野生大豆内生真菌YD09鉴定及促生耐盐特性研究
- Title:
- Identification of Endophytic Fungi YD09 from Wild Soybean and Its Characteristics in Promoting Growth and Salt Tolerance
- 摘要:
- 为从野生大豆中筛选具有促生抗逆的内生菌,利用组织分离法从野生大豆根中分离内生真菌,根据菌株形态和ITS序列系统发育树对菌株进行鉴定,研究菌株自身耐盐特性、胞内和胞外产物对大豆幼苗生长及耐盐性的影响。结果显示:分离得到1株内生真菌,基于菌株形态学和rRNA基因ITS序列系统发育分析,鉴定为交链孢霉菌(Alternaria alternata),命名为YD09。菌株YD09耐NaCl浓度可达30%。菌株YD09作用于大豆幼苗,具有良好的促生效果,且可使幼苗耐NaCl浓度达到200 mmol·L-1。菌株YD09胞内产物对大豆幼苗具有明显的促生效果,胞外产物能提高大豆幼苗对盐胁迫的抗性。综上,菌株YD09具有较好的促生、耐盐能力,能够缓解盐胁迫对大豆幼苗的伤害,可作为农业生产上应用的新菌种资源。
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