Growth, photosynthetic activity, and potassium and sodium concentration in rice plants under salt stress

Morales, Soledad García; Trejo-Téllez, Libia Iris; Merino, Fernando Carlos Gómez; Caldana, Camila; Espinosa-Victoria, David; Herrera-Cabrera, Braulio Edgar

doi:10.4025/actasciagron.v34i3.13687

Cited by 29 publications

(16 citation statements)

References 24 publications

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“…Increasing the salt concentration to 10 dS·m −1 resulted in an increase in the Na/K by a 32 fold in the susceptible genotype and 36 fold in the tolerant genotype, compared to the no-salt control (Table 7). A similar trend was reported in rice grown under salt stress [38]. Na/K ratio is an important consideration in salt tolerance and salt-stress alleviation because reducing Na ).…”

Section: Plant Tissue Chemical Characteristicssupporting

confidence: 59%

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

El-Sharkawy¹,

Al-Shal²,

Missaoui³

2017

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Salinity is a major impediment to crop production. This study was undertaken to compare the effect of seaweed extract, humic acid, and potassium sulfate nanoparticles in alleviating salt stress in Alfalfa (Medicago sativa L.). Seeds of ten alfalfa genotypes were germinated in a growth chamber at five salt concentrations (0%, 0.5%, 1.0%, 1.5%, and 2.00%). Salt concentrations above 1% reduced seed germination by more than 70% in most genotypes. One salt tolerant genotype (Mesa-Sirsa) and one salt sensitive (Bulldog 505) were selected and planted in greenhouse pots containing 2 kg of sand and subjected to two salt levels (10 and 15 dS·m . Plant biomass was reduced under both salt concentrations in both genotypes, with a greater magnitude in the salt sensitive genotype. Application of seaweed extract resulted in higher relative water content and proline under both salt concentrations (10 and 15 dS·m −1 ) in the salt sensitive genotype, and lower electrolyte leakage in both salt tolerant and salt sensitive genotypes, under both salt concentrations. Seaweed extract also resulted in higher catalase and SOD activities in both genotypes under 10 dS·m −1 . Catalase and SOD activities were associated with significantly (p < 0.01) reduced electrolyte leakage and increased shoot dry weight. Overall, seaweed extract seemed to have a positive effect in alleviating salt stress in alfalfa.

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Section: Plant Tissue Chemical Characteristicssupporting

confidence: 59%

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

El-Sharkawy¹,

Al-Shal²,

Missaoui³

2017

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“…Moreover, it differed from the results obtained for another rice cultivar, Três Rios, which presented a significant decrease in the fresh weight of aerial part and in the root already 100 mM salt concentration (Morales et al, 2012). According to Khare et al, (2015), the reduced biomass in rice under salt stress can be caused by the accumulation and effects of Na + and Cl − , indicates the inability of BRS AG cultivar to limit the ion absorption in its root and leaf tissue at high NaCl.…”

Section: Morphological Response Of Brs Ag Cultivar To Salt Stressmentioning

confidence: 57%

Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

Rossatto¹,

Maia²,

Amaral³

et al. 2018

Aust J Crop Sci

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About 20% of the cultivated land and almost half of the irrigated lands of the planet are affected by the salinization of the soil and the water. Rice cultivar BRS AG is the first grown for other purposes than human consumption and can be used in the production of ethanol and animal feed. The objective of this study was to evaluate the germination, morphological characteristics, proline accumulation, and the expression of the genes involved in the metabolism of proline in rice plants, cv. BRS AG, cultured in vitro under salt stress. The plants were cultivated in a culture MS medium with six different NaCl concentrations (0, 32, 68, 102, 136, 170 mM). The germination was evaluated at days 7 and 14, and morphological characteristics were analyzed only at day 21. For proline quantification and expression of the genes required for its metabolism (P5CS1, P5CS2, P5CR, OAT, P5CDH and PDH), two concentrations (136 mM and 0 mM) of NaCl were used, and the samples were collected at days 5, 10, 15, and 20. The results indicate that the growth of rice cv. BRS is completely impaired at 170 mM NaCl, and at 136 mM NaCl. Regarding proline content, in stressed plants, it was higher (1.24 mM g-1 MF) than in the control plants, and was directly related to a high expression observed for the P5CS2 (QR=5.50) and OAT (QR=5.44) genes at 20 days of stress, which explains the high proline concentration at this period. According to the results, rice cultivar BRS AG, is considered tolerant to salt stress.

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“…These results also agree with those obtained previously by another group. 26 Thus, the type II ISEs can be used for the direct measurement of ion concentrations and their localization in live intact rice plants.…”

Section: Measurements Of Na + and K + Ion Concentrations In Rice Plantsmentioning

confidence: 99%

Mass-producible disposable needle-type ion-selective electrodes for plant research

et al. 2019

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Growth, photosynthetic activity, and potassium and sodium concentration in rice plants under salt stress

Cited by 29 publications

References 24 publications

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

Morphophysiological analysis and expression of proline genes in rice (Oryza sativa L. cv. BRS AG) subjected to in vitro salt stress

Mass-producible disposable needle-type ion-selective electrodes for plant research

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