Salt-tolerant plant growth-promoting Pseudomonas atacamensis KSS-6 in combination with organic manure enhances rice yield, improves nutrient content and soil properties under salinity stress

IF 3.5 4区 生物学 Q2 MICROBIOLOGY Journal of Basic Microbiology Pub Date : 2024-04-15 DOI:10.1002/jobm.202300767
Naveen K. Arora, Jitendra Mishra, Pradyumna Singh, Tahmish Fatima
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Abstract

In the current study salt tolerant-plant growth-promoting rhizobacteria (ST-PGPR) Pseudomonas atacamensis KSS-6, selected on the basis of prominent plant growth-promoting (PGP) and stress tolerance properties was tested as bioinoculant to improve yield of rice grown in saline soil. The ST-PGPR KSS-6 was capable of maintaining the PGP traits up to 200 mM NaCl, however, higher salt stress conditions affected these activities. The study was designed to determine the effect of developed talc-based bioformulation using KSS-6 along with organic manure (OM) on growth and yield of paddy under saline conditions. Bioformulation broadcasting was also done to examine the effect on soil properties. It was found that the combinatorial treatment showed positive impact on growth and yield of rice under saline conditions. Co-application of KSS-6 with OM showed maximum increment in growth, chlorophyll content, plant fresh weight, and dry weight as compared to untreated control plants. Furthermore, the combinatorial treatment improved the nutrient content (P, K, Zn, Fe, Mg, and Mn) by more than 35% and enhanced the biochemical parameters such as proline, flavonoids, carbohydrates, protein, dietary fiber, and antioxidant content of rice grains by more than 32%. Soil parameters including pH and electrical conductivity (EC), moisture content, total organic carbon, OM, sodium, and chloride ions were also improved upon treatment. There was significant lowering of EC from 7.43 to 4.3 dS/m when combination of OM and bacteria were applied. These findings suggest that the application of KSS-6 in the form of bioinoculant could be a promising strategy to mitigate negative impacts of salt stress and enhance the yield and nutritional properties of rice grown in degraded and saline soil.

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耐盐植物生长促进假单胞菌 Atacamensis KSS-6 与有机肥料结合使用可提高水稻产量,改善盐分胁迫下的养分含量和土壤特性
在当前的研究中,测试了耐盐植物生长促进根瘤菌(ST-PGPR)Pseudomonas atacamensis KSS-6,该根瘤菌具有突出的植物生长促进(PGP)和抗逆特性,可作为生物接种剂提高盐碱土壤中水稻的产量。ST-PGPR KSS-6 在 200 mM NaCl 下仍能保持 PGP 特性,但在较高的盐胁迫条件下,这些活性会受到影响。本研究旨在确定使用 KSS-6 和有机肥(OM)开发的滑石基生物配方对盐碱条件下稻谷生长和产量的影响。此外,还对生物配方进行了广播,以检查其对土壤特性的影响。结果发现,组合处理对盐碱条件下水稻的生长和产量有积极影响。与未处理的对照植物相比,同时施用 KSS-6 和 OM 的植物在生长、叶绿素含量、植株鲜重和干重方面的增幅最大。此外,组合处理还提高了养分含量(P、K、Zn、Fe、Mg 和 Mn)35% 以上,并提高了脯氨酸、类黄酮、碳水化合物、蛋白质、膳食纤维和抗氧化剂含量等生化参数 32% 以上。土壤参数,包括 pH 值和导电率(EC)、含水量、总有机碳、OM、钠离子和氯离子也在处理后得到改善。结合施用有机物和细菌后,导电率从 7.43 降至 4.3 dS/m。这些研究结果表明,以生物接种剂的形式施用 KSS-6 是一种很有前景的策略,可以减轻盐胁迫的负面影响,提高在退化和盐碱土壤中生长的水稻的产量和营养特性。
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来源期刊
Journal of Basic Microbiology
Journal of Basic Microbiology 生物-微生物学
CiteScore
6.10
自引率
0.00%
发文量
134
审稿时长
1.8 months
期刊介绍: The Journal of Basic Microbiology (JBM) publishes primary research papers on both procaryotic and eucaryotic microorganisms, including bacteria, archaea, fungi, algae, protozoans, phages, viruses, viroids and prions. Papers published deal with: microbial interactions (pathogenic, mutualistic, environmental), ecology, physiology, genetics and cell biology/development, new methodologies, i.e., new imaging technologies (e.g. video-fluorescence microscopy, modern TEM applications) novel molecular biology methods (e.g. PCR-based gene targeting or cassettes for cloning of GFP constructs).
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