| 聂 鑫，王 伟.潜在促生菌Bacillus tequilensis U36 的产IAA 特性及其对辣椒的促生效果[J].广东农业科学,2017,44(1):36-42 |
| IAA production characteristics and growth-promoting effects on pepper of potential plant grouth-promotingrhizobacteria（ PGPR） Bacillus tequilensis U36 |
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| DOI：10.16768/j.issn.1004-874X.2017.01.006 |
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| Abstract: |
| We systematically analyzed a potential plant growth-promoting rhizobacteria（PGRP）U36，which
was separated from soil. This strain was eventually determined to be Bacillus tequilensis through the morphological，
physiological and biochemical properties and 16S rRNA assay. Through the pot experiment，we found that U36
promoted pepper growth，which was better in normal soil than in sterilized soil，but the growth promoting efficiency
was much higher in sterilized soil than in normal soil after applying U36. In normal soil，the promoting efficiencies
of U36 on root length，root weight，stem length，stem weight and leaf area of pepper were 47.7%，37.5%，21.5%，
69.2% and 8.1%，respectively. While in sterile soil，the promoting efficiencies were 49.2%，58.8%，25.7%，58.2%
and 24.1%，respectively. Besides，U36 not only had the functions of nitrogen fixation and phosphate-solubilizing，
but also could produce the growth promoting substance IAA，and the generation of IAA had tryptophan dependence.
With the excellent growth-promoting effect，U36 can be used as a potential PGPR for the development of biological
fertilizer，which has a good application value. |
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