Quantitative limitations to photosynthesis in K deficient sunflower and their implications on water-use efficiency

Jákli, Bálint; Tavakol, Ershad; Tränkner, Merle; Şenbayram, Mehmet; Dittert, Klaus

doi:10.1016/j.jplph.2016.11.010

Cited by 88 publications

(65 citation statements)

References 68 publications

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“…This dose increased the organic feedstock, resulting in greater stomatal conductance values of plants, but always lower than the average value of 0.2414 mol m -2 s -1 between the plants irrigated with water of lower salinity ( Figure 1A). This situation, according to Wang et al (2013) and Jákli et al (2017), is a response of the stomatal closure in saline stressed plants, with strategies to reduce water loss through transpiration, as also recorded by Tatagiba et al (2014) and Prazeres et al (2015), who studied photosynthetic limitations of tomato plants (Solanum lycopersicum) and cowpeas (Vigna unguiculata) subjected to salt stress ranging from 0 to 15 dS m -1 of NaCl and 0.8 to 5.0 dS m -1 , respectively. The behavior of the data agrees with Freire et al (2014), who concluded that stomatal conductance in yellow passion fruit plants was significantly harmed by increasing water salinity from 0.5 to 4.5 dS m -1 but diverges from Nascimento et al (2011) after verifying that the biofertilizer attenuated the deleterious effects of the salts of the irrigation water due to the improvement of the nutritional state of the plants.…”

Section: Resultsmentioning

confidence: 79%

“…This variable, obtained by the ratio between photosynthesis and transpiration, indicates the amount of carbon the plant fixes by the amount of water lost during the transpiration process (Jákli et al, 2017). Thus, the lower values in the WUE are reflections of the increases in the transpiration rate of the plants in the first harvest (Figure 2A).…”

Section: Resultsmentioning

confidence: 99%

“…The greater stomatal opening ( Figure 1B) and transpiration rate (Figure 2A) in the first crop associated with higher internal carbon concentration in the treatments with potassium chloride coated with polymers ( Figure 4A) favored the entry and fixation of CO 2 in the leaf mesophyll, stimulating photosynthesis (Jákli et al, 2017) and in effect contributing to raise crop productivity in the first harvest.…”

Section: Resultsmentioning

confidence: 99%

“…When evaluating Pearson's correlations between the transpiration of plants with stomatal conductance and net photosynthesis, strong correlations were found between the variables, with values of 0.632 and 0.677, respectively. This situation indicates that the higher productivity is related to greater stomatal opening, which is expressed by the transpiration rate and results in greater stomatal conductance that stimulates photosynthesis and exerts a positive effect on the productive capacity of the plants (Parihar et al, 2015;Jákli et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

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Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Nunes

Cavalcante

Pereira

et al. 2017

Ciencia e investigación agraria

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. 2017. Gas exchange and productivity of yellow passion fruit irrigated with saline water and fertilized with potassium and biofertilizer. Cien. Inv. Agr. 44(2): 168-183. The salinity of irrigation water can affect the growth and development of most plants of commercial interest. Aiming to study these aspects in passion fruit culture, an experiment was performed to evaluate the effects of bovine biofertilizer and potassium fertilization on gas exchange and production of the passion fruit 'BRS Giant Yellow' irrigated with non-saline and saline water. The treatments were arranged in randomized blocks with sub-subdivided plots using the 2×(3×5) scheme, which refers to two levels of electrical conductivity of the irrigation water as the main plot (0.35 and 4.00 dS m -1 ) and the combination of three potassic fertilization practices (without fertilization, fertilized with conventional and slow release KCl) with five doses of bovine biofertilizer (0, 25, 50, 75 and 100% of dose of 15 L m -2 ) in the subplots, with three replicates and 12 plants per plot. The physiological variables and the productivity were evaluated in two harvests, and the data were submitted to statistical evaluation of samples repeated in time. The application of bovine biofertilizer and potassium in soil with a sandy texture irrigated with saline water did not inhibit the degenerative effect of the salts on the photosynthetic rates of the plants. The salinity of the irrigation water reduced stomatal conductance, transpiration and net photosynthesis of the plants, but in the second crop, the instantaneous water use efficiency was higher. Although the productivity decreased from the first to the second harvest, the biofertilizer associated with potassic fertilization increased the yield of the crop, which surpassed the average of Brazil, the Brazilian Northeast and the State of Paraiba, Brazil.

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Nunes

Cavalcante

Pereira

et al. 2017

Ciencia e investigación agraria

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“…De acuerdo con el modelo de regresión Ŷ =89,5217 -0,7813N**+0,1634K+0,0049N 2 **-0,0016NK*, se determinó que, para llegar al máximo valor de la g s en albahaca (65,13 mmol CO 2 m -2 s -1 ), se necesitan 190 y 237,5 kg ha -1 de N y K, respectivamente. En ese sentido, Jákli et al (2017) indican que con frecuencia la g s se reduce bajo deficiencia de K; sin embargo, los autores indican que algunos estudios cuestionan la causalidad directa entre la deficiencia de K y el cierre estomático. Por lo tanto, una disminución de la g s no reflejaría necesariamente una baja capacidad para el control de apertura y cierre estomático, pero podría ser el resultado de un ajuste de los estomas a la reducción de la utilización de CO 2 por la fotosíntesis.…”

Section: Resultados Y Discusiónunclassified

Efecto del nitrógeno y el potasio sobre el intercambio gaseoso y la distribución de biomasa en albahaca (<i>Ocimum basillicum</i> L.)

Combatt¹,

Pérez²,

Jarma‐Orozco³

2018

Rev. Colomb. Cienc. Hortic.

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Efecto del nitrógeno y el potasio sobre el intercambio gaseoso y la distribución de biomasa en albahaca (Ocimum basillicum L.)Effect of nitrogen and potassium on gaseous exchange and biomass distribution in basil (Ocimum basillicum L.) ENRIQUE COMBATT C. RESUMENLa albahaca es considerada una planta promisoria de reciente explotación en Colombia, pero entre las limitaciones para su expansión, se encuentra la implementación de un plan de nutrición con la aplicación de nitrógeno y potasio, que permita el incremento y sostenibilidad de la producción. El objetivo del trabajo fue determinar el efecto de la fertilización con nitrógeno y potasio sobre variables de intercambio gaseoso, ganancia de biomasa e índice de cosecha (IC) de la albahaca (Ocimum basillicum L.) cv. Nufar F1. La investigación fue realizada en condiciones de umbráculo en la Facultad de Ciencias Agrícolas de la Universidad de Córdoba, Colombia. Se utilizó una matriz Box-Berard aumentada 3 (2 k +2k+2k+1+1), para la obtención de combinaciones de nitrógeno y potasio. Las respuestas de intercambio gaseoso evaluadas fueron: tasa de fotosíntesis, conductancia estomática y concentración interna de CO 2 . En cuanto a biomasa, se evaluó masa seca de raíz, tallo, hoja e índice de cosecha. Los resultados más relevantes indicaron que las máximas tasas de fotosíntesis (17,3 μmol CO 2 m -2 s -1 ) fue observada aplicando 190 kg ha -1 N y 12,5 kg ha -1 K, en tanto que la conductancia estomática fue mayor (65,13 mmol CO 2 m -2 s -1 ), con la misma dosis de N pero con dosis de K de 237,5 kg ha -1 . Los valores más altos de masa seca de raíces, tallos y hojas fueron encontradas con las máximas dosis de N (190 kg ha -1 ), aunque para el potasio las combinaciones que incrementaron la mayor acumulación de biomasa en raíces, tallos y hojas fueron 180,69; 237,5 y 12,5 kg ha -1 , respectivamente.Palabras clave adicionales: nutrición mineral, plantas medicinales, variables fisiológicas, masa seca.

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Potassium deficiency reduces sugar yield in sugar beet through decreased growth of young plants

Füllgrabe

Claassen

Hilmer

et al. 2022

J. Plant Nutr. Soil Sci.

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Background Optimum potassium (K) nutrition is essential for high sugar yield and quality of beet crops. Aims We quantified the effect of potassium deficiency on sugar beet dry matter and sugar yield formation during the growing season. Methods Sugar beets were grown on low, medium, and high soil K concentrations in a long‐term K fertilizer field experiment on a silt loam alluvial soil. Plants were harvested at four time points during the growing season, including the final harvest. At each harvest, the dry matter yield and K concentration of leaves and beets (when applicable) were recorded, allowing us to study their growth rates in different growth phases. At the final harvest, sugar concentration and internal beet quality were measured. Results Low soil K concentrations resulted in an approximately 10% lower sugar yield compared to high soil K supply. Interestingly, retarded growth of low K plants already occurred during the germination phase and in the first weeks thereafter, whereas later on, growth rates were similar. Higher soil K levels led to an increased K uptake rate and thus a higher final total K uptake. High K plants showed rapid youth growth and reached their maximum growth rates earlier than plants grown under low K conditions. The initial differentiation between the low and high K treatments persisted because the plants subsequently grew at similar growth rates at both low and high soil K supplies. Conclusion The early growth reduction in the low K treatment was probably caused by the low amount of K stored in sugar beet seeds in combination with low K availability in the soil. It is concluded that under overall low soil K conditions, adequate amounts of K fertilizer should be applied to meet the demand of sugar beet seedlings for maximum growth and final sugar yield. Banded K fertilizer application next to the plant rows is supposed to be efficient for this purpose.

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Quantitative limitations to photosynthesis in K deficient sunflower and their implications on water-use efficiency

Cited by 88 publications

References 68 publications

Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Intercambio de gas y productividad de maracuyá amarillo irrigado bajo salinidad y fertilizado con potasio y biofertilizante

Efecto del nitrógeno y el potasio sobre el intercambio gaseoso y la distribución de biomasa en albahaca (<i>Ocimum basillicum</i> L.)

Potassium deficiency reduces sugar yield in sugar beet through decreased growth of young plants

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