Role of flavonoids and proline in the protection of photosynthetic apparatus in Paulownia under salt stress

Stefanov, Martin; Yotsova, Ekaterina; Gesheva, E.; Dimitrova, Velmira; Markovska, Yuliana; Doncheva, Snejana; Аpostolova, Emilia

doi:10.1016/j.sajb.2021.02.008

Cited by 24 publications

(23 citation statements)

References 50 publications

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“…The photochemical quenching (qP), indicating the proportion of opened PSII reaction centers, significantly decreased in both varieties of sorghum after treatment with 150 mM NaCl, and in Albanus the effect was stronger than in Shamal (Figure 5). Having in mind our previous study [76], which showed that high salt concentrations restrict the electron flow between Q A -and the plastoquinone pool, by influencing Q A reoxidation by PQ and by the recombination of electrons in…”

Section: Discussionmentioning

confidence: 96%

Protective Effects of Sodium Nitroprusside on Photosynthetic Performance of Sorghum bicolor L. under Salt Stress

Stefanov

Rashkov

Yotsova

et al. 2023

Plants

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In this study, the impacts of the foliar application of different sodium nitroprusside (SNP, as a donor of nitric oxide) concentrations (0–300 µM) on two sorghum varieties (Sorghum bicolor L. Albanus and Sorghum bicolor L. Shamal) under salt stress (150 mM NaCl) were investigated. The data revealed that salinity leads to an increase in oxidative stress markers and damage of the membrane integrity, accompanied by a decrease in the chlorophyll content, the open photosystem II (PSII) centers, and the performance indexes (PI ABS and PI total), as well as having an influence on the electron flux reducing photosystem I (PSI) end acceptors (REo/RC). Spraying with SNP alleviated the NaCl toxicity on the photosynthetic functions; the protection was concentration-dependent, and greater in Shamal than in Albanus, i.e., variety specific. Furthermore, the experimental results revealed that the degree of SNP protection under salt stress also depends on the endogenous nitric oxide (NO) amount in leaves, the number of active reaction centers per PSII antenna chlorophylls, the enhanced electron flux reducing end acceptors at the acceptor side of PSI, as well as the stimulation of the cyclic electron transport around PSI. The results showed better protection in both varieties of sorghum for SNP concentrations up to 150 µM, which corresponds to about a 50% increase in the endogenous NO leaf content in comparison to the control plants. Our study provides valuable insight into the molecular mechanisms underlying SNP-induced salt tolerance in sorghum varieties and might be a practical approach to correcting salt intolerance.

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Section: Discussionmentioning

confidence: 96%

Protective Effects of Sodium Nitroprusside on Photosynthetic Performance of Sorghum bicolor L. under Salt Stress

Stefanov

Rashkov

Yotsova

et al. 2023

Plants

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“…The NaCl-induced inactivation of the PSII and PSI centers was proposed in the hypothetical model for the effect of salt on cyanobacterial cells [ 3 , 11 ]. Inhibition of the activity of both photosystems was also detected after salt treatment of Paulownia elongate x elongate and Paulownia tomentosa x fortune [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

Response of Pea Plants (Pisum sativum cv. Ran 1) to NaCl Treatment in Regard to Membrane Stability and Photosynthetic Activity

Popova

Borisova

Vasil’ev

2023

Plants

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Salinity is one of the most extreme abiotic stress factors that negatively affect the development and productivity of plants. The salt-induced injuries depend on the salt tolerance of the plant species, salt concentration, time of exposure and developmental stage. Here, we report on the response of pea plants (Pisum sativum L. cv Ran 1) to exposure to increasing salt concentrations (100, 150 and 200 mM NaCl) for a short time period (5 days) and the ability of the plants to recover after the removal of salt. The water content, membrane integrity, lipid peroxidation, pigment content and net photosynthetic rate were determined for the pea leaves of the control, treated and recovered plants. Salt-induced alterations in the primary photosynthetic reactions and energy transfer between the main pigment–protein complexes in isolated thylakoid membranes were evaluated. The pea plants were able to recover from the treatment with 100 mM NaCl, while at higher concentrations, concentration-dependent water loss, the disturbance of the membrane integrity, lipid peroxidation and an increase in the pigment content were detected. The net photosynthetic rate, electron transport through the reaction centers of PSII and PSII, activity of PSIIα centers and energy transfer between the pigment–protein complexes were negatively affected and were not restored after the removal of NaCl.

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“…Furthermore, one of the most highlighted functions of flavonoids is plant protection against abiotic stresses like drought, salinity, UV radiation and heat and biotic stresses including insects and pathogen attacks (69)(70)(71). For instance, the importance of flavonoids and proline during salt stress for the prevention of photosynthetic apparatus activities and plant adaptability to various high salt levels is recognized (72). Through control of transcriptional and hormonal pathways, increased flavonoid accumulation in the nagdong rice cultivar can decreases combined salt and heat stress (73).…”

Section: Discussionmentioning

confidence: 99%

Effect of some Pseudomonas strains and Agave americana L. on wheat germination under salt stress

Mokrani

Nabti

2022

Plant Sci. Today

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Currently, several efforts focus remedying the problem of agricultural soil salinity using eco-friendly strategies. This study aimed particularly the study of Triticum durum (durum wheat) seeds germination in the presence of Pseudomonas strains and hydro-alcoholic extract of Agave americana L. under saline stress conditions. The preliminary phytochemical screening of A. americana, phylogenetic identification and production of indole-3-acetic acid (IAA) by Pseudomonas strains, in vitro impact of hydro-alcoholic extract and Pseudomonas strains combination on salt stress resistance, preliminary effects of A. americana on Triticum durum germination and phytopathogenic fungi inhibition under salt stress were carried out using corresponding protocols. In in vitro trials, phytochemical screening revealed the richness of A. americana in polyphenols (1014.062±161.017 mM GA equivalent/g FW) and flavonoids (51.065±27.391 mg quercetin equivalent/g FW). The ability of Pseudomonas strains to produce the phytohormone indole-3-acetic acid (IAA) varied from 116.67±8.25 µg/ml to 857.14±80.50 µg/ml. The leaf extract of A. americana is an effective osmoprotectant that improves the resistance of the strain P1 Pseudomonas plecoglissicida to saline stress. In in vivo experiments, the extract of A. americana did not show any effect on the germination of wheat seeds. However, it effectively inhibited the contamination of seeds by phytopathogenic fungi during germination and saline conditions. Findings of the study revealed that Pseudomonas plecoglissicida and A. americana extract are very promising for the inhibition of phytopathogenic fungi and the alleviation of salt stress.

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Role of flavonoids and proline in the protection of photosynthetic apparatus in Paulownia under salt stress

Cited by 24 publications

References 50 publications

Protective Effects of Sodium Nitroprusside on Photosynthetic Performance of Sorghum bicolor L. under Salt Stress

Protective Effects of Sodium Nitroprusside on Photosynthetic Performance of Sorghum bicolor L. under Salt Stress

Response of Pea Plants (Pisum sativum cv. Ran 1) to NaCl Treatment in Regard to Membrane Stability and Photosynthetic Activity

Effect of some Pseudomonas strains and Agave americana L. on wheat germination under salt stress

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