CAJ | 학술논문

文章采用室内砂培法研究了不同浓度盐胁迫下白苏幼苗根系活力,植株体内脯氨酸、超氧阴离子( O2.-)、丙二醛( MDA)的含量,以及抗氧化酶活性( SOD、CAT)的变化规律.结果表明：植株在盐浓度≤50 mmol/L的环境下,根系活力有所提高,之后活力呈现下降趋势,且随胁迫的Na+浓度增大,下降的幅度变大.植株体内的脯氨酸含量却随着Na+胁迫的浓度的升高而增加.当Na+浓度≤100 mmol/L时,SOD、CAT酶的活性呈现上升趋势,植株体内的MDA、O2.-含量尽管有所增加,但增加的幅度不大；之后随着Na+胁迫的浓度升高,SOD、CAT的活性呈现下降趋势,且植株体内的O2.-、MDA的含量明显增多.
문장채용실내사배법연구료불동농도염협박하백소유묘근계활력,식주체내포안산、초양음리자( O2.-)、병이철( MDA)적함량,이급항양화매활성( SOD、CAT)적변화규률.결과표명：식주재염농도≤50 mmol/L적배경하,근계활력유소제고,지후활력정현하강추세,차수협박적Na+농도증대,하강적폭도변대.식주체내적포안산함량각수착Na+협박적농도적승고이증가.당Na+농도≤100 mmol/L시,SOD、CAT매적활성정현상승추세,식주체내적MDA、O2.-함량진관유소증가,단증가적폭도불대；지후수착Na+협박적농도승고,SOD、CAT적활성정현하강추세,차식주체내적O2.-、MDA적함량명현증다.
This article adopted indoor sand culture to test physiological the responses of Perilla seedlings with differ-ent NaCl concentration. When plants were stressed by different concentrations of salt, the root activity, the change of praline, the content of the ultra oxygen anion ( O2. -) , malondialdehyde ( MDA) , and the activity of antioxidant enzymes ( SOD, CAT) were studied. The results showed that the plant root activity was enhanced in the low con-centration of salt(≤50mmol/L)and then presented a downtrend, and a larger decline occurred with the increase of stress concentration of Na+. Enzyme ( SOD, CAT ) activity showed a trend of rise when the concentration of Na+was no more than 100 mmol/L. The content of MDA and O2. - increased no more in this situation. Then activity of SOD and CAT showed a trend of decline with the concentration of Na+ stress increasing. The contents of the O2. -and MDA inside plants increased obviously. Proline increased with the Na+ concentration increasing. It was benefi-cial to plants’ absorption of the moisture.