Inoculation of halotolerant plant-growth-promoting bacteria improved the growth of chia (Salvia hispanica L.) in saline and nonsaline soils

被引:1
|
作者
Yanez-Yazlle, Maria Florencia [1 ,2 ]
Locatelli, Michelangelo [1 ,2 ]
Acreche, Martin Moises [3 ,4 ]
Rajal, Veronica Beatriz [1 ,5 ,6 ]
Irazusta, Veronica Patricia [1 ,2 ]
机构
[1] Univ Nacl Salta UNSa, CONICET, Inst Invest Ind Quim INIQUI, Salta, Argentina
[2] UNSa, Fac Ciencias Nat, Salta, Argentina
[3] Inst Nacl Tecnol Agr INTA, Estn Expt Agr EEA Salta, Salta, Argentina
[4] Consejo Nacl Invest Cient & Tecn, Salta, Argentina
[5] UNSa, Fac Ingn, Salta, Argentina
[6] Nanyang Technol Univ NTU, Singapore Ctr Environm Life Sci Engn SCELSE, Singapore, Singapore
来源
CROP & PASTURE SCIENCE | 2024年 / 75卷 / 09期
关键词
beneficial bacteria; photosynthesis; physiological status; saline stress; shoot and root dry weight; shoot and root length; stomatal conductance; transpiration; PROLINE; TOLERANCE; RESPONSES; STRESS;
D O I
10.1071/CP24143
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
Context Chia (Salvia hispanica L.), a nutrient-rich crop with potential application in different industries, is sensitive to salinity. Halotolerant plant-growth promoting bacteria could be a biotechnological strategy to increase chia's salinity tolerance. Aims The aim of this study was to determine the morphological and physiological response of chia plants inoculated with free-living halotolerant plant-growth promoting bacteria and grown in saline soils under greenhouse conditions. Methods A total of 15 bacterial treatments were inoculated to plants potted in soils with three electrical conductivity levels: 0.5, 4, and 6 dS m(-1). Mortality and morphological and physiological parameters were evaluated. The measured variables were used to calculate a relative growth index. Key results Bacterial inoculation had a positive effect on plants at 4 dS m(-1). Plants inoculated with Pseudomonas sp. AN23, Kushneria sp. T3.7, and C6 (Halomonas sp. 3R12 + Micrococcus luteus SA211) exhibited the best morphological and physiological performance (51% longer shoots, up to 90% heavier roots and up to 400% higher photosynthetic rate than control plants). Moreover, plants inoculated with Kushneria sp. T3.7 and C5 (Halomonas sp. 3R12 + Pseudomonas sp. AN23) showed significant increase in stomatal conductance and transpiration rate (up to 12 times) and in proline production (up to 345 mu g g(-1) leaf fresh weight) with respect to control plants (8 mu g g(-1) leaf fresh weight) under saline conditions. Conclusions The analysed extremophilic plant-growth promoting bacteria enhanced growth and stress tolerance in chia, a salt-sensitive crop. Implications Free-living plant-growth promoting bacteria isolated from hypersaline environments have potential for bioinoculant formulation for salinity-sensitive crops.
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页数:11
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