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首页> 外文期刊>Plant Physiology and Biochemistry >Genotypic differences in agro-physiological, biochemical and isotopic responses to salinity stress in quinoa (Chenopodium quinoa Willd.) plants: Prospects for salinity tolerance and yield stability
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Genotypic differences in agro-physiological, biochemical and isotopic responses to salinity stress in quinoa (Chenopodium quinoa Willd.) plants: Prospects for salinity tolerance and yield stability

机译：藜氨基藜（Chenopodium Quinoa Willd。）盐度胁迫对农业生理，生化和同位素反应的基因型差异：盐度耐受性和产量稳定性的前景

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摘要

Quinoa is an important nutritive crop that can play a strategic role in the development of marginal and degraded lands. Genotypic variations in carbon isotope composition (delta C-13), carbon isotope discrimination (Delta C-13), ratio of intercellular to atmospheric CO2 concentration (Ci/Ca), intrinsic water use efficiency (iWUE), seed yield and grain protein contents were analyzed in 6 quinoa cultivars grown in the field under saline conditions (0, 10, 20 dS m(-1)). Significant variations occurred in dry biomass, seed yield, plant height, number of branches, number of panicles, panicle weight, harvest index, N and C content. Some genotypes produced yields with values significantly higher than 2.04 t ha(-1) (Q12), with an average increased to 2.58 t ha(-1) (AMES22157). The present study indicates a large variation in Delta C-13 for salinity treatments (3.43 parts per thousand) and small magnitude of variations among genotypes (0.95 parts per thousand). Results showed that A might be used as an important index for screening, and selection of the salt tolerant quinoa genotypes with high iWUE. Quinoa genotypes differs in foliar C-13 and N-15 isotope composition, which reflected complex interactions of salinity and plant carbon and nitrogen metabolisms. Grain protein contents were found higher in Q19 and Q31 and lowest in Q26. The study demonstrates that AMES22157 and Q12, were salt tolerant and high yielder while the AMES22157 was more productive. This study provides a reliable measure of morpho-physiological, biochemical and isotopic responses of quinoa cultivars to salinity in hyper arid UAE climate and it may be valuable in the future breeding programs. The development of genotypes having both higher water use efficiency and yield potential would be a very useful contribution for producers in the dry region of Arabian Peninsula.
机译：奎奴亚藜是一个重要的营养素作物，可以在边际和退化土地的发展中发挥战略作用。碳同位素组合物（Delta C-13），碳同位素辨别（Delta C-13）的基因型变化，细胞与大气二氧化碳浓度（Ci / Ca）的比例，内在用水效率（IWUE），种子产量和谷物蛋白质含量在盐水条件下在田间种植的6种藜麦品种（0,110,20ds m（-1））中分析。干生物质，种​​子产量，植物高度，分支数，圆锥数，穗重量，收获指数，N和C含量的显着变化。一些基因型产生的产率显着高于2.04 t ha（-1）（q12），平均增加至2.58 t ha（-1）（ames22157）。目前的研究表明，对于盐度处理的ΔC-13的大变异（3.43份/份），基因型（每千份0.95份）之间的少量变化。结果表明，A可能被用作筛选的重要指标，以及高IWUE的耐盐性奎奴亚藜基因型。藜麦基因型在叶酸C-13和N-15同位素组合物中不同，其反映了盐度和植物碳和氮代谢的复杂相互作用。在Q19和Q31中发现谷物蛋白质含量较高，在Q26中最低。该研究表明，AMES22157和Q12，耐盐和高yielder，而AMES22157更加成熟。本研究提供了奎奴亚藜品种对高干旱阿联酋气候盐度的麦克洛生物化学和同位素反应的可靠措施，并且在未来的育种计划中可能是有价值的。具有较高水利用效率和产量潜力的基因型的发展将是阿拉伯半岛干地区生产商的一个非常有用的贡献。

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