Abscisic acid metabolizing rhizobacteria decrease ABA concentrations in planta and alter plant growth

Belimov, Andrey A.; Dodd, Ian C.; Safronova, Vera I.; Думова, В. А.; Шапошников, А. И.; Ladatko, A.G.; Davies, W. J.

doi:10.1016/j.plaphy.2013.10.032

Cited by 136 publications

(83 citation statements)

References 43 publications

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“…Previous work has shown that soil inoculation with V. paradoxus 5C-2 benefited plant growth, especially when plants were exposed to drying soil, by influencing multiple physiological processes including decreasing ACC concentrations in the rhizosphere of potato (Belimov et al 2015) and xylem sap of pea (Belimov et al 2009), and enhancing the nitrogen fixing symbiosis between pea and rhizobia (Belimov et al 2009). Enhanced nutrient uptake by pea (Jiang et al 2012) and decreased concentrations of abscisic acid in tomato seedlings (Belimov et al 2014) were also observed in inoculated plants. However, whether V. paradoxus 5C-2 can protect plants from the effects of salt stress has not been tested.…”

Section: Introductionmentioning

confidence: 81%

“…Indeed, well fertilised pea plants inoculated with V. paradoxus 5C-2 had significantly lower root ABA concentrations and enhanced ABA degradation in lower leaves, which likely explained the lower stomatal resistance of inoculated plants (Jiang et al 2012). V. paradoxus 5C-2 also decreased shoot ABA concentrations of tomato seedlings grown in vitro (Belimov et al 2014). Attenuation of liming-induced stomatal closure in the ABA-deficient wilty pea mutant (Rothwell et al 2015) suggests an important role for ABA in mediating stomatal responses of pea to changes in rhizosphere elemental status, requiring further studies in salinised plants.…”

Section: Discussionmentioning

confidence: 99%

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Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Wang

Dodd

Belimov

et al. 2016

Functional Plant Biol.

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159

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Abstract. Although plant salt tolerance has been improved by soil inoculation with rhizobacteria containing the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase (which metabolises ACC, the immediate precursor of the phytohormone ethylene), it is not always clear whether ion homeostasis and plant water relations are affected. When pea (Pisum sativum L. cv. Alderman) was grown with 70 and 130 mM NaCl, the ACC-deaminase containing rhizobacterium Variovorax paradoxus 5C-2 increased total biomass by 25 and 54% respectively. Nutrient flow modelling showed that V. paradoxus 5C-2 increased K uptake and root to shoot K flow, but decreased Na flow and increased Na deposition in roots. Thus, shoot K + : Na + ratio increased following V. paradoxus 5C-2 inoculation. At 70 and 130 mM NaCl, rhizobacterial inoculation decreased stomatal resistance by 14 and 31% and decreased xylem balancing pressure by 7 and 21% respectively. Furthermore, rhizobacterial inoculation improved photosynthetic efficiency (F v /F m ) by 12 and 19% and increased maximal electron transport rate (ETR) by 18 and 22% at 70 and 130 mM NaCl respectively. Thus V. paradoxus 5C-2 mitigates salt stress by improving water relations, ion homeostasis and photosynthesis of pea plants, and may provide an economic means of promoting growth of plants exposed to salt stress.Additional keywords: ion homeostasis, maximal electron transport rate, nutrient flow modelling, photosynthetic efficiency, water relations.

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Section: Introductionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Wang

Dodd

Belimov

et al. 2016

Functional Plant Biol.

Self Cite

159

View full text Add to dashboard Cite

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“…In their natural habitat, plant tissues are often inhabited by numerous microbes that are important in providing resistance from phyto‐pathogen infections and improve growth via nitrogen fixation and phosphorus solubilization . These microbes also provide phytohormones such as ABA, jasmonic acid, GAs, auxin, and CKs to their host plants …”

Section: Mel Regulates Plant‐rhizomicrobial Interactionsmentioning

confidence: 99%

Phytomelatonin: Recent advances and future prospects

Kanwar

Zhou

2018

Journal of Pineal Research

166

109

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Melatonin (MEL) has been revealed as a phylogenetically conserved molecule with a ubiquitous distribution from primitive photosynthetic bacteria to higher plants, including algae and fungi. Since MEL is implicated in numerous plant developmental processes and stress responses, the exploration of its functions in plant has become a rapidly progressing field with the new paradigm of involvement in plants growth and development. The pleiotropic involvement of MEL in regulating the transcripts of numerous genes confirms its vital involvement as a multi‐regulatory molecule that architects many aspects of plant development. However, the cumulative research in plants is still preliminary and fragmentary in terms of its established functions compared to what is known about MEL physiology in animals. This supports the need for a comprehensive review that summarizes the new aspects pertaining to its functional role in photosynthesis, phytohormonal interactions under stress, cellular redox signaling, along with other regulatory roles in plant immunity, phytoremediation, and plant microbial interactions. The present review covers the latest advances on the mechanistic roles of phytomelatonin. While phytomelatonin is a sovereign plant growth regulator that can interact with the functions of other plant growth regulators or hormones, its qualifications as a complete phytohormone are still to be established. This review also showcases the yet to be identified potentials of phytomelatonin that will surely encourage the plant scientists to uncover new functional aspects of phytomelatonin in plant growth and development, subsequently improving its status as a potential new phytohormone.

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“…For example, IAA from Azospirillum brasilense Sp245 stimulates early plant development and increases significantly the plants and roots yield (in dry weight) and the N-uptake efficiency of wheat [71,80]. The ability to synthesize ABA, particularly under stressful conditions, for example, salinity, and to affect the ABA level in plants was detected in PGPB from the genera Azospirillum, Bacillus, Pseudomonas, Brevibacterium and Lysinibacillus [15,81,82]. Both plants and bacteria can be synthesized via several pathways, including the indole-3-pyruvic acid (IPA), indole-3-acetamide (IAM) and indole-3-acetonitrile (IAN) pathways, which are often regulated by tryptophan, carbon and nitrogen availability, a reduction in growth rate and abiotic factors such as temperature, pH and oxygen [79].…”

Section: Production Of Plant Hormones and Other Beneficial Plant Metamentioning

confidence: 99%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

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Free-living plant growth-promoting rhizobacteria (PGPR) have favourable effect on plant growth, tolerance against stresses and are considered as a promising alternative to inorganic fertilizer for promoting plant growth, yield and quality. PGPR colonize at the plant root, increase germination rates, promote root growth, yield, leaf area, chlorophyll content, nitrogen content, protein content, tolerance to drought, shoot and root weight, and delayed leaf senescence. Several important bacterial characteristics, such as biological nitrogen fixation, solubilization of inorganic phosphate and mineralization of organic phosphate, nutrient uptake, 1-aminocydopropane-1-carboxylic acid (ACC) deaminase activity and production of siderophores and phytohormones, can be assessed as plant growth promotion traits. By efficient use, PGPR is expected to contribute to agronomic efficiency, chiefly by decreasing costs and environmental pollution, by eliminating harmful chemicals. This review discusses various bacteria acting as PGPR, their genetic diversity, screening strategies, working principles, applications for wheat and future aspects in terms of efficiency, mechanisms and the desirable properties. The elucidation of the diverse mechanisms will enable microorganisms developing agriculture further.

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Abscisic acid metabolizing rhizobacteria decrease ABA concentrations in planta and alter plant growth

Cited by 136 publications

References 43 publications

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Phytomelatonin: Recent advances and future prospects

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

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