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Rhizoactinobacteria Enhance Growth and Antioxidant Activity in Thai Jasmine Rice (Oryza sativa) KDML105 Seedlings under Salt Stress

文献类型： 外文期刊

作者： Chinachanta, Kawiporn 1 ; Shutsrirung, Arawan 1 ; Santasup, Choochad 1 ; Pathom-Aree, Wasu 2 ; Luu, Doan Trung 4 ; Herrmann, Laetitia 5 ; Lesueur, Didier 5 ; Prom-u-thai, Chanakan 1 ;

作者机构： 1.Chiang Mai Univ, Fac Agr, Dept Plant & Soil Sci, Chiang Mai 50200, Thailand

2.Chiang Mai Univ, Ctr Excellent Microbial Divers & Sustainable Utili, Chiang Mai 50200, Thailand

3.Chiang Mai Univ, Fac Sci, Res Ctr Microbial Divers & Sustainable Utilizat, Dept Biol, Chiang Mai 50200, Thailand

4.Univ Montpellier, Inst Agro, IPSiM, CNRS,INRAE, F-34060 Montpellier, France

5.Alliance Biovers Int & Ctr Int Trop Agr CIAT, Asia Hub, Common Microbial Biotechnol Platform CMBP, Hanoi 10000, Vietnam

6.Deakin Univ, Fac Sci Engn & Built Environm, Sch Life & Environm Sci, Melbourne, Vic 3125, Australia

7.Ctr Cooperat Int Rech Agron Dev CIRAD, UMR Eco & Sols, Hanoi 10000, Vietnam

8.Univ Montpellier UMR, Inst Rech Dev IRD, Eco & Sols, CIRAD,INRAE,Montpellier SupAgro, F-34060 Montpellier, France

9.Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou 571101, Peoples R China

10.Chiang Mai Univ, Lanna Rice Res Ctr, Chiang Mai 50200, Thailand

关键词： aromatic rice; climate-resilient agriculture; plant-growth-promoting actinomycetes; salinity stress mitigation; salt stress alleviation; salt-tolerant rhizobacteria; microbial bioinoculants

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 12 卷 19 期

页码：

收录情况： SCI

摘要： Salinity is one of the most devastating abiotic stresses hampering the growth and production of rice. Nine indole-3-acetic acid (IAA)-producing salt-tolerant plant-growth-promoting rhizobacteria (ST-PGPR) were inoculated into Thai jasmine rice (Oryza sativa L.) variety Khao Dawk Mali 105 (KDML105) seedlings grown under different concentrations of NaCl (0, 50, 100, and 150 mM). The ST-PGPR strains significantly promoted the growth parameters, chlorophyll content, nutrient uptake (N, P, K, Ca, and Mg), antioxidant activity, and proline accumulation in the seedlings under both normal and saline conditions compared to the respective controls. The K+/Na+ ratio of the inoculated seedlings was much higher than that of the controls, indicating greater salt tolerance. The most salt-tolerant and IAA-producing strain, Sinomonas sp. ORF15-23, yielded the highest values for all the parameters, particularly at 50 mM NaCl. The percentage increases in these parameters relative to the controls ranged from >90% to 306%. Therefore, Sinomonas sp. ORF15-23 was considered a promising ST-PGPR to be developed as a bioinoculant for enhancing the growth, salt tolerance, and aroma of KDML105 rice in salt-affected areas. Environmentally friendly technologies such as ST-PGPR bioinoculants could also support the sustainability of KDML105 geographical indication (GI) products. However, the efficiency of Sinomonas sp. ORF15-23 should be evaluated under field conditions for its effect on rice nutrient uptake and growth, including the 2AP level.

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