Mecanismos de inducción de rizobios para reducir el estrés por sequía en las leguminosas

Santillana, Nery

doi:10.18271/ria.2021.263

Cited by 5 publications

(9 citation statements)

References 61 publications

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“…This could explain the higher drought tolerance of CIAT899, 353, A12 and A13 strains which showed lower dehydration, higher leaf water content and, in the case of CIAT899, a better osmotic adjustment. In this sense, the accumulation of osmolytes such as trehalose and proline in the nodules has been related to the tolerance to drought of some plant genotypes ( Goyal et al., 2021 ; Santillana Villanueva, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, a positive correlation between the N% and nodule fresh weight was detected (R=0.333***). There are many studies using nodule weight as an indicator of a strain´s infectiveness and many others report that drought reduces nodulation ( Kibido et al., 2019 ; Aulakh et al., 2020 ; Santillana Villanueva, 2021 ). It has also been stated that the more drought tolerant a strain is, the greater nodulation capacity it has under drought conditions ( Aulakh et al., 2020 ; Steiner et al., 2020 ; Omari et al., 2022).…”

Section: Discussionmentioning

confidence: 99%

“…In legume plants, drought is also one of the main factors that affect more negatively the rhizobial-plant interactions and therefore the biological nitrogen fixation. Water stress affects adversely all the aspects of the legume-rhizobium symbiosis, being one of the mayor problems the rhizobia survival and persistence in the soils ( Prudent et al., 2019 ; Santillana Villanueva, 2021 ; Sharaf et al., 2019 ; Sindhu et al., 2020 ). Drought also inhibits nodulation and nitrogen fixation).…”

Section: Introductionmentioning

confidence: 99%

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Selected indigenous drought tolerant rhizobium strains as promising biostimulants for common bean in Northern Spain

et al. 2023

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Drought is the most detrimental abiotic stress in agriculture, limiting crop growth and yield and, currently, its risk is increasing due to climate change. Thereby, ensuring food security will be one of the greatest challenges of the agriculture in the nearest future, accordingly it is essential to look for sustainable strategies to cope the negative impact of drought on crops. Inoculation of pulses with biostimulants such as rhizobium strains with high nitrogen fixation efficiency and drought-tolerance, has emerged as a promising and sustainable production strategy. However, some commercial inoculums are not effective under field conditions due to its lower effectiveness against indigenous rhizobium strains in the establishment of the symbiosis. Thus, in the present study, we evaluated the ability to improve drought tolerance in common bean plants of different indigenous rhizobia strains isolated from nearby crop fields in the Basque Country either affected by drought or salinity. The plants in this trial were grown in a climatic chamber under controlled conditions and exposed to values of 30% relative soil water content at the time of harvest, which is considered a severe drought. From the nine bacteria strains evaluated, three were found to be highly efficient under drought (namely 353, A12 and A13). These strains sustained high infectiveness (nodulation capacity) and effectiveness (shoot biomass production) under drought, even surpassing the plants inoculated with the CIAT899 reference strain, as well as the chemically N-fertilized plants. The tolerance mechanisms developed by plants inoculated with 353, A12 and A13 strains were a better adjustment of the cell wall elasticity that prevents mechanical damages in the plasma membrane, a higher WUE and an avoidance of the phenological delay caused by drought, developing a greater number of flowers. These results provide the basis for the development of efficient common bean inoculants able to increase the yield of this crop under drought conditions in the Northern Spain and, thus, to be used as biostimulants. In addition, the use of these efficient nitrogen fixation bacteria strains is a sustainable alternative to chemical fertilization, reducing cost and minimizing its negative impact on environment.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selected indigenous drought tolerant rhizobium strains as promising biostimulants for common bean in Northern Spain

et al. 2023

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“…2 (Sooriyaarachchi et al 2021), and in the case of beans it is decisive, since it has a negative effect on the morphophysiology of this plant (Chaves-Barrantes et al, 2018). Added to this, the availability of nutrients under conditions of water deficit is deficient, microbial activity is limited and the participation of microorganisms as stimulating agents of the nutrient cycle in the soil decreases (Santillana, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…One of the strategies that stands out is the use of biological inoculants based on plant growth promoting rhizobacteria (PGPR), whose foundation lies in the ability of some soil bacteria to colonize plant roots and promote their growth, helping them in addition to tolerating biotic and abiotic stress through various mechanisms (Lakshmanan et al, 2017). Some of these mechanisms correspond to the biological nitrogen fixation (BNF), through the formation of symbiotic structures such as nodules in the root of legumes to obtain available nitrogen (Colás-Sánchez et al, 2018); the production of exopolysaccharides (EPS); the synthesis of phytohormones such as indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC) deaminase, siderophores; and phosphate solubilization (Santillana, 2021).…”

Section: Introductionmentioning

confidence: 99%

Scopping review: use of biofertilizers and humic substances in Phaseolus vulgaris (Fabaceae) for dry zones

Aguirre-Pérez,

Suárez-Fragozo,

Arias-Sarabia

et al. 2023

Rev. Colomb. Cienc. Hortic

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The common bean crop in dry areas is affected by the climate change and the low availability of nutrients that limits its yield. The objective of this review was to analyze the scope of the scientific literature on the use of inoculants based on Plant growth promoting rhizobacteria (PGPR) and humic substances (HS) in sustainable agronomic management of common bean crop and drought tolerance, for the generation of recommendations applicable to the production cultivation in dry areas from low tropic. An exploratory review on the use of PGPR and SH in common bean was carried out, since the first publications until December 2022 in the databases: Science direct, SciElo, SpringerLink, Scopus, Pubmed and Proquest. The co-inoculation of rhizobia with other PGPR was the most frequent technique in the reviewed articles. However, the combined application with SH allows greater tolerance to the water stress caused by drought. Rhizobia species most reported as efficient were Rhizobium tropici, Rhizobium etli and the strain CIAT 899 (R. tropici). In addition, the strain CIAT 899 was found to be the most useful in inoculant formulations for common beans under drought conditions in Brazil. In Colombia, only one registered product based on Rhizobium phaseoli was found for common bean, although there are no reports of evaluation of this strain under drought stress conditions.

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Agrochemical inputs and management have a greater impact on common bean rhizobia diversity than drought

Canto

Grillo²,

Heath³

et al. 2023

Preprint

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Drought is one of the biggest problems for crop production and also affects the survival and persistence of soil rhizobia. The reduced presence of rhizobia limits the establishment of symbiosis and endangers the productivity of legumes, the main source of plant protein worldwide. Thus, the preservation of soil microbial diversity is essential because it can ameliorate crop response to stress by increasing the likelihood of the presence of stress-tolerant rhizobia and the chances of establishing effective symbiotic relationships. Aim Since the biodiversity can be affected by several factors including abiotic stress or cultural practices, the objective of this research was to evaluate the effect of water availability, plant genotypes and agricultural management on the presence, nodulation capacity and genotypic diversity of rhizobia. Method For that, a field experiment was conducted, with twelve common bean genotypes under irrigation and rain-fed conditions, both in conventional and organic management. Estimation of the number of viable rhizobia present in soils was performed before the crop establishment, whereas the nodule number and the strain diversity of nodule bacteria were determined at postharvest. Results Drought reduced the number of nodules and of isolated bacteria and their genetic diversity, although in a lesser extent than the agrochemical inputs related to conventional management. Conclusions Thus, the maintenance of diversity will be a key factor in the future, as problems caused by drought will be exacerbated by climate change.

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Mecanismos de inducción de rizobios para reducir el estrés por sequía en las leguminosas

Cited by 5 publications

References 61 publications

Selected indigenous drought tolerant rhizobium strains as promising biostimulants for common bean in Northern Spain

Selected indigenous drought tolerant rhizobium strains as promising biostimulants for common bean in Northern Spain

Scopping review: use of biofertilizers and humic substances in Phaseolus vulgaris (Fabaceae) for dry zones

Agrochemical inputs and management have a greater impact on common bean rhizobia diversity than drought

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