水拉恩氏菌JZ-GX1及其诱变菌株对马尾松苗的促生效应  

A study on growth promotion effect of Rahnella aquatilis JZ- GX1 and its excellent mutant strains on masson pine seedlings

作　　者：李桂娥[1] 吴小芹[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2014年第3期83-87,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业公益性行业科研专项项目(201004061);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：水拉恩氏菌(Rahnella aquatilis)JZ-GX1及其诱变菌株JZ-GX1-2和JZ-GX1-10能够有效降解植酸盐。笔者将水拉恩氏菌JZ-GX1及其优良突变菌株接种于马尾松实生苗,研究其对马尾松实生苗生长的影响,分别于接种60、120、180 d后测定并比较各接种实生苗的光合参数和叶绿素含量,以及接种前和接种180 d后马尾松苗的苗高和地径生长量。结果表明:接种菌剂对马尾松苗净光合速率(Pn)、PSⅡ实际的光化学量子效率(ФPSⅡ)和叶绿素含量,以及马尾松苗高和地径的生长促进作用,其中诱变菌株JZ-GX1-2的促进作用最佳,其次是诱变菌株JZGX-10,再者是经筛选获得的野生型菌株JZ-GX1。试验结果表明水拉恩氏菌JZ-GX1及其诱变菌株JZ-GX1-2和JZ-GX1-10可用于进一步开展田间试验和野外造林试验。Rahnella aquatilis JZ-GX1 and its excellent mutant strains are efficient phytate-degrading bacteria. In this study, R. aquatilis JZ-GX1 and its excellent mutant strains JZ-GX1-2 and JZ-GX1-10 were inoculated on masson pine seedlings to study their growth promotion effects. Photosynthetic parameters and chlorophylls content were determined re-spectively, 60, 120 and 180 days after inoculation. Seedling height and ground diameter of masson pine seedling were measured on the 180th days after inoculation. Results showed that compared to CK, JZ-GX1 and JZ-GX1-2 and JZ-GX1-10 had a significant promoting effect on photosynthetic parameters （ Pn,ФPSⅡ） , chlorophyll content, and growth of mas-son pine seedlings, in which the effect of mutant strain JZ-GX1-2 was the best, followed by mutagenesis strain JZ-GX-10 and wild screening strain JZ-GX1. In present study, the strain JZ-GX1 and its mutagenesis strains JZ-GX1-2 and JZ-GX1-10 all showed better growth promotion effect than that of the control, they could be used for further field trial and field afforestation.

关 键 词：水拉恩氏菌JZ-GX1 诱变菌株 马尾松 光合作用 植酸盐降解菌 促生效应 

分 类 号：S718.83[农业科学—林学]