The development of technique of decrease in nitrate accumulation in vegetables by controlling environmental conditions and nitrate reduction in leaf

通过控制环境条件和叶内硝酸盐还原来减少蔬菜中硝酸盐积累的技术的开发

基本信息

批准号：
17580026
负责人：
NADA Kazuyoshi
金额：
$ 2.46万
依托单位：
Mie University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

The purpose of this study is to establish a technique that would decrease the nitrate concentration in vegetables, especially spinach by using continuous lighting method treated just before harvest (CLM). CLM for 24 hr simultaneously caused a significant decrease in nitrate and increases in ascorbic acid and carotene contents in spinach leaf On the other hands, oxalate which is harmful component content in leaf slightly decreased by CLM Then CLM did not affect an oxalate metabolism in spinach leaf. Therefore, we examined the effects of the combination treatment of CML and carbon dioxide enrichment (CDE) to decrease in nitrate and oxalate simultaneously. Photosynthetic rate of spinach leaf in CLM+CDE condition was 1.6 times higher than in only CLM condition. While, photorespiration rate was almost zero in CLM+CDE condition. This suggests that oxalate metabolism may be seriously inhibited in CLM+CDE condition Nitrate content in spinach leaf decreased by both CLM and CLM+CDE conditions, but the decrease was more pronounced in CLM+CDE than in CLM. CLM treatment did not affect oxalate content in spinach leaf. However, CLM+CDE treatment caused a significant decrease in oxalate content in leaf. The result indicate that combination treatments of continuous lighting and carbon dioxide enrichment treated just before harvest induce simultaneously decrease in harmful components in spinach such as nitrate and oxalate.

这项研究的目的是建立一种可以降低蔬菜中硝酸盐浓度的技术，尤其是通过使用收获前处理的连续照明方法（CLM）。 CLM同时导致硝酸盐显着降低，另一只手的菠菜叶中的抗坏血酸和胡萝卜素含量增加，草酸盐含量是叶片中有害成分的含量，而Clm略微降低了CLM，那么CLM不会影响菠菜叶中草酸盐代谢。因此，我们检查了CML和二氧化碳富集（CDE）的组合处理对同时减少硝酸盐和草酸盐的影响。 CLM+CDE条件下菠菜叶的光合速率比仅在CLM条件下高1.6倍。而在CLM+CDE条件下，光呼吸率几乎为零。这表明，在CLM和CLM+CDE条件下，菠菜叶中的CLM+CDE条件硝酸盐含量可能会严重抑制草酸盐代谢，但在CLM+CDE中的降低比CLM中的降低更为明显。 CLM治疗不会影响菠菜叶中的草酸盐含量。但是，CLM+CDE处理导致叶片中草酸盐含量显着降低。结果表明，在收获之前处理的连续照明和二氧化碳富集的组合处理诱导菠菜中有害成分（例如硝酸盐和草酸盐）的有害成分。