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首页> 外文期刊>International Journal of Biosciences >NaCl stress-induced growth, water and ions contents changes on in vitro selection of salt tolerant and salt sensitive callus of wheat (Triticum durum Desf.)
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NaCl stress-induced growth, water and ions contents changes on in vitro selection of salt tolerant and salt sensitive callus of wheat (Triticum durum Desf.)

机译：NaCl胁迫诱导的小麦的耐盐和耐盐愈伤组织的体外选择（Triticum durum Desf。）会导致生长，水分和离子含量变化

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Callus cultures tolerant to NaCl were developed from eight wheat genotypes using in vitro selection techniques. The accumulation of inorganic (Na+, Cl-and K+) solutes, water content and relative fresh weight were determined in selected (tolerant and sensitive) calli after a NaCl shock in order to evaluate their implication in salt tolerance of the selected lines. No growth reduction was observed in salt-tolerant calli compared to control while a significant (P<0.05) decrease about 46.54% was observed in salt sensitive ones when both were cultivated under NaCl stress. Water content is significantly (P<0.05) high in salt-sensitive calli than salt-tolerant ones. Selected calli accumulate less K+as compared with control. However, K+content of salt-tolerant calli is greater than that of salt-sensitive. Accumulation of Na+and Cl-were more important in salt-sensitive calli in comparison with salt-tolerant ones while K+content was lower in salt-sensitive than in salt-tolerant calli when both were exposed to salt. The results indicated Na+and Cl-exclusion combined to less K+accumulation may play a key role in in vitro salt-tolerance in wheat calli lines obtained by in vitro selection and they could contribute mainly to counteract the negative effects of salt stress in wheat tolerant calli. Comparison of K+/Na+ ratio permitted to classify Sebou, Anouar and Tarek which are as most salt-tolerant wheat genotypes and on contrary, Marzak, Ourgh, Massa and Amjad as salt-sensitive wheat genotypes. K+/Na+ ratio can be use as a criterion of wheat genotypes classification
机译：使用体外选择技术，从八种小麦基因型中开发了耐NaCl的愈伤组织培养物。在NaCl冲击后，在选定的（耐性和敏感性）愈伤组织中测定了无机（Na +，Cl-和K +）溶质的积累，水含量和相对新鲜重量，以评估其对选定品系的耐盐性的影响。与对照相比，在耐盐愈伤组织中未观察到生长减少，而在盐敏感的愈伤组织中均在NaCl胁迫下培养时，观察到显着（P <0.05）下降约46.54％。耐盐愈伤组织中的水分含量比耐盐愈伤组织中的水含量显着高（P <0.05）。与对照相比，所选愈伤组织累积的K +少。然而，耐盐愈伤组织的K +含量大于盐敏感性愈伤组织的K +含量。与耐盐的愈伤组织相比，Na +和Cl-的积累在耐盐愈伤组织中更为重要，而当两者都暴露于盐下时，耐盐愈伤组织中的K +含量要比耐盐愈伤组织低。结果表明，Na +和Cl-排阻相结合减少K +积累可能在通过体外选择获得的小麦愈伤组织中的体外耐盐性中起关键作用，并且它们可能主要用于抵消小麦盐胁迫的负面影响宽容的愈伤组织。比较K + / Na +比率可以将Sebou，Anouar和Tarek归类为最耐盐的小麦基因型，而将Marzak，Ourgh，Massa和Amjad归为对盐敏感的小麦基因型。 K + / Na +比值可作为小麦基因型分类的标准

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