Effect of salinity on water relations of wild barley plants differing in salt tolerance

Vysotskaya, L. B.; Hedley, Pete E.; Sharipova, G.V.; Веселов, Д. С.; Kudoyarova, G. R.; Morris, Jennifer; Jones, Hamlyn G.

doi:10.1093/aobpla/plq006

Cited by 65 publications

(43 citation statements)

References 39 publications

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“…Recent research has confirmed that stomatal closure at the beginning of salinity exposure can contribute to a decline in the flow of toxic ions within the transpiration stream [135][136][137]. Decreases in stomatal conductance due to salinity have been found in several different plant species [45,138].…”

Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 90%

“…Previous comparisons of water relations in some barley cultivars with different drought resistance levels showed that lower stomatal conductance and transpiration at the beginning of salt exposure contributed to higher salt tolerance in terms of improved extension growth and less accumulation of toxic ions [137]. Other authors have reported that stomatal responses to different abiotic stress are probably regulated by root signals, as occurs in drying and re-wetting soils [142,143].…”

Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 99%

“…Other authors have reported that stomatal responses to different abiotic stress are probably regulated by root signals, as occurs in drying and re-wetting soils [142,143]. Stomatal closure in salt-stressed plants may be induced by the accumulation of abscisic acid [137,144,145]. However, Tardieu and Simonneau [146] concluded that the maintenance of water relations may be linked to an interaction between both chemical and hydraulic information.…”

Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 99%

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Plant Responses to Salt Stress: Adaptive Mechanisms

Acosta‐Motos¹,

Ortuño²,

Bernal‐Vicente³

et al. 2017

Preprint

375

200

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This review deals with the adaptive mechanisms that plants can implement to cope with the challenge of salt stress. Plants tolerant to NaCl implement a series of adaptations to acclimate to salinity, including morphological, physiological and biochemical changes. These changes include increases in the root/canopy ratio and in the chlorophyll content in addition to changes in the leaf anatomy that ultimately lead to preventing leaf ion toxicity, thus maintaining the water status in order to limit water loss and protect the photosynthesis process. Furthermore, we deal with the effect of salt stress on photosynthesis and chlorophyll fluorescence and some of the mechanisms thought to protect the photosynthetic machinery, including the xanthophyll cycle, photorespiration pathway, and water-water cycle. Finally, we also provide an updated discussion on salt-induced oxidative stress at the subcellular level and its effect on the antioxidant machinery in both salt-tolerant and salt-sensitive plants. The aim is to extend our understanding of how salinity may affect the physiological characteristics of plants.

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Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 90%

Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 99%

Section: Effects Of Salinity On Leaf Water Relations and Gas Exchangementioning

confidence: 99%

See 1 more Smart Citation

Plant Responses to Salt Stress: Adaptive Mechanisms

Acosta‐Motos¹,

Ortuño²,

Bernal‐Vicente³

et al. 2017

Preprint

375

200

View full text Add to dashboard Cite

show abstract

“…Similarly, Fricke et al (2010) reported that water loss in salinized barley plants remained lower than normal conditions due to stomata closure under salt stress. Likewise, Vysotskaya et al (2010) reported that salt treatment (75 mM) inhibited water loss in tolerated barley cultivars more than sensitive cultivars.…”

Section: Growth Rate Water Loss and Root/shoot Ratio Of Triticale Gementioning

confidence: 97%

Comparison of root xylem structure and hydraulic conductivity of triticale (X Triticosecale Wittmack) genotypes under salt stress

Bijanzadeh¹

2017

Aust J Crop Sci

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To compare the root xylem and hydraulic conductivity of triticale genotypes (Sanabad, Juanillo, and ET-84-5) an experiment was carried out at two concentrations of NaCl (0 and 100 mM), hydroponically. When seedlings had a root length of 25-30 mm, they were transferred to a modified half-strength Hoagland nutrient solution in growth chamber. Then, xylem anatomy, root surface area, hydraulic conductivity, growth rate, and water loss in 14 to 18 days old plants were measured. The xylem anatomy was considered on free-hand cross-sections that were made from 5-10 mm root tips. Root surface area was determined by measuring the length and the radius of the main axis of seminal, adventitious and lateral roots of the 18 days old plants. Under salt, the length of seminal and adventitious roots decreased significantly and ranged from 53±4 to 29±5 mm and 11±1 to 9±2 mm, respectively. In all genotypes, salinity more negatively affected the diameter of central and peripheral metaxylem vessels compared to the number of vessels. The stellar cells in all genotypes were less lignified in adventitious roots and the mature xylem vessels of seminal roots of ET-84-5 and Sanabad had the most lignified walls. In all genotypes, the central metaxylem of seminal roots was less lignified compared to the peripheral metaxylem. Under salinity, the casparian bands could be detected more in the seminal roots as U-shape especially in ET-84-5 and Sanabad. The surface area of seminal root differed among the genotypes from 1.67×10 -3 m 2 in Juanillo to 1.04×10 -3 m 2 in Sanabad under salt stress. Juanillo with highest surface area and lowest thickness of lignified cell wall had the highest seminal root hydraulic conductivity (5.32×10 -9 m s -1 MPa -1 ). It could be concluded that at the early growth stages of the triticale genotypes, the root structures of the Juanillo appeared to be more efficient for water uptake via seminal and adventitious roots and this might be attributed to less lignified cell wall of root cell.

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“…Relative water content (RWC) has been widely accepted as a reproducible and meaningful index of plant water status (Smart, 1974). It has been demonstrated that salt stress also affected and decreased RWC (Vysotskaya et al, 2010) but Sohail et al (2009) showed that increasing salt concentrations also led to a significant increase in relative water contents of leaf and root tissues.…”

Section: Introductionmentioning

confidence: 99%

Screening of recombinant inbred lines for salinity tolerance in bread wheat (Triticum aestivum L.)

Azadi¹,

Hervan²,

Mohammadi³

et al. 2011

Afr. J. Biotechnol.

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Screening and increasing of salinity tolerance of crops is an important aim of many plant breeders.Screening a large number of plants for salinity tolerance is not easy, therefore this investigation was performed to evaluate and screen 186 F 8 recombinant inbred lines (RILs) derived from a cross between Superhead#2 (Super Seri) and Roshan wheat varieties for salinity tolerance. All the individuals were evaluated under two treatments including control (10 mM NaCl) and salt stress (150 mM NaCl). Different traits relating to salt tolerance, including dry matter of shoot and root, sodium and potassium concentration, chlorophyll content and relative water content (RWC) were measured. Significant differences were observed among wheat RILs for all the measured traits. Seedling growth was reduced by salinity in all RILs and we observed a significant negative correlation between shoot dry matter and sodium concentration (r = -0.52**), whereas significant positive correlations between shoot dry matter and K + /Na + ratio (r = 0.36**), chlorophyll content (r = 0.20**) and RWC (r = 0.39**) were detected. Based on our results, sodium concentration of leaf, K + /Na + ratio, chlorophyll content and RWC are good indexes for screening bread wheat genotypes for salinity tolerance.

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Effect of salinity on water relations of wild barley plants differing in salt tolerance

Abstract: Root hydraulic conductivity was decreased by salinity in barley plants in parallel with slower transpiration rates and a down-regulation of aquaporin expression in the roots. The effects were larger and faster in a more salinity-tolerant line.

Cited by 65 publications

References 39 publications

Plant Responses to Salt Stress: Adaptive Mechanisms

Plant Responses to Salt Stress: Adaptive Mechanisms

Comparison of root xylem structure and hydraulic conductivity of triticale (X Triticosecale Wittmack) genotypes under salt stress

Screening of recombinant inbred lines for salinity tolerance in bread wheat (Triticum aestivum L.)

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