Combined effects of high relative humidity and K + supply mitigates damage caused by salt stress on growth, photosynthesis and ion homeostasis in J. curcas plants

Rodrigues, Cláudia Cristiane Filgueira Martins; Silveira, Joaquim Albenísio Gomes da; Viégas, Ricardo Almeida; Moura, Raniere M.; Aragão, Ricardo Evangelista Marrocos de; Silva, Evandro N.

doi:10.1016/j.agwat.2015.09.027

Cited by 13 publications

(9 citation statements)

References 53 publications

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“…A similar result was observed for olive cultivar "Koroneiki" that did not show difference in shoot elongation in response to different K + concentrations in hydroponic system [17]. Also, the supply with 10 mM of K + did not reduce the growth in Jatropha curcas plants [18].…”

Section: Figure 1: Shoot Height (A) Stem Diameter (B) Root Height (supporting

confidence: 70%

“…(Figure 4). Potassium can maintain higher gs and E values as long as the plants are watered [18,24]. Carya cathayensis plants cultivated with 5 mM of K + showed higher carbon assimilation and chlorophyll content at 60 days which supports the idea of the role of K + in the photosynthetic traits [7].…”

Section: Figure 1: Shoot Height (A) Stem Diameter (B) Root Height (supporting

confidence: 63%

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Initial growth and photosynthetic characteristics of Hymenaea courbaril plants submitted to different concentrations of potassium

et al. 2017

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The degradation of Cerrado biome has been increasing the demand for high quality tree seedlings, so that it is necessary to understand the nutritional requirements of these plants. Hymenaea courbaril L., known as jatobá, has a wide distribution that makes it an alternative of reforestation of degraded areas. The aim of the experiment was to evaluate H. courbaril initial growth and gas exchange characteristics under different potassium concentrations (K+). The experiment was arranged in a completely randomized design with five treatments (T0- 0, T1- 3, T2- 6, T3-9 e T4- 12 mM of K+) and four repetitions. Growth measurements were carried out every 15 days. SPAD index and gas exchange measurements were evaluated at 0, 30, and 60 days after treatment imposition. At the end of the experimental period, dry matter was evaluated, and root: shoot ratio (R:S) and Dickson quality index (DQI) were calculated The data were subjected to a one-way ANOVA and by Tukey’s test (P<0.05). The growth characteristics did not show significant difference with different concentrations of K+. At 0 and 30 days the photosynthetic traits were not different. However, at 60 days the absent- (T0), lower- (T1), and hyper- (T4) K+ concentration showed a reduction in SPAD index and gas exchanges parameters, confirming the role of this nutrient in the photosynthetic activity. Thus, regardless the K+ doses during 60 days, H. courbaril reached the growth requirements of field plantations. However, after this period the plant survival could be decreased in low K+ availability conditions.

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Section: Figure 1: Shoot Height (A) Stem Diameter (B) Root Height (supporting

confidence: 70%

Section: Figure 1: Shoot Height (A) Stem Diameter (B) Root Height (supporting

confidence: 63%

Initial growth and photosynthetic characteristics of Hymenaea courbaril plants submitted to different concentrations of potassium

et al. 2017

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“…The most prominent linear increase was recorded for K þ content in all three species irrespective of the salt treatment applied, which typically reached values about twice as high as those measured for the control treatments. This finding is of great importance for K þ /Na þ competition and homeostasis in plant tissues [41,42]. Hydrogel amendment reduced Na þ ion uptake, since its content generally decreased compared to the control substrate ( Fig.…”

Section: Dry Matter and Ion Contentmentioning

confidence: 80%

Effects of Hydrogel on Growth and Visual Damage of Ornamental Salvia Species Exposed to Salinity

Ljubojević

Ognjanov

Maksimović

et al. 2017

CLEAN Soil Air Water

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A greenhouse study at increasing salt concentrations (0, 25, 50, 75 and 100 mM NaCl) with or without hydrogel amendment was conducted during a 10‐week period in order to examine growth and aesthetic responses of three Salvia species. Subsequent analyses revealed that 25, 50 and 75 mM NaCl concentrations had a positive impact on the plant growth (plant height, plant width, fresh weight, and root system volume), while 100 mM NaCl implied a negative response. The positive effect of the hydrogel was most notable in the plant fresh and dry weight, K+ and Ca2+ content, and root system volume. The results further indicate that the amended hydrogel provided sufficient amount of available water and ions that are usually in competition and are limited by excessive Na+ ion amounts. The hydrogel also mitigated the negative influence of higher salt concentrations (75 and 100 mM NaCl), thereby decreasing leaf damage, defoliation, and petal loss, while also improving vitality and aesthetic value of S. farinacea and S. coccinea. In S. splendens, the hydrogel contributed to better vitality but slightly decreased decorativeness. Both qualitative (visual salt damage) and quantitative (growth) parameters proved to be reliable criteria for assessing salt tolerance of the studied Salvia species, while ion removal contributes to the understanding of salt tolerance mechanisms and possible usages.

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“…In addition to its economic potential, this species has shown adequate growth under adverse soil-climatic conditions. This suggests tolerance to abiotic stress, with the possibility of cultivation in areas with limited plant development (e.g., arid and semi-arid regions) and the ability to use nutrients efficiently (Silva et al, 2013;Garrone et al, 2016;Rodrigues et al, 2016). These characteristics make physic nut an excellent model to evaluate physiological responses regarding the tolerance of the species to abiotic stresses, such as low nutrient availability.…”

Section: Introductionmentioning

confidence: 99%

“…Although photosynthetic responses have been studied under stress conditions stemming from drought and temperature (Silva et al, 2013;Khan et al, 2016;Rodrigues et al, 2016), little is known about the regulation of this physiological process in the growth of plants tolerant to nutritional deficiency, such as the physic nut. The description of physiological disorders in deficient plants may indicate the nutritional strategies of physic nuts to tolerate nutritional deficiency before the appearance of visual symptoms.…”

Section: Introductionmentioning

confidence: 99%

Prognosis of physiological disorders in physic nut to N, P, and K deficiency during initial growth

Santos

Macedo

Zanchim

et al. 2017

Plant Physiology and Biochemistry

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The description of physiological disorders in physic nut plants deficient in nitrogen (N), phosphorus (P) and potassium (K) may help to predict nutritional imbalances before the appearance of visual symptoms and to guide strategies for early nutrient supply. The aim of this study was to evaluate the growth of physic nuts (Jatropha curcas L.) during initial development by analyzing the gas exchange parameters, nutrient uptake and use efficiency, as well as the nitrate reductase and acid phosphatase activities and polyamine content. Plants were grown in a complete nutrient solution and solutions from which N, P or K was omitted. The nitrate reductase activity, phosphatase acid activity, polyamine content and gas exchange parameters from leaves of N, P and K-deficient plants indicates earlier imbalances before the appearance of visual symptoms. Nutrient deficiencies resulted in reduced plant growth, although P- and K-deficient plants retained normal net photosynthesis (A), stomatal conductance (g) and instantaneous carboxylation efficiency (k) during the first evaluation periods, as modulated by the P and K use efficiencies. Increased phosphatase acid activity in P-deficient plants may also contribute to the P use efficiency and to A and gs during the first evaluations. Early physiological and biochemical evaluations of N-, P- and K-starved plants may rely on reliable, useful methods to predict early nutritional imbalances.

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Combined effects of high relative humidity and K + supply mitigates damage caused by salt stress on growth, photosynthesis and ion homeostasis in J. curcas plants

Cited by 13 publications

References 53 publications

Initial growth and photosynthetic characteristics of Hymenaea courbaril plants submitted to different concentrations of potassium

Initial growth and photosynthetic characteristics of Hymenaea courbaril plants submitted to different concentrations of potassium

Effects of Hydrogel on Growth and Visual Damage of Ornamental Salvia Species Exposed to Salinity

Prognosis of physiological disorders in physic nut to N, P, and K deficiency during initial growth

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