Salinity acclimation ameliorates salt stress in tomato (Solanum lycopersicum L.) seedlings by triggering a cascade of physiological processes in the leaves

Kamanga, Rowland M.; Echigo, Kohei; Yodoya, Kensuke; Mekawy, Ahmad Mohammad M.; Ueda, Akihiro

doi:10.1016/j.scienta.2020.109434

Cited by 26 publications

(20 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were clear differences between the control and salinitystressed seedlings. Changes in leaf phenotype and roots of plants subjected to salinity stress and a decrease in fresh shoot weight of scions were previously observed in watermelon, Arabidopsis, lettuce, and tomato (Kamanga et al, 2020;Rolly et al, 2020;Shin et al, 2020a;Song et al, 2020). In addition, the poor growth status showing leaf deformation and stunted seedling growth under drought stress conditions was similar to the previous report by Zhang et al (2011) that might be due to physiological changes in the leaves, nodes, and stems, including decreased chlorophyll content and inhibition of photosynthesis due to lack of water (Zhang et al, 2019).…”

Section: Effect Of Salt Temperature and Drought Stress On Growth Parametersmentioning

confidence: 60%

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

2021

View full text Add to dashboard Cite

Chlorophyll fluorescence (CF) is used to measure the physiological status of plants affected by biotic and abiotic stresses. Therefore, we aimed to identify the changes in CF parameters in grafted watermelon seedlings exposed to salt, drought, and high and low temperatures. Grafted watermelon seedlings at the true three-leaf stage were subjected to salinity levels (0, 50, 100, 150, and 200 mM) and temperature [low (8°C), moderate (24°C), and high (40°C)] stresses for 12 days under controlled environmental conditions independently. Eight CF parameters were measured at 2-day intervals using the FluorCam machine quenching protocol of the FluorCam machine. The seedlings were also exposed to drought stress for 3 days independent of salinity and temperature stress; CF parameters were measured at 1-day intervals. In addition, growth parameters, proline, and chlorophyll content were evaluated in all three experiments. The CF parameters were differentially influenced depending on the type and extent of the stress conditions. The results showed a notable effect of salinity levels on CF parameters, predominantly in maximum quantum yield (Fv/Fm), non-photochemical quenching (NPQ), the ratio of the fluorescence decrease (Rfd), and quantum yield of non-regulated energy dissipation in PSII [Y(NO)]. High temperature had significant effects on Rfd and NPQ, whereas low temperature showed significant results in most CF parameters: Fv/Fm, Y(NO), NPQ, Rfd, the efficiency of excitation capture of open photosystem II (PSII) center (Fv′/Fm′), and effective quantum yield of photochemical energy conversion in PSII [Y(PSII)]. Only NPQ and Rfd were significantly influenced by severe drought stress. Approximately, all the growth parameters were significantly influenced by the stress level. Proline content increased with an increase in stress levels in all three experiments, whereas the chlorophyll (a and b) content either decreased or increased depending upon the stressor. The results provided here may be useful for understanding the effect of abiotic stresses on CF parameters and the selection of index CF parameters to detect abiotic stresses in grafted watermelon seedlings.

show abstract

Section: Effect Of Salt Temperature and Drought Stress On Growth Parametersmentioning

confidence: 60%

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

2021

View full text Add to dashboard Cite

show abstract

“…The decrease in chlorophyll content when the plants were not subjected to saline stress is attributed to the fact that nanoparticles can generate oxidative stress depending on their characteristics and the cultured species, and induce peroxidation of the chloroplast membrane and degradation of the photosynthetic pigments [ 25 ]. By subjecting the plants to saline stress, osmotic stress is also generated, which limits water access to the plants, which leads to loss of turgor and cell dehydration, in addition to causing ionic toxicity and nutritional imbalance and increasing generation excessive ROS, which are potentially toxic and harmful radicals capable of causing oxidative damage to proteins, DNA, and lipids [ 7 ]. However, NPs have the ability to increase the content of chlorophylls, which results in a decrease in ROS levels, and a greater photochemical efficiency [ 10 ].…”

Section: Discussionmentioning

confidence: 99%

“…Currently, approximately 20% of the total irrigated lands cultivated in the world are affected by salinity and it is estimated that by 2050 it will exceed 50% [ 6 ]. This represents a great problem when producing agricultural crops, since, as a consequence of saline stress, osmotic stress is generated, which limits water access to plants, which produces a series of problems such as loss of turgor and cellular dehydration, ionic toxicity, nutritional imbalance, in addition to increasing the production of reactive oxygen species (ROS) [ 7 ]. Among the main ROS are superoxide (O 2 − ), hydrogen peroxide (H 2 O 2 ) and hydroxyl radical (OH − ), which can affect different structures at the cellular level such as proteins, lipids, DNA and cause cell damage [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Three Nanoparticles (Se, Si and Cu) on the Bioactive Compounds of Bell Pepper Fruits under Saline Stress

González‐García

Cárdenas-Álvarez

Cadenas‐Pliego³

et al. 2021

Plants

View full text Add to dashboard Cite

The bell pepper is a vegetable with high antioxidant content, and its consumption is important because it can reduce the risk of certain diseases in humans. Plants can be affected by different types of stress, whether biotic or abiotic. Among the abiotic factors, there is saline stress that affects the metabolism and physiology of plants, which causes damage, decreasing productivity and quality of fruits. The objective of this work was to evaluate the application of selenium, silicon and copper nanoparticles and saline stress on the bioactive compounds of bell pepper fruits. The bell pepper plants were exposed to saline stress (25 mM NaCl and 50 mM) in the nutrient solution throughout the crop cycle. The nanoparticles were applied drenching solution of these to substrate (Se NPs 10 and 50 mg L−1, Si NPs 200 and 1000 mg L−1, Cu NPs 100 and 500 mg L−1). The results show that saline stress reduces chlorophylls, lycopene, and β-carotene in leaves; but increased the activity of some enzymes (e.g., glutathione peroxidase and phenylalanine ammonia lyase, and glutathione). In fruits, saline stress decreased flavonoids and glutathione. The nanoparticles increased chlorophylls, lycopene and glutathione peroxidase activity in the leaves; and ascorbate peroxidase, glutathione peroxidase, catalase and phenylalanine ammonia lyase activity, and also phenols, flavonoids, glutathione, β-carotene, yellow carotenoids in fruits. The application of nanoparticles to bell pepper plants under saline stress is efficient to increase the content of bioactive compounds in fruits.

show abstract

“…Many reports have shown that the proline concentration increases in the shoots of plants grown under saline conditions ( Vicente et al, 2004 ; Amini and Ehsanpour, 2005 ; Roy et al, 2014 ). Plants accumulate proline as a non-toxic and protective compatible solute, which participates in cytosolic osmotic adjustments and balances osmotic pressure differences between the cytosol and vacuoles ( Parida and Das, 2005 ; Munns and Tester, 2008 ; Kamanga et al, 2020 ). Additionally, proline acts as an energy supplier and a signaling/regulatory molecule that can activate responses involved in the adaptation process, which helps to improve salinity tolerance ( Maggio et al, 2002 ).…”

Section: Discussionmentioning

confidence: 99%

Habitat-adapted heterologous symbiont Salinispora arenicola promotes growth and alleviates salt stress in tomato crop plants

et al. 2022

View full text Add to dashboard Cite

To ensure food security given the current scenario of climate change and the accompanying ecological repercussions, it is essential to search for new technologies and tools for agricultural production. Microorganism-based biostimulants are recognized as sustainable alternatives to traditional agrochemicals to enhance and protect agricultural production. Marine actinobacteria are a well-known source of novel compounds for biotechnological uses. In addition, former studies have suggested that coral symbiont actinobacteria may support co-symbiotic photosynthetic growth and tolerance and increase the probability of corals surviving abiotic stress. We have previously shown that this activity may also hold in terrestrial plants, at least for the actinobacteria Salinispora arenicola during induced heterologous symbiosis with a wild Solanaceae plant Nicotiana attenuata under in vitro conditions. Here, we further explore the heterologous symbiotic association, germination, growth promotion, and stress relieving activity of S. arenicola in tomato plants under agricultural conditions and dig into the possible associated mechanisms. Tomato plants were grown under normal and saline conditions, and germination, bacteria-root system interactions, plant growth, photosynthetic performance, and the expression of salt stress response genes were analyzed. We found an endophytic interaction between S. arenicola and tomato plants, which promotes germination and shoot and root growth under saline or non-saline conditions. Accordingly, photosynthetic and respective photoprotective performance was enhanced in line with the induced increase in photosynthetic pigments. This was further supported by the overexpression of thermal energy dissipation, which fine-tunes energy use efficiency and may prevent the formation of reactive oxygen species in the chloroplast. Furthermore, gene expression analyses suggested that a selective transport channel gene, SlHKT1,2, induced by S. arenicola may assist in relieving salt stress in tomato plants. The fine regulation of photosynthetic and photoprotective responses, as well as the inhibition of the formation of ROS molecules, seems to be related to the induced down-regulation of other salt stress response genes, such as SlDR1A-related genes or SlAOX1b. Our results demonstrate that the marine microbial symbiont S. arenicola establishes heterologous symbiosis in crop plants, promotes growth, and confers saline stress tolerance. Thus, these results open opportunities to further explore the vast array of marine microbes to enhance crop tolerance and food production under the current climate change scenario.

show abstract

Salinity acclimation ameliorates salt stress in tomato (Solanum lycopersicum L.) seedlings by triggering a cascade of physiological processes in the leaves

Cited by 26 publications

References 50 publications

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

Monitoring of Salinity, Temperature, and Drought Stress in Grafted Watermelon Seedlings Using Chlorophyll Fluorescence

Effect of Three Nanoparticles (Se, Si and Cu) on the Bioactive Compounds of Bell Pepper Fruits under Saline Stress

Habitat-adapted heterologous symbiont Salinispora arenicola promotes growth and alleviates salt stress in tomato crop plants

Contact Info

Product

Resources

About