Photosynthetic Response Mechanism of Soil Salinity-Induced Cross-Tolerance to Subsequent Drought Stress in Tomato Plants

Yang, Xiaolong; Li, Yangyang; Chen, Hangbing; Huang, Juan; Zhang, Yumeng; Qi, Mingfang; Liu, Yufeng; Li, Tianlai

doi:10.3390/plants9030363

Cited by 38 publications

(31 citation statements)

References 43 publications

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“…In general, plants irrigated with highsalinity water tend to exhibit morphological, physiological, biochemical and molecular alterations to survive in stressful environments, through mechanisms of accumulation of osmoprotectants, water use efficiency, enhanced photosynthesis, detoxification of reactive oxygen species (ROS) and phytohormone induction (Evelin, Devi, Gupta, & Kapoor, 2019;Dias et al, 2018a;Fricke, 2020). Nevertheless, these adaptive strategies are inefficient to cope with the osmotic and ionic effects, which induce a reduction in chloroplast pigments and in the photosynthesis, growth and production of crops (Yang et al, 2020). Oliveira et al (2018) found that irrigation with 4.5 dS m-1 saline water reduces growth and production in bell pepper.…”

Section: Introductionmentioning

confidence: 99%

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Veloso¹,

Lima²,

Silva³

et al. 2021

Semina: Ciênc. Agrár.

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The use of saline water for irrigation in semi-arid regions has become a reality due to the water scarcity that occurs in most of the year. In this scenario, exogenous application of salicylic acid may be a strategy to mitigate the deleterious effects of salt stress on plants and ensure the production of socioeconomically important crops in the semiarid region of Northeast Brazil, such as bell pepper. Thus, this study examines the osmoprotective effect of salicylic acid on gas exchanges, chloroplast pigments and production components of ‘All Big’ bell pepper plants irrigated with water with different saline levels. The experiment was carried out in greenhouse conditions in Campina Grande - PB, Brazil. Treatments consisted of four levels of electrical conductivity on the irrigation water (0.8, 1.6, 2.4 and 3.2 dS m-1) and four concentrations of salicylic acid (0, 1.2, 2.4 and 3.6 mM), which were distributed in a 4 × 4 factorial arrangement in a randomized block design with three replicates. Increases in irrigation water salinity from 0.8 dS m-1 resulted in changes in gas exchange and total chlorophyll levels of ‘All Big’ bell pepper plants. The estimated salicylic acid concentration of 1.7 mM reduced the effects of salinity on stomatal conductance, transpiration, CO2 assimilation rate, instantaneous carboxylation efficiency, total chlorophyll and fruit diameters. Irrigation with water of 1.8, 0.8 and 1.6 dS m-1 salinity associated with the estimated salicylic acid concentration of 1.6 mM increased the biosynthesis of chlorophylls a and b and the number of fruits, respectively, in bell pepper plants.

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Section: Introductionmentioning

confidence: 99%

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Veloso¹,

Lima²,

Silva³

et al. 2021

Semina: Ciênc. Agrár.

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“…Salt stress induces various biochemical and physiological responses in plants and affects most of plant metabolic processes [ 1 , 4 ]. Alterations in the integrity of cell membranes [ 5 ], as well as inhibition of different enzymatic activities and photosynthesis [ 6 , 7 , 8 ], are among the main processes affected. In addition, plants exposed to saline soils trigger generation of reactive oxygen species (ROS), which in turn have a negative oxidative stress effect on cellular structures and metabolism [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Assimilation, Isotope Discrimination, Proline and Lipid Peroxidation Contribution to Barley (Hordeum vulgare) Salinity Tolerance

Vasilakoglou

Dhima

Γιαννακούλα

et al. 2021

Plants

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Barley (Hordeum vulgare L.) exhibits great adaptability to salt tolerance in marginal environments because of its great genetic diversity. Differences in main biochemical, physiological, and molecular processes, which could explain the different tolerance to soil salinity of 16 barley varieties, were examined during a two-year field experiment. The study was conducted in a saline soil with an electrical conductivity ranging from 7.3 to 11.5 dS/m. During the experiment, a number of different physiological and biochemical characteristics were evaluated when barley was at the two- to three-nodes growing stage (BBCH code 32–33). The results indicated that there were significant (p < 0.001) effects due to varieties for tolerance to salinity. Carbon isotopes discrimination was higher by 11.8% to 16.0% in salt tolerant varieties than that in the sensitive ones. Additionally, in the tolerant varieties, assimilation rates of CO2 and proline concentration were 200% and up to 67% higher than the sensitive varieties, respectively. However, in sensitive varieties, hydrogen peroxide and lipid peroxidation were enhanced, indicating an increased lipid peroxidation. The expression of the genes Hsdr4, HvA1, and HvTX1 did not differ among barley varieties tested. This study suggests that the increased carbon isotopes discrimination, increased proline concentration (play an osmolyte source role), and decreased lipid peroxidation are traits that are associated with barley tolerance to soil salinity. Moreover, our findings that proline improves salt tolerance by up-regulating stress-protective enzymes and reducing oxidation of lipid membranes will encourage our hypothesis that there are specific mechanisms that can be co-related with the salt sensitivity or the tolerance of barley. Therefore, further research is needed to ensure the tolerance mechanisms that exclude NaCl in salt tolerant barley varieties and diminish accumulation of lipid peroxides through adaptive plant responses.

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“…These results are in line with other studies on the effects of saline stress and water deficit on photosynthesis (Chen et al, 2016 , 2017 ; Yi et al, 2018 ; Tsai et. al., 2019 ; Grieco et al, 2020 ; Yang et al, 2020 ; see also review by Acosta-Motos et al, 2017 ). Interestingly, in the snrk2.10 lines, the changes appeared earlier than in wt plants indicating that the excitonic pressure-inducing mechanisms dissipating excess of absorbed light energy was higher in those lines.…”

Section: Discussionmentioning

confidence: 99%

The SnRK2.10 kinase mitigates the adverse effects of salinity by protecting photosynthetic machinery

et al. 2021

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SNF1-Related protein Kinases type 2 (SnRK2) are plant-specific enzymes widely distributed across the plant kingdom. They are key players controlling abscisic acid (ABA)-dependent and -independent signaling pathways in the plant response to osmotic stress. Here we established that SnRK2.4 and SnRK2.10, ABA-non activated kinases, are activated in Arabidopsis thaliana rosettes during the early response to salt stress and contribute to leaf growth retardation under prolonged salinity but act by maintaining different salt-triggered mechanisms. Under salinity, snrk2.10 insertion mutants were impaired in the reconstruction and rearrangement of damaged core and antenna protein complexes in photosystem II (PSII), which led to stronger non-photochemical quenching, lower maximal quantum yield of PSII, and lower adaptation of the photosynthetic apparatus to high light intensity. The observed effects were likely caused by disturbed accumulation and phosphorylation status of main PSII core and antenna proteins. Finally, we found higher accumulation of reactive oxygen species (ROS) in the snrk2.10 mutant leaves under a few-day-long exposure to salinity which also could contribute to the stronger damage of the photosynthetic apparatus and cause other deleterious effects affecting plant growth. We found that the snrk2.4 mutant plants did not display substantial changes in photosynthesis. Overall, our results indicate that SnRK2.10 is activated in leaves shortly after plant exposure to salinity and contributes to salt stress tolerance by maintaining efficient photosynthesis and preventing oxidative damage.

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Photosynthetic Response Mechanism of Soil Salinity-Induced Cross-Tolerance to Subsequent Drought Stress in Tomato Plants

Cited by 38 publications

References 43 publications

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Attenuation of salt stress on the physiology and production of bell peppers by treatment with salicylic acid

Carbon Assimilation, Isotope Discrimination, Proline and Lipid Peroxidation Contribution to Barley (Hordeum vulgare) Salinity Tolerance

The SnRK2.10 kinase mitigates the adverse effects of salinity by protecting photosynthetic machinery

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