1. 一株耐镉促生菌的筛选、鉴定及对番茄幼苗生长与镉累积的影响.
- Author
-
魏暋婷, 孙燕妮, and 李暋鲜
- Abstract
In this study, a cadmium (Cd)-resistant bacterium D36 was isolated from the rhizo- spheric soil of tomato plants. The 16S rDNA gene was amplified and the plant growth-pro-moting properties were identified ? the effects of D36 on the growth and Cd accumulation in tomato plants were investigated via hydroponic experiment. The results indicated that the ob¬tained strain belongs to the genus of Sphingomonas and it has phosphate solubilization ? sid- erophores production and indoleacetic acid production properties. Under Cd stress?D36 inocu¬lation increased the root length and plant height of tomato plants by 210. 74% and 14. 97%. The fresh weight of the shoots and roots was increased by 18. 33 % and 15.09%? respectively. Total chlorophyll content was increased by 13. 40%. Meanwhile? the H2O2 content was decreased by 35. 09 % in tomato roots and the POD activity was increased by 74. 94%. Be sides,D36 inoculation markedly decreased the Cd content in tomato roots by 27. 63%. Taken together,our results indicated that D36 could modulate growth and Cd uptake of the tested plants. This study might provide a promising way of using PGPR control Cd uptake in food crops. [ABSTRACT FROM AUTHOR]
- Published
- 2020