...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Scientia horticulturae >Growth and nutritional quality improvement in two differently pigmented lettuce cultivars grown under elevated CO2 and/or salinity
【24h】

Growth and nutritional quality improvement in two differently pigmented lettuce cultivars grown under elevated CO2 and/or salinity

机译：在二氧化碳和/或盐度升高的情况下生长的两种色素不同的生菜品种的生长和营养品质改善

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The interest of improving yield and quality of vegetables has increased in the recent years due to their benefits on human health. The aim of this study was to investigate if salt stress and elevated CO2 applied alone or in combination can improve the growth and nutritional quality of two differently pigmented (green and red) Lactuca sativa (L.) cultivars. Seedlings grown under ambient (400 +/- 20 mu mol mol(-1)) or elevated (700 +/- 20 mu mol mol(-1)) CO2 concentration for 35 days were subsequently supplied with 0 or 200 mM NaCl for 4 days. Then, biomass production, antioxidant capacity and minerals, nitrates, carbohydrates, proteins and hydrophilic and lipophilic antioxidant concentrations were measured. Red-pigmented lettuce showed higher nutritional quality than green-pigmented lettuce due to higher concentrations of Ca, P, Zn, and higher concentrations of lipophilic (Chl-a, Chl-b, and carotenoids) and hydrophilic (reduced ascorbate, total phenolics, and anthocyanins) antioxidants. Under elevated CO2, both lettuce cultivars increased the uptake of almost all minerals to adjust to the higher growth rates, reaching similar concentrations to the ones detected under ambient CO2; only Mg and Fe were reduced. Furthermore, the antioxidant capacity, Chl-b and glutathione concentration increased in both cultivars. Under salt stress, the N and K concentrations decreased in both cultivars, while Ca, Mg, and P concentrations were also reduced in the red cultivar, probably due to a blockage in the uptake of these nutrients. Both lipophilic and hydrophilic antioxidant compounds increased in order to defend against the oxidative stress caused by an imbalance in ATP and NADPH production and consumption. The magnitude of the response was dependent on the cultivar. When salt stress was imposed under elevated CO2, each cultivar responded differently. The red cultivar seemed to gain a greater advantage from elevated CO2 than the green cultivar because it better adjusted both mineral uptake and antioxidant metabolism. We conclude that elevated CO2 alone or in combination with short environmental salt stress permits us to increase the nutritional quality (increasing the concentration of some minerals and antioxidants) of lettuce without yield losses or even increasing production; however, the choice of the best growing conditions is dependent on the attributes we wish to improve. (C) 2015 Elsevier B.V. All rights reserved.
机译：由于蔬菜对人类健康的益处，近年来提高蔬菜产量和质量的兴趣不断增加。这项研究的目的是研究盐胁迫和升高的CO2单独或组合使用是否可以改善两种不同色素（绿色和红色）紫花苜蓿（L.）的生长和营养品质。随后向幼苗提供在环境（400 +/- 20μmol mol（-1））或升高（700 +/- 20μmol mol（-1））的CO2浓度下生长35天的幼苗，用0或200 mM NaCl处理4天。然后，测量了生物质的产生，抗氧化能力和矿物质，硝酸盐，碳水化合物，蛋白质以及亲水和亲脂性抗氧化剂的浓度。由于高浓度的Ca，P，Zn和高浓度的亲脂性（Chl-a，Chl-b和类胡萝卜素）和亲水性（抗坏血酸含量降低，总酚含量降低），红色色素生菜显示出比绿色色素生菜更高的营养品质。和花青素）抗氧化剂。在二氧化碳升高的情况下，两个莴苣品种都增加了对几乎所有矿物质的吸收，以适应更高的生长速率，达到与在环境二氧化碳下检测到的浓度相似的浓度。仅还原了镁和铁。此外，两个品种的抗氧化能力，Chl-b和谷胱甘肽浓度均增加。在盐胁迫下，两个品种的氮和钾含量均下降，而红色品种的钙，镁和磷含量也降低，这可能是由于这些营养素的吸收受阻。亲脂性和亲水性抗氧化剂化合物均增加，以抵抗由ATP和NADPH生产和消费不平衡引起的氧化应激。反应的强度取决于品种。在较高的CO2胁迫下施加盐胁迫时，每个品种的反应都不同。红色品种似乎比绿色品种从提高的CO2中获得了更大的优势，因为它可以更好地调节矿物质的吸收和抗氧化剂的代谢。我们得出的结论是，单独增加CO2或与短时环境盐胁迫相结合，可以使我们提高生菜的营养质量（提高某些矿物质和抗氧化剂的浓度），而不会造成产量损失甚至增加产量。但是，最佳生长条件的选择取决于我们希望改善的属性。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号