K+ starvation inhibits water-stress-induced stomatal closure

Benlloch-González, María; Arquero, Octavio; Fournier, José M.; Barranco, D.; Benlloch, M.

doi:10.1016/j.jplph.2007.05.010

Cited by 116 publications

(59 citation statements)

References 23 publications

(28 reference statements)

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“…The effects of drought stress on stomata closure in olive trees and sunflower plants were found to be dependent on the K + nutrient status [55,56]. When plants were supplied with different K + concentrations and then subjected to drought stress, their stomatal conductance was more markedly reduced in normal K plants than in low K plants (Table 3).…”

Section: The Role Of Potassium In Abiotic Stress Resistancementioning

confidence: 99%

The Critical Role of Potassium in Plant Stress Response

Wang

Zheng

Shen

et al. 2013

IJMS

1,333

829

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Agricultural production continues to be constrained by a number of biotic and abiotic factors that can reduce crop yield quantity and quality. Potassium (K) is an essential nutrient that affects most of the biochemical and physiological processes that influence plant growth and metabolism. It also contributes to the survival of plants exposed to various biotic and abiotic stresses. The following review focuses on the emerging role of K in defending against a number of biotic and abiotic stresses, including diseases, pests, drought, salinity, cold and frost and waterlogging. The availability of K and its effects on plant growth, anatomy, morphology and plant metabolism are discussed. The physiological and molecular mechanisms of K function in plant stress resistance are reviewed. This article also evaluates the potential for improving plant stress resistance by modifying K fertilizer inputs and highlights the future needs for research about the role of K in agriculture.

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Section: The Role Of Potassium In Abiotic Stress Resistancementioning

confidence: 99%

The Critical Role of Potassium in Plant Stress Response

Wang

Zheng

Shen

et al. 2013

IJMS

1,333

829

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“…These compounds, which can be assimilated by the bacteria directly from the ecosystem or produced by A. brasilense, have been isolated from A. brasilense in arid ecosystems (Riou et al, 1991;Altabe et al, 1994). Potassium is an important solute associated with the regulation of cell turgor and stomatal opening (Benlloch-González et al, 2008). Thus, according to the results of this study, there was a relationship between the regulation of cellular osmotic potential and the amount of K absorbed by the plants.…”

Section: Discussionmentioning

confidence: 61%

Effects of inoculation with Azospirillum brasilense on the quality of Prosopis juliflora seedlings

et al. 2012

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Inoculation of mycorrhizal fungi and rhizobacteria in plants can improve their growth and physiological status, which could be particularly important for agricultural and forestry plants used for the revegetation of arid areas. Prosopis juliflora is a forest pioneer species that is drought resistant and has multiple uses (fodder, shade and shelter for livestock; timber and firewood, live fences and windbreaks in agroforestry systems). Azospirillum brasilense is a rhizobacterium that improves the growth of many agricultural crops. The hypothesis of this study was that P. juliflora seedlings produced in the nursery can respond positively to inoculation with A. brasilense CECT 590. Five months after inoculation, we examined the growth, water relations (osmotic potential at full turgor, osmotic potential at zero turgor, and the modulus of elasticity at full turgor), and concentration and content of macronutrients (N, P, K, Ca and Mg) in the seedlings. Subsequently, a trial was conducted to analyse root growth potential. A. brasilense CECT 590 inoculation caused an osmotic adjustment in P. juliflora seedlings but decreased the elasticity of the cell walls. Inoculation with A. brasilense CECT 590 significantly improved plant growth due in part to an increase of N concentration in the seedlings. A. brasilense CECT 590 inoculation also caused an increase in the root growth potential. The increased growth of P. juliflora seedlings inoculated with A. brasilense was probably caused by more than one mechanism. Inoculation with A. brasilense at the nursery may be a suitable technique for producing improved seedling material for restoration purposes.Key words: PGPR; osmotic adjustment; elastic adjustment; mineral nutrition; nursery; root growth potential. Resumen La inoculación de Azospirillum brasilense mejora la calidad de las plántulas de un mezquite (Prosopis juliflora)La inoculación de hongos de micorrizacion y rizobacterias en las plantas puede mejorar su crecimiento y calidad fisiológica, especialmente en plantas agrícolas y forestales empleadas para la regeneración de zonas áridas. Prosopis juliflora es una especie forestal pionera, resistente a la sequía, y de usos múltiples (forraje, sombra y cobijo para el ganado, madera y leña, cercas vivas y cortinas cortavientos en sistemas agroforestales). Azospirillum brasilense es una rizobacteria que mejora el crecimiento de muchos cultivos agrícolas. La hipótesis de este estudio fue que las plántulas de P. juliflora producidas en vivero pueden responder positivamente a la inoculación con A. brasilense CECT 590. Cinco meses después desde la inoculación, se analizó el crecimiento, relaciones hídricas (potencial osmótico en saturación, potencial osmótico en el punto de pérdida de turgencia, y módulo de elasticidad a total turgor), concentración y contenido de macronutrientes (N, P, K, Ca y Mg) en las plántulas. Posteriormente se realizó un ensayo para analizar el Potencial de Crecimiento Radical. La inoculación de A. brasilense CECT 590 causó un ajuste osmótico de las ...

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“…It is well established that its application impact the performance of plants in a positive manner and also increase their water use efficiency (WUE) 19 , 20 . We transplanted the plantlets obtained after KNO 3 treatment to pots filled with vermiculite and further assessed for their ability to tolerate drought stress.…”

Section: Resultsmentioning

confidence: 99%

Semi-quantitative analysis of transcript accumulation in response to drought stress byLepidium latifoliumseedlings

Gupta

Singh

Pandey

et al. 2013

Plant Signaling & Behavior

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Cross-amplification of five Arabidopsis abiotic stress-responsive genes (AtPAP, ZFAN, Vn, LC4 and SNS) in Lepidium has been documented in plants raised out of seeds pre-treated with potassium nitrate (KNO3) for assessment of enhanced drought stress tolerance. cDNA was synthesized from Lepidium plants pre-treated with KNO3 (0.1% and 0.3%) and exposed to drought conditions (5% and 15% PEG) at seedling stage for 30 d. Transcript accumulation of all the five genes were found suppressed in set of seedlings, which were pre-treated with 0.1% KNO3 and were exposed to 15% PEG for 30 d. The present study establishes that different pre-treatments may further enhance the survivability of Lepidium plants under conditions of drought stress to different degrees.

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K+ starvation inhibits water-stress-induced stomatal closure

Cited by 116 publications

References 23 publications

The Critical Role of Potassium in Plant Stress Response

The Critical Role of Potassium in Plant Stress Response

Effects of inoculation with Azospirillum brasilense on the quality of Prosopis juliflora seedlings

Semi-quantitative analysis of transcript accumulation in response to drought stress byLepidium latifoliumseedlings

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