摘要
研究不同营养液浓度对土人参可溶性蛋白质含量、抗氧化系统及根系活力的影响。结果表明,与对照土培比,营养液培养的土人参叶片MDA的累积量随着营养液浓度的提高先降后升,以1倍营养液浓度培养的含量最低;同时土人参叶片中SOD、POD、CAT的活性和可溶性蛋白含量都有不同程度的提高,而ASA含量在营养液浓度小于1倍浓度时均有显著升高,这可能是土人参对养分胁迫的适应性响应。与土培相比,除水培外,处理所用的几种营养浓度都提高了土人参根系活力,且以1倍营养液浓度时活力最大。因此,初步推断营养液在低浓度时随着浓度的升高,促进土人参生长;高浓度营养液抑制土人参生长;1倍营养液浓度最适宜土人参生长。
The soluble protein content, antioxidant system, and root activity of Talinum paniculatum treated with different concentrations of nutrient solution were investigated. The results showed that in comparison with the control （ soil - culture）, the content of malondialhyde （MDA） in Talinum paniculatum leaves decreased at first and then significantly increased when the concentration of the nutrient solution increased, which was the lowest when 1 times dilute nutrient solution was applied. The activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT）, and the content of soluble protein were elevated to a certain extent, while the content of ascorbic acid （ASA） was obviously enhanced when the concentration of the nutrient solution was below 1 times. The root activities were all increased, especially in the treatment of 1 times concentration, except for water - culture. So it could be preliminarily inferred that： at low nutrient solution concentrations, the growth of Talinum paniculatum was promoted along with the increasing of concentration, and high concentrations of nutrient solution inhibited the growth. Among different concentrations, 1 times dilute nutrient solution was optimum for Talinum paniculatum.
出处
《江西农业学报》
CAS
2009年第8期86-90,共5页
Acta Agriculturae Jiangxi
关键词
土人参
抗氧化系统
根系活力
营养液培养
Talinum paniculatum
Antioxidant system
Root activity
Nutrient solution culture
作者简介
胡安生（1975-），男，讲师，农艺师，生物工程硕士，从事作物栽培的教学和研究工作。
