...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Agricultural and Food Chemistry >Ontogenic variations of ascorbic acid and phenethyl isothiocyanate concentrations in watercress (Nasturtium officinale R.Br.) leaves
【24h】

Ontogenic variations of ascorbic acid and phenethyl isothiocyanate concentrations in watercress (Nasturtium officinale R.Br.) leaves

机译：西洋菜（Nasturtium officinale R.Br.）叶片中抗坏血酸和异硫氰酸苯乙酯浓度的本体变化

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

Watercress (Nasturtium officinale R.Br.) is the richest source of glucosinolate nasturtiin, which on hydrolysis produces phenethyl isothiocyante (PEITC). Interest in growing watercress is stimulated since demonstration of the role of PEITC in protection against cancers associated with tobacco specific carcinogens. Twenty-one days old watercress seedlings were transplanted into growth chambers (16-h days/8-h nights of 25/22 degreesC and photosynthetic photon flux (PPF) of approximate to265 mumol m(-2) s(-1)). The study was replicated three times. Leaves were analyzed for PEITC and ascorbic acid concentrations at transplant, and harvested at 10-days intervals until 60 days after transplant. The PEITC and ascorbic acid concentrations were the highest in leaves harvested at 40 days and the lowest at transplant. Leaves harvested at 40 days produced about 150% higher PEITC concentrations compared to the leaves at transplant. Both PEITC and ascorbic acid concentrations of leaves increased linearly with age until 40 days after transplant after which there was no significant increase. Seedlings at transplant had the lowest dry mass and leaf area, while plants harvested at 60 days had the highest dry mass and leaf area.
机译：豆瓣菜（Nasturtium officinale R.Br.）是芥子油苷nasturtiin的最丰富来源，其水解后可生成异硫氰酸苯乙基酯（PEITC）。自从证明PEITC在预防烟草特有致癌物相关的癌症中的作用以来，人们对豆瓣生长的兴趣得到了激发。将二十一天大的豆瓣菜幼苗移植到生长室中（16 / h天/ 8-h晚上为25/22摄氏度，光合光子通量（PPF）约为265 mumol m（-2）s（-1））。该研究重复了三遍。在移植时分析叶片的PEITC和抗坏血酸浓度，并以10天的间隔收获直至移植后60天。在第40天收获的叶片中PEITC和抗坏血酸的浓度最高，而在移植时最低。与移植时的叶片相比，在第40天收获的叶片产生的PEITC浓度高出约150％。叶片的PEITC和抗坏血酸浓度均随年龄线性增加，直到移植后40天，此后没有明显增加。移栽时的幼苗的干重和叶面积最低，而在60天收获的植物的干重和叶面积最高。

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