摘要
以叶用芥菜为材料,研究不同硒酸盐和硫酸盐处理对植株营养品质及抗氧化物质的影响.结果表明,在低硫(0.5mmol·L-1)水平下,5～10μmol·L-1硒增加叶用芥菜地上部干重;而在高硫(2mmol·L-1)水平下,硒对植株地上部干重无影响.无论在低硫和高硫水平下适度增加硒浓度(0～5μmol·L-1)均能提高可溶性糖含量.低硫水平下,增加硒浓度(0～5μmol·L-1)促进可溶性蛋白质和游离氨基酸合成.增加硒浓度显著提高叶用芥菜地上部Se含量,而对S含量没有明显影响;增加硫浓度显著提高植株地上部S含量,而明显减少Se含量.硒处理对叶用芥菜地上部P、K、Ca、Mg、Fe、Mn的含量没有显著影响,而对Cu含量有较明显的影响.增加硫浓度显著降低叶用芥菜地上部Ca、Mg、Cu、Mn含量,而对P、K、Fe含量没有明显影响.适当增加硒(0～5μmol·L-1)和硫浓度,能显著提高叶用芥菜谷胱甘肽(GSH)含量.硒处理对叶用芥菜抗坏血酸(AsA)含量的影响取决于不同的供硫水平.说明不同硒硫浓度对叶用芥菜的品质形成具有重要影响.
Effects of selenium and sulfur treatments and their interaction on the nutritional quality and antioxidant substances of leaf mustard（Brassica juncea）were studied.The results showed that the shoot dry weight was increased by 5 and 10 μmol·L^-1 selenate under 0.5 mmol·L^-1 sulfur supply,however,was not affected by selenate supply under 2 mmol·L^-1 sulfur.The soluble sugar content was improved by adding selenium（0-5 μmol·L^-1）regardless of sulfur concentration.The soluble protein and free amino acid were increased by increasing selenium（0-5 μmol·L^-1）at low sulfur concentration.Selenium content in shoot was significantly increased with increasing dose of applied selenium and considerably decreased by increasing sulfur supply.Sulfur content in shoot was significantly increased with increasing dose of applied sulfur,but was not influenced by selenium concentration.The contents of P,K,Ca,Mg,Fe and Mn in shoot were not considerably affected by selenium application,but the Cu content was significantly promoted by selenium application.Increasing sulfur concentration significantly decreased the contents of Ca,Mg,Cu and Mn in shoot,but did not significantly affect the contents of P,K and Fe.Increasing appropriate dose of selenium（0-5 μmol·L^-1）and sulfur significantly promoted the GSH content.Effect of selenium application on the AsA content was dependent on sulfur concentration.These results suggest that effects of selenium and sulphur supply on the antioxidant quality are important in leaf mustard.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2007年第5期539-543,共5页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
中德科学中心资助项目(GZ154
156).
关键词
叶用芥菜
硒酸盐
硫酸盐
品质
抗氧化物质
leaf mustard
Brassica juncea
selenate
sulphate
quality
antioxidant substances
