摘要
研究了外源Ｃａ２＋、ＢＲ对低温下玉米胚芽呼吸速率、膜透性以及对线粒体呼吸控制比、ＳＯＤ活性和ＭＤＡ含量的影响。结果表明，Ｃａ２＋、ＢＲ处理，相应提高了种苗胚芽的呼吸速率，降低膜透性。低温下经Ｃａ２＋、ＢＲ处理的玉米种苗，其线粒体有较高的呼吸控制比。Ｃａ２＋处理的线粒体中ＳＯＤ活性比对照高；ＭＤＡ含量比对照低。
The effects of exogenous Ca 2+ and BR on respiratory rate and membrance permeability of maize plumule as well as on RCR,SOD activity and MDA contents in maize plumular mitochondria under chilling temperature were studied.The results showed that exogenous Ca 2+ or BR treatments could increase the respiratory rate and decrease the membrane permeability.Higher mitochondria RCR was found in seedlings treated with Ca 2+ and BR under chilling temperature.The SOD activity in mitochondria treated by exogenous Ca 2+ was higher than that in the control,with lower MDA contents. It was considered that Ca 2+ and BR might keep up the normal structure and function of the membrance system and thus promote the chilling tolerance of maize seedlings.
出处
《华北农学报》
CSCD
北大核心
1996年第3期73-76,共4页
Acta Agriculturae Boreali-Sinica
