus‑solubilizing function was verified.The results showed that the strain Y7 belonged to Pseudomonas sp.with soluble organic phosphorus content of 456.35 mg/L,Y31 belonged to Acinetobacter sp.with organic phosphorus solubilization capacity of 400.44 mg/L,W5 belonged to Bacillus sp.with organic phosphorus solubilization capacity of 128.63 mg/L.These three strains had certain growth‑promoting functions and salt‑alkali tolerance.Among them,Y7and W5 had alkaline phosphatase phoD gene,and Y31 had phytase appA gene.The three strains of phosphorus‑solubilizing bacteria were applied to the potted saline‑alkali soil with phosphorus deficiency,and they increased the chlorophyll content and biomass of soybean seedlings,indicating that phosphorus‑solubilizing bacteria could dissolve insoluble phosphorus in soil for soybean growth and promote soybean growth. To sum up,these three strains can dissolve insoluble phosphorus for soybean growth by secreting alkaline phosphatase or phytase,which can alleviate the harm of saline‑alkali stress to soybean and effectively promote the growth of soybean.

Key words: Saline?alkali tolerance, Phosphorus?solubilizing bacteria, Alkaline phosphatase, Phytase, Soybean, Functional verification

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