Differential Solute Regulation in Leaf Blades of Various Ages in Salt-Sensitive Wheat and a Salt-Tolerant Wheat x Lophopyrum elongatum (Host) A. Love Amphiploid

Colmer, Timothy D.; Epstein, Emanuel; Dvořák, Jan

doi:10.1104/pp.108.4.1715

Cited by 133 publications

(80 citation statements)

References 33 publications

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“…High levels of Ca 2+ in rice root environment are essential for the maintenance of high root uptake and shoot accumulation of Ca 2+ and K + in saline soils and thus for avoiding salinity damage in plants as shown in rice plants (Song et al 2006). Earlier studies report on cartbohydrate accumulation during various abiotic stresses in plants where long term carbohydrate storage occurs during reproductive development (Colmer et al 1995).…”

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confidence: 99%

The effect of salinity stress on ions and soluble sugars distribution in leaves, leaf sheaths and roots of rice (Oryza sativa L.) seedlings

Nemati¹,

Moradi²,

Gholizadeh³

et al. 2011

Plant Soil Environ.

123

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In order to investigate the solutes accumulation associated with salt tolerance of rice (Oryza sativa L.), two rice genotypes including IR651 (salt-tolerant) and IR29 (salt-sensitive) were grown hydroponically in the Youshida nutrient solution. Salinity treatment was imposed 3 weeks after sowing using NaCl in two levels 0 and 100 mmol. Samples were separately collected from the youngest (sixth) leaves, leaf sheaths and roots at 72 and 240 h after salinization; then Na + , K + , Ca 2+ , Mg 2+ , P, Mn 2+ , Cl -and total soluble sugars concentration and Na + /K + ratio were determined. Total dry weight of both genotypes decreased with the application of NaCl. Salinity caused higher accumulation of Na + and Cl -in the sixth leaf and leaf sheath of IR29 than in IR651 while their concentration in root of IR651 was higher. K + concentration was decreased in the sixth leaf and leaf sheath of IR29 under NaCl stress. Reduction in Ca 2+ and Mg 2+ concentrations were observed in sixth leaves of both genotypes. P concentration was increased in leaf sheath and root of IR29 under saline conditions while it showed no changes in IR651. Our results indicated that the tolerant genotype had mechanisms to prevent high Na + and Cl -accumulation in the sixth leaf. High total soluble sugars concentration in shoot of IR651 is probably for adjusting osmotic potential and better water uptake under salinity. These mechanisms help plant to avoid tissue death and enable to continue its growth and development under saline conditions.

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confidence: 99%

The effect of salinity stress on ions and soluble sugars distribution in leaves, leaf sheaths and roots of rice (Oryza sativa L.) seedlings

Nemati¹,

Moradi²,

Gholizadeh³

et al. 2011

Plant Soil Environ.

123

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“…Na + concentration had negative and significant correlation with chl a+b (r = -0.48*) and grain yield (r = -0.45*) and positive correlation with grain yield loss (r =0.48*) under salinity stress conditions. It is evident that salt tolerance is associated with low uptake of Na + (Schachtman and Munns, 1992;Santa-Maria and Epstein, 2001), partial exclution (Colmer et al, 1995), its removal from the cytoplasm and compartmentalization into the vacuoles (Ashraf, 1994). Schachtman and Munns (1992) described the association of low shoot Na + concentration with salt tolerance in wheat.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of triticale genotypes for salt tolerance using physiological traits

Salehi

Arzani

2014

Emir. J. Food Agric

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Salinity is one of the major constraints to plant production worldwide. The effect of terminal salinity on the physiological traits of 18 triticale (X. triticosecale) lines comprising nine doubled haploid (DH) and nine corresponding advanced lines (F 8 ) and two bread wheat cultivars (control) was investigated under field conditions. Salt-stressed experiment was irrigated using saline water with EC = 16 ds m-1 from mid-jointing growth stage (Zadoks 43) onward. Na + concentration, K + /Na + ratio, Ca 2 + /Na + ratio, chlorophyll content, carotenoids content, proline content and grain yield were assessed. A high correlation coefficient (r=0.84**) was obtained between K + /Na + ratio and grain yield under saline field conditions. The results also revealed an inverse and significant relationship between grain yield loss due to salinity with K + /Na + ratio, proline and carotenoids content under saline stress provided evidence supporting the role of K + /Na + ratio in salinity tolerance. F 8 line number 6 possessed the highest values for carotenoids content, Ca 2 + /Na + ratio and proline content as well as the least Na + concentration under salt-stressed conditions, accompanied by having the least grain yield loss due to salinity, was ranked this line as superior salt-tolerant genotype.

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“…The BADH of Glybet in these species depended on salt inducers 26,29 , salt concentrations 25,32 , exposure time to salt stress 14 as well as genotypic variations. [28][29][30][31][32][33] Normally, the higher of salt concentrations and longer exposure times to salt-stress led to a greater accumulation of Glybet in these plants. Similar observations have been made for BADH enzyme abundance and/or activity in response to salt stress.…”

Section: Resultsmentioning

confidence: 99%

“…Atriplex [25][26] , Suaeda fruticosa, Haloxylon recurvum and Halopyrum macronatum 27 ), crop species (e.g. sorghum 28 , barley 29 , maize 30 and wheat 31 ) and grass species (e.g. Bouteloua cutipendula, Buchloe dactyloides, Cynodon dactylon, Distichlis spicata, Sporobolus airoides, S. cryptandrus and Zoysia japonica 32 ).…”

Section: Resultsmentioning

confidence: 99%

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Cha–um¹,

Kirdmanee²,

Supaibulwatana³

2004

ScienceAsia

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ABSTRACT:The aim of this research was to investigate glycinebetaine (Glybet) accumulation in rice seedlings via the activity of betaine aldehyde dehydrogenase (BADH) and to characterize the physiological responses of Glybet-accumulated seedlings to salt stress. The BADH activity of Thai jasmine rice seedlings cultured photoautotrophically showed a progressive elevation during the first four days after growth under salt-stress condition (342 mM NaCl), but gradually decreased thereafter (days 6-8). This increase in BADH activity was accompanied by an accumulation of Glybet. In contrast, the BADH activity and Glybet content of control seedlings (0 mM NaCl) remained at a low and constant level during the same 8-day interval. Significant reductions in the concentrations of chlorophyll a, chlorophyll b, total chlorophyll and total carotenoid of salt-stressed seedling were observed with increasing exposure time to salt-stressed conditions. The decrease in total chlorophyll concentrations of salt-stressed seedlings was positively related to reductions in the net photosynthetic rate (r = 0.89), and dry weight (r = 0.89). The dry weight of in-vitro salt-stressed seedling was positively related to their survival percentage (r = 0.94). The survival percentage of salt-stressed seedlings was significantly decreased with increasing exposure time to the salt-stressed conditions. The Glybet accumulation in salt-stressed rice seedlings is consistent with a defense response to salt-stressed conditions. These results suggest that assaying BADH activity and/or Glybet accumulation may be further used in screening for salt-tolerant varieties of indica rice.

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Differential Solute Regulation in Leaf Blades of Various Ages in Salt-Sensitive Wheat and a Salt-Tolerant Wheat x Lophopyrum elongatum (Host) A. Love Amphiploid

Cited by 133 publications

References 33 publications

The effect of salinity stress on ions and soluble sugars distribution in leaves, leaf sheaths and roots of rice (Oryza sativa L.) seedlings

The effect of salinity stress on ions and soluble sugars distribution in leaves, leaf sheaths and roots of rice (Oryza sativa L.) seedlings

Evaluation of triticale genotypes for salt tolerance using physiological traits

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