Photosynthetic Responses of Tomato Leaves
to Salt and Cadmium Stresses: Growth
and Chlorophyll a Fluorescence
Kinetic Analyses

Gharbi, Fatma; Zribi, Lobna; Daly, Alia Ben; Rejeb, Saloua; Hanchi, Belgacem

doi:10.15244/pjoes/81066

Cited by 12 publications

(7 citation statements)

References 46 publications

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“…Under salinity stress, there was no change q N , F V /F M and Φ PSII , indicating that the plants exposed to 85 mM NaCl did not suffer significant damage to their photochemical apparatus. Therefore, under these conditions, the tomato plants did not present symptoms of photochemical or photoinhibition stress probably because NaCl initially decreased stomatal conductance, which reduced photosynthesis, leaving PSII unaffected (Gharbi et al 2018). These results coincide with those reported by Zribi et al (2009) for the same tomato cultivar subjected to salt stress, where it is shown that the fluorescence parameters did not show significant changes during the 3 weeks following the application of salt treatment.…”

Section: Discussionsupporting

confidence: 89%

“…The reduction in these parameters is a common response of plants exposed to salt stress and is intimately associated with stomatal control (Mozafariyan et al 2013). The decrease in g s in plants grown with NaCl could be due to the decrease in Ψ w and the associated increase in Na + in tomato leaves (Zribi et al 2009;Gharbi et al 2018). The importance of stomatal regulation in tomato plants subjected to stress was also observed in the cultivars 'Capello' (Xu et al 1997), Fig.…”

Section: Discussionmentioning

confidence: 77%

“…On the contrary, upon evaluation of 10 different tomato genotypes, it was observed that the Chl a+b content decreases with salinity, the reduction being slightly lower in the genotypes with higher tolerance (Dogan et al 2010). The decreased in chlorophyll content under salinity stress is a commonly reported phenomenon, due to its adverse effects on membrane stability and/or due to impaired biosynthesis or accelerated pigment degradation (Ashraf and Bhatti 2000;Demirkaya 2014;Gharbi et al 2018). On the other hand, Juan et al (2005) reported that chlorophyll content is not a good indicator of salt tolerance in tomato plants, better results being obtained with the determination of carotenoids contents.…”

Section: Discussionmentioning

confidence: 99%

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Effect of salinity and seed salt priming on the physiology of adult plants of Solanum lycopersicum cv. ‘Río Grande’

2020

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NaCl priming of seeds can improve seed germination and seedling growth and increase the tolerance to salinity, but most research on salt tolerance in priming plants is restricted to the germination and seedling stages. The aim of this study was to evaluate the effect of soil water salinity and seed salt priming on the physiological responses of adult Solanum lycopersicum Mill. 'Río Grande' plants. A group of seeds was germinated in freshwater (control), and another group was germinated in an 85 mM NaCl solution (salt priming). Plants from both groups were grown during a period of 8 weeks in hydroponic culture. Subsequently, control and priming plants were divided into two subgroups. One subgroup was kept in freshwater, while 85 mM NaCl was added to the nutrient solution of the second subgroup. Tissue water relations, gas exchange, fluorescence and growth parameters were obtained at 0-15 days after the beginning of the experiment. The addition of NaCl to adult plants led to a reduction of leaf solute potential, photosynthetic maximum carboxylation and transpiration rates, and stomatal conductance but neither the chlorophyll content nor any of the parameters associated with the growth of the plant were negatively affected. Salt seed priming induces physiological changes such as improved osmotic adjustment, maximum quantum yield of photosystem II and, partially, the water use efficiency, characteristics that are considered to improve tolerance to salt stress.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

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Effect of salinity and seed salt priming on the physiology of adult plants of Solanum lycopersicum cv. ‘Río Grande’

2020

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“…Saline stress imposes stomatal limitations on photosynthesis, which are accompanied by a decrease in the consumption rate of ATP and NADPH for CO 2 assimilation, which would result in a reduction in AETR and, consequently, harm the PSII. However, the functioning of the water-water cycle in C3 plants, the increase in photorespiration, under stress conditions, can maintain the AETR similar to those observed in leaves of non-stressed plants, despite the reduction in the CO 2 assimilation rate [62][63][64][65][66]. .…”

Section: Chlorophyll Fluorescence Amentioning

confidence: 88%

Sugar Metabolism and Photosynthesis of Tomatoes Irrigated with Water Treated with Low-Frequency Electromagnetic Resonance Fields in Different Fertigation Doses

et al. 2022

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Management of irrigation and fertilization in greenhouses, if not done correctly, can cause soil salinization. The use of water treated with very low-frequency electromagnetic resonance fields (WVLF) can reduce salinization effects on the photosynthetic and biometric systems. Thus, the purpose of the research to evaluate the metabolism of photosynthesis and the impact of WVLF on the cultivation of tomato crops subjected to different levels of fertigation. For this, the gas exchange parameters were evaluated, as well as chlorophyll a fluorescence, sugar contents, sucrose, chlorophylls, and phaeophytins and fruit production. The gas exchange parameters had greater activity when subjected to irrigation with electromagnetic water, consequently the production of sugar and sucrose increased. Photosynthetic System II showed less salinity effect, being favored by very low-frequency electromagnetic resonance fields. The production increased by 20% for the dose of 2.5 d·Sm−1 of WVLF reducing the effects caused by higher doses. Hence, the induction of water by electromagnetic fields can provide less damage to the photosynthetic system and to the cultivation of the tomato crop when subjected to saline stress and, consequently, favor the production of fruits by this crop under such conditions.

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“…However, it has been discovered that as salinity increases, chlorophyll levels decrease. Salinity stress causes a reduction in chlorophyll concentration, which could be due to its negative effects on membrane integrity, decreased biosynthesis, or rapid pigment degradation [ 115 , 116 ]. It has also been observed that the long-term effects of salt cause the development of chlorophyll-protein-lipid complexes to be disrupted [ 117 ].…”

Section: Discussionmentioning

confidence: 99%

Amelioration of the physio-biochemical responses to salinity stress and computing the primary germination index components in cauliflower on seed priming

Gour¹,

Sharma²,

Lal³

et al. 2023

Heliyon

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Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

Cited by 12 publications

References 46 publications

Effect of salinity and seed salt priming on the physiology of adult plants of Solanum lycopersicum cv. ‘Río Grande’

Effect of salinity and seed salt priming on the physiology of adult plants of Solanum lycopersicum cv. ‘Río Grande’

Sugar Metabolism and Photosynthesis of Tomatoes Irrigated with Water Treated with Low-Frequency Electromagnetic Resonance Fields in Different Fertigation Doses

Amelioration of the physio-biochemical responses to salinity stress and computing the primary germination index components in cauliflower on seed priming

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