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Salt is a main factor limiting the utilization of saline land in coastal beach. Rice is the preferred food crop for the utilization of salinized land, and some rhizosphere microorganisms can improve the salt resistance of rice. In order to screen suitable rice varieties planted in salinized land, different rice varieties were selected to cultivate under NaCl stress during the whole growth period, and the diversity and structure of bacterial communities in rhizosphere soil were measured and analyzed by Illumina Miseq sequencing technology. The bacterial community diversity in the rhizosphere soil, the species richness of varieties B3 and B6 were significant higher than those of variety B1 in 0.6% NaCl treatments. The community structure, the dominant bacterial phyla were Chloroflexi, Proteobacteria and Actinobacteria with relative abundance more than 10% of three varieties under different concentrations of NaCl treatments. There were differences in the bacterial community structure of rhizosphere soil, and the number and types of enriched species were also different in different rice varieties. Variety B6 enriched fourteen bacterial taxa branches under 0.6% NaCl treatments, such as Acidobacteriae, Nostocaceae Vicinamibacterales, Thermomicrobiales, KD4-96, etc. Therefore, B6 planted in salinized land of coastal mudflat is beneficial to the formation of dominant bacterial community in rhizosphere soil.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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