Effect of Soil Moisture and Potassium Fertilizer on Shoot Water Potential, Photosynthesis and Partitioning of Carbon in Mungbean and Cowpea

Sangakkara, U. R.; Frehner, Monika; Nösberger, J.

doi:10.1046/j.1439-037x.2000.00422.x

Cited by 133 publications

(76 citation statements)

References 17 publications

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“…2 and Table S1). K is involved in the plant-water relationship (24) through plant osmotic control (24)(25)(26) and improvement in stomatal function (27). The present ecometabolomic study also demonstrates a shift in the metabolome of E. multiflora in response to the treatment representing moderate climatic change (Figs.…”

Section: Discussionmentioning

confidence: 99%

“…These metabolomic differences were accompanied by an increase in K content, resulting in low C/K and N/K ratios and high K/P ratios that also were observed in summer (the drought season) (Figs. 2 and 4) and seem to be related to the improvement in the control of water use (25,27). The means of the drought-treated plants of winter and autumn in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Strong relationship between elemental stoichiometry and metabolome in plants

Rivas‐Ubach

Sardans

Pérez‐Trujillo

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

231

209

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Shifts in the elemental stoichiometry of organisms in response to their ontogeny and to changing environmental conditions should be related to metabolomic changes because elements operate mostly as parts of molecular compounds. Here we show this relationship in leaves of Erica multiflora throughout their seasonal development and in response to moderate experimental field conditions of drought and warming. The N/P ratio in leaves decreased in the metabolically active growing seasons, coinciding with an increase in the content of primary metabolites. These results support the growthrate hypothesis that states that rapidly growing organisms present low N/P ratios because of the increase in allocation of P to RNA. The foliar N/K and P/K ratios were lower in summer and in the drought treatment, in accordance with the role of K in osmotic protection, and coincided with the increase of compounds related to the avoidance of water stress. These results provide strong evidence of the relationship between the changes in foliar C/N/P/K stoichiometry and the changes in the leaf's metabolome during plant growth and environmental stress. Thus these results represent a step in understanding the relationships between stoichiometry and an organism's lifestyle.climate change | metabolomics | ecometabolomics | Mediterranean climate

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Strong relationship between elemental stoichiometry and metabolome in plants

Rivas‐Ubach

Sardans

Pérez‐Trujillo

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

231

209

View full text Add to dashboard Cite

show abstract

“…Potassium increases the photosynthetic rates of crop leaves, CO 2 assimilation and facilitating carbon movement [15]. The high concentration of K + is thought to be essential for normal protein synthesis.…”

Section: Potassiummentioning

confidence: 99%

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Sawan¹

2014

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The increase in the population in Egypt makes it imperative to explore promising approaches to increase food supply, including protein and oil, to meet the needs of the Egyptian people. Cotton is the principal crop of Egyptian agriculture, it is grown mainly for its fiber, but cottonseed products are also of economic importance. Cottonseed is presently the main source of edible oil and meal for livestock in Egypt. Economic conditions in modern agriculture demand high crop yields in order to be profitable and consequently meet the high demand for food that comes with population growth. Oil crop production can be improved by development of new high yielding varieties, and the application of appropriate agronomic practices. There is limited information about the most suitable management practice for application of N, P, K, Zn, Ca and PGRs in order to optimize the quantity and quality of oil and protein of cottonseed. In maximizing the quantity and quality of a crop's nutritional value in terms of fatty acids and protein, field experiments were conducted to investigate the effect of nitrogen, phosphorus, potassium, foliar application of zinc and calcium, the use of plant growth retardants (Pix, Cycocel or Alar), on cottonseed, protein, oil yields, and oil properties of Egyptian cotton. From the findings of this study, it seems rational to recommend that application of N, P, K, foliar application of Zn and Ca, the use of PGRs (Pix, Cycocel or Alar), could bring about better impact on cottonseed yield, seed protein content, oil and protein yields, oil refractive index, unsaponifiable matter, and unsaturated fatty acids in comparison with the ordinary cultural practices adopted by Egyptian cotton producers.

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“…Mengel and Kirkby (2001) reported that K improves physiological processes by the regulation of turgor pressure and photosynthesis; translocation of cations and enzymes activation, while, Cakmak (2005) also observed that plant suffering from drought stress required more internal K. In legumes, devastating effects of drought can be alleviated by rich K supply (Sangakkara et al. 2000).…”

Section: Introductionmentioning

confidence: 99%

Potassium applied under drought improves physiological and nutrient uptake performances of wheat (Triticum Aestivun L.)

Raza

Saleem

Shah

et al. 2013

J. Soil Sci. Plant Nutr.

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The physiological and nutrient uptake performance of two wheat (Triticum aestivum L.) cultivars (Lasani-2008 and Auqab-2000) to foliar application of 1% potassium (K) at three different growth stages (tillering, flower initiation and grain filling) was investigated under water limited environment in a wire house experiment at the Nuclear Institute for Agriculture and Biology, Faisalabad. The aim was to find out the best K application stage for improvement in drought tolerance potential. Drought stress was created by withholding irrigation at the three growth stages and then K was sprayed with carboxymethyl cellulose as a sticking agent, whereas Tween-20 was used as a surfactant for foliar spray. At maturity, aboveground nitrogen, phosphorus, K, sodium and calcium uptakes by the crop were measured. Besides, water potential, osmotic potential and turgor potential of crop were also estimated. The results indicated that the drought stress at all three critical growth stages of wheat adversely affected plant's nutrient uptake, water potential, osmotic potential and turgor potential of wheat plants. The exogenous application of K under drought stress at all three critical growth stages enhanced tolerance of wheat by reducing toxic nutrient's uptake and improving the physiological efficiency. In this regards, both varieties showed uniform behavior. Maximum improvement in all the recorded nutrients uptake and physiological parameters was achieved when K was applied at grain filling stage of both cultivars.

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Effect of Soil Moisture and Potassium Fertilizer on Shoot Water Potential, Photosynthesis and Partitioning of Carbon in Mungbean and Cowpea

Cited by 133 publications

References 17 publications

Strong relationship between elemental stoichiometry and metabolome in plants

Strong relationship between elemental stoichiometry and metabolome in plants

Cottonseed yield and its quality as affected by mineral fertilizers and plant growth retardants

Potassium applied under drought improves physiological and nutrient uptake performances of wheat (Triticum Aestivun L.)

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