Salt stress affects mineral nutrition in shoots and roots and chlorophyll <i>a</i> fluorescence of tomato plants grown in hydroponic culture

Loudari, Aicha; Benadis, Chahinez; Naciri, Rachida; Soulaimani, Aziz; Zeroual, Youssef; Gharous, Mohamed El; Kalaji, Hazem M.; Oukarroum, Abdallah

doi:10.1080/17429145.2020.1841842

Cited by 43 publications

(34 citation statements)

References 62 publications

(71 reference statements)

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“…Our research results correspond positively with the results of the study by Loudari et al [75], who also observed a decrease in chlorophyll fluorescence yield, which indicated inhibition at the acceptor sites of photosystem I. It seems that the downregulation of the electron transport between photosystem I and photosystem II under salt stress may have been caused by the imbalanced nutrient uptake.…”

Section: Chlorophyll Fluorescencesupporting

confidence: 92%

The Effect of NaCl Stress on the Response of Lettuce (Lactuca sativa L.)

et al. 2022

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In recent decades, increasing human pressure has caused the gradual deterioration of the physical and chemical properties of water and soil. Salinity is an important factor influencing the quality of water. The aim of this comprehensive research was to determine the effect of increasing concentrations of sodium chloride, which is a salinity inducer, on the yield, photosynthesis efficiency (expressed with chlorophyll fluorescence measurement) and content of selected nutrients in the leaves of hydroponically grown lettuce (Lactuca sativa L.). Experiments were conducted at the following concentrations of NaCl: 0 (control treatment), 10, 20, 40, and 60 mmol L−1. Studies were conducted in two independent seasons: spring and autumn. The plants exposed to NaCl stress modified their chemical composition by lowering the uptake of (for 60 mmol L−1 NaCl in relation to control): N (−11%), K (−35.7%), and Mg (−24.5%), while increasing the sodium content (+2400%). The Na:K ratio was significantly narrowed (from 76:1 to 2.6:1). The increase in the Cl level in the lettuce leaves may also have caused a decrease in the content of nitrates. As a result of disturbed ionic balance, the RWC was significantly reduced (−6.2%). As a result of these changes, the yield of the biomass of the aerial parts decreased (more than two-fold for the highest NaCl concentration in relation to control) whereas the dry matter content increased (+32%). The measurement of fluorescence showed significant changes at the PSII level. Salinity modified the energy flow rate (F0, FM, FV, FV/FM) as well as the specific energy flows through the reaction centre (ABS/RC, TR0/RC, ET0/RC, DI0/RC). The PSII functioning index, calculated on the basis of energy absorption (PIAbs), also changed. The salinity induced with NaCl significantly worsened the physiological reactions of the plants in the PSII, changed the ionic balance, which resulted in a significantly lower yield of the plants. Due to increasing water quality problems, it will be necessary to use, in agriculture on a much larger scale than before, saline water treatment systems (e.g., highly effective nanofiltration and/or reverse osmosis).

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Section: Chlorophyll Fluorescencesupporting

confidence: 92%

The Effect of NaCl Stress on the Response of Lettuce (Lactuca sativa L.)

et al. 2022

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“…The findings of the current study provide further evidence that salt stress-mediated degradation of chlorophyll negatively affects photosynthetic capacity of plants (Nazar et al 2015). The reduction in A may also be associated to damaging effects of salt stress on photosynthesis pathway due to higher sensitivity of photosystem II to increasing levels of salinity (Loudari et al 2020). Salt-mediated stomatal closure lowers the partial pressure of carbon dioxide which results in decreased internal CO 2 availability as well as g s (Lakra et al 2018).…”

Section: Discussionsupporting

confidence: 58%

“…Salt-mediated stomatal closure lowers the partial pressure of carbon dioxide which results in decreased internal CO 2 availability as well as g s (Lakra et al 2018). Exposure to salinity influences the regeneration of Ribulose-1,5bisphosphate (RuBP) and triose phosphates, and alters the Rubisco carboxylase/oxygenase activity to regulate gas exchange under saline conditions (Li et al 2011;Loudari et al 2020). The observed positive effects on gas exchange characteristics may indicate the antioxidant nature of AsA and SA to neutralize toxic oxidants responsible for damaging the cell membrane structures, as reported by Hashmi et al (2012).…”

Section: Discussionmentioning

confidence: 99%

Salicylic Acid– and Ascorbic Acid–Induced Salt Tolerance in Mung bean (Vigna radiata (L.) Wilczek) Accompanied by Oxidative Defense Mechanisms

Nawaz

Ashraf

Khan

et al. 2021

J Soil Sci Plant Nutr

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The present study aimed at investigating the physiochemical role of phytoprotectants, i.e., salicylic acid (SA) and ascorbic acid (AsA), to induce salt tolerance (0, 80 mM NaCl) in two indigenous mung bean varieties, viz. NM-92 (salt tolerant) and NM-28 (salt sensitive). The mung bean varieties were exposed to salinity stress (80 mM NaCl) after 1 week of germination and then exogenously sprayed with different levels of SA and AsA (0, 50, 100, 150 mg L −1 ) on appearance of stress symptoms. The experiment was carried out in a completely randomized design with three replications. Salinity stress significantly reduced the growth attributes and photosynthetic pigments and considerably increased electrolyte leakage (92-94%), lipoxygenase activity (113-152%), malondialdehyde (103-105%), and hydrogen peroxide (44-46%) contents. Treatment of control plants (0 mM NaCl) with SA or ASA did not significantly reduce growth attributes and photosynthetic pigments. However, exogenous SA and AsA (0, 50, 100, 150 mg L −1 ) markedly enhanced salt stress tolerance by reducing electrolyte leakage (26-34%), lipoxygenase activities (45-51%), and malondialdehyde (32-37%) and hydrogen peroxide concentration (17.2-17.5%) due to higher accumulation of stress metabolites and antioxidative enzymes. The highest increase in stress tolerance was recorded by foliar application of (100 mg L −1 SA) in NM-92. We conclude that application of 100 mg L −1 SA is an effective approach to increase salt tolerance in mung bean. Moreover, the cultivation of salt-tolerant cultivars such as NM-92 is recommended to obtain better mung bean yields in salt-affected areas.

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“…Moreover, the inhibitory effect of ion toxicity, such as Na+ and Cl-, on the mineral absorption directly influences photosynthetic performance. Such a direct correlation of nutrient imbalance and a simultaneous decline in PSII function in salt-stressed plants is already reported [53,54]. The reason could be a reduction in membrane permeability leading to an increasing rate of ion leakage (Fig 4), and antagonistic relationship between excess uptake of Na+ and mineral nutrient such as P and K + under severe salinity stress (Fig 13).…”

Section: Plos Onesupporting

confidence: 55%

Does co-inoculation of mycorrhiza and Piriformospora indica fungi enhance the efficiency of chlorophyll fluorescence and essential oil composition in peppermint under irrigation with saline water from the Caspian Sea?

et al. 2021

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Symbiotic associations with endophytic fungi are ecologically important for medicinal and aromatic plants. Endophytic fungi highly affect the quantity and quality of herbal products. In this study, a pot experiment was carried out in the greenhouse to investigate the interactive effects of Piriformospora indica and arbuscular mycorrhizal (AMF) inoculation on the chlorophyll fluorescence, essential oil composition, and antioxidant enzymes of peppermint under saline condition. The results showed that Fo, YNPQ, YNO, and NPQ values were obviously increased under salinity conditions, while essential oil content, chlorophyll a and b, gs, Fm, Fv, ETR, ФPSII and Fv/Fm ratio decreased by increasing salinity. In addition, salt induced the excess Na+ uptake, whereas the opposite trend was observed for P and K+. The synergistic association of P. indica and AMF caused a considerable increase in the antioxidant ability, essential oil content, Fv/Fm ratio, ФPSII, and amount of P and K+ uptake in salt-stressed plants. The main peppermint oil constituents, menthol, menthone, and 1,8-cineole increased considerably in inoculated plants. Besides, the applied endophytic fungi positively enhanced the ability of peppermint to alleviate the negative effect of the salinity stress.

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Salt stress affects mineral nutrition in shoots and roots and chlorophyll a fluorescence of tomato plants grown in hydroponic culture

Cited by 43 publications

References 62 publications

The Effect of NaCl Stress on the Response of Lettuce (Lactuca sativa L.)

The Effect of NaCl Stress on the Response of Lettuce (Lactuca sativa L.)

Salicylic Acid– and Ascorbic Acid–Induced Salt Tolerance in Mung bean (Vigna radiata (L.) Wilczek) Accompanied by Oxidative Defense Mechanisms

Does co-inoculation of mycorrhiza and Piriformospora indica fungi enhance the efficiency of chlorophyll fluorescence and essential oil composition in peppermint under irrigation with saline water from the Caspian Sea?

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