Alleviation of adverse effects of salt stress on growth of maize (Zea mays L.) by sulfur supplementation

Riffat, Alia; Ahmad, Muhammad Sajid Aqeel

doi:10.30848/pjb2020-3(38)

Cited by 20 publications

(11 citation statements)

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“…Abiotic stresses may also affect starch accumulation and degradation, as it may be remobilised to release energy, sugars, carbon and derived metabolites when photosynthesis is limited [ 55 ]. In general terms, under salt stress conditions a decrease of the starch content has been described, although an improved accumulation has been observed in tolerant plants [ 56 ], as we have noticed in this experiment in A25. However, a better starch degradation into soluble sugars has been also linked with tolerance to stress, since they may interact with hormones, genes and proteins, regulating diverse pathways as well as growth and development [ 57 ].…”

Section: Discussionsupporting

confidence: 60%

Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach

et al. 2021

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Background Pepper is one of the most cultivated crops worldwide, but is sensitive to salinity. This sensitivity is dependent on varieties and our knowledge about how they can face such stress is limited, mainly according to a molecular point of view. This is the main reason why we decided to develop this transcriptomic analysis. Tolerant and sensitive accessions, respectively called A25 and A6, were grown for 14 days under control conditions and irrigated with 70 mM of NaCl. Biomass, different physiological parameters and differentially expressed genes were analysed to give response to differential salinity mechanisms between both accessions. Results The genetic changes found between the accessions under both control and stress conditions could explain the physiological behaviour in A25 by the decrease of osmotic potential that could be due mainly to an increase in potassium and proline accumulation, improved growth (e.g. expansins), more efficient starch accumulation (e.g. BAM1), ion homeostasis (e.g. CBL9, HAI3, BASS1), photosynthetic protection (e.g. FIB1A, TIL, JAR1) and antioxidant activity (e.g. PSDS3, SnRK2.10). In addition, misregulation of ABA signalling (e.g. HAB1, ERD4, HAI3) and other stress signalling genes (e.g. JAR1) would appear crucial to explain the different sensitivity to NaCl in both accessions. Conclusions After analysing the physiological behaviour and transcriptomic results, we have concluded that A25 accession utilizes different strategies to cope better salt stress, being ABA-signalling a pivotal point of regulation. However, other strategies, such as the decrease in osmotic potential to preserve water status in leaves seem to be important to explain the defence response to salinity in pepper A25 plants.

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Section: Discussionsupporting

confidence: 60%

Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach

et al. 2021

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“…The exogenous application of substances or signaling molecules can regulate the plant’s metabolism for stress tolerance. Studies have shown that sulfur (S) and ethylene regulate salt tolerance in plants [ 11 , 12 ] by regulating various cellular processes. Sulfur is a major constituent of many enzymes of the photosynthetic carbon reduction cycle, and S supplementation increases photosynthesis via modulating the photosynthesis machinery and activating the synthesis of antioxidants [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Ethylene and Sulfur Coordinately Modulate the Antioxidant System and ABA Accumulation in Mustard Plants under Salt Stress

Fatma

Iqbal

Gautam

et al. 2021

Plants

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This study explored the interactive effect of ethephon (2-chloroethyl phosphonic acid; an ethylene source) and sulfur (S) in regulating the antioxidant system and ABA content and in maintaining stomatal responses, chloroplast structure, and photosynthetic performance of mustard plants (Brassica juncea L. Czern.) grown under 100 mM NaCl stress. The treatment of ethephon (200 µL L−1) and S (200 mg S kg−1 soil) together markedly improved the activity of enzymatic and non-enzymatic components of the ascorbate-glutathione (AsA-GSH) cycle, resulting in declined oxidative stress through lesser content of sodium (Na+) ion and hydrogen peroxide (H2O2) in salt-stressed plants. These changes promoted the development of chloroplast thylakoids and photosynthetic performance under salt stress. Ethephon + S also reduced abscisic acid (ABA) accumulation in guard cell, leading to maximal stomatal conductance under salt stress. The inhibition of ethylene action by norbornadiene (NBD) in salt- plus non-stressed treated plants increased ABA and H2O2 contents, and reduced stomatal opening, suggesting the involvement of ethephon and S in regulating stomatal conductance. These findings suggest that ethephon and S modulate antioxidant system and ABA accumulation in guard cells, controlling stomatal conductance, and the structure and efficiency of the photosynthetic apparatus in plants under salt stress.

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“…Cha-Um et al (2011) reported a significant positive effect of G and FM on SPAD, A, g s and E of rice plant grown in saltaffected soil. The reaction of SA with soil lime, increase both soluble Ca 2+ and SO 4 2- (Mace et al 1999) that play the key role in nullifying salt stress and improving physiological and growth characteristics in various plants (Helmy et al 2013;Akladious and Mohamed 2018;Hussain et al 2019;Riffat et al 2020). The alleviation in rice SPAD, A, g s and E also attributed to improved nutrients uptake, which plays a considerable role in the photosynthetic process, stomatal movement, osmoregulation and enzyme activation (Hasanuzzaman et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Effect of Chemical Reclamation on the Physiological and Chemical Response of Rice Grown in Varying Salinity and Sodicity Conditions

Qadir¹

2021

IJAB

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Salinity and sodicity are the major abiotic constraints that prevail in arid and semi-arid regions. Proper management is required for productive use of this land. Reclamation of sodic and saline-sodic soils is highly site-specific that describes the diverse response of different soils to different amendments. These reclamation practices also alter the plant's physiological and ionic characteristics. This experiment aimed to better understand the physiological and ionic responses of rice crop at different salinity/sodicity levels. A lysimeter experiment was set forth with soil having ECe (dS m-1):SAR (mmol L-1)1/2 levels as 4:20, 8:40, 12:60 and 16:80 and all the levels were treated with organic (farm manure at 25 Mg ha-1) and inorganic (gypsum at 100% soil gypsum requirement (SGR) and sulphuric acid equivalent to 100% SGR) amendments keeping no ammendment as control. Results revealed that the maximum relative increase in physiological attributes (photosynthetic rate, transpiration rate, stomatal conductance and total chlorophyll contents), ionic contents (nitrogen, potassium and K:Na ratio) and growth of rice were recorded with sulphuric acid application followed by gypsum. On an average 25%, 31% and 45% increase in biological yield, plant height and paddy yield, respectively was observed with sulphuric acid application over control. It is concluded that sulphuric acid and gypsum both were the best amendments for reclamation of soil having a low level of salinity/sodicity whereas, at higher salinity/sodicity levels, only sulphuric acid seemed better for improved rice production. © 2021 Friends Science Publishers

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Alleviation of adverse effects of salt stress on growth of maize (Zea mays L.) by sulfur supplementation

Cited by 20 publications

References 0 publications

Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach

Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach

Ethylene and Sulfur Coordinately Modulate the Antioxidant System and ABA Accumulation in Mustard Plants under Salt Stress

Effect of Chemical Reclamation on the Physiological and Chemical Response of Rice Grown in Varying Salinity and Sodicity Conditions

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