摘要
冷胁迫条件下的香蕉幼苗分别经不同浓度的BR处理后,相对于对照来说,在一定的处理浓度范围内,可以明显的降低电解质外渗率,提高低温胁迫下香蕉幼苗叶片中SOD的活性,一定程度上提高了低温胁迫下香蕉幼苗叶片中可溶性蛋白的含量,减缓叶片中MDA的含量变化,可溶性糖含量明显的提高,减少叶片萎蔫面积和死亡率,同时,明显的减缓了叶片中叶绿素降解的速度。这些代谢产物的变化,对提高香蕉幼苗冷胁迫期间的抵抗能力起着非常关键和重要的作用。保护效果最好的浓度是:0.9mg·L^(-1)。
The banana seedlings were treated with brassinolid （BR） of different concentrations under the cold-stressed condition. Comparing to the control, the treatment with certain concentration may obvious reduce the electrolyte leakage rate, increase SOD activity, enhance the soluble protein content at a certain extent, slow down the MDA content change, distinctly enhance soluble sugar content, slow down the area of wither and mortalityrate as well as delay the chlorophyll degraded speed of the banana seedling leave. These changes of metabolite have played a key role and important function in enhancing cold-stressed period resistance of banana seedlings. The concentration with the best protected effect is 0.9 mg · L^- 1.
出处
《植物研究》
CAS
CSCD
北大核心
2008年第2期195-198,221,共5页
Bulletin of Botanical Research
基金
海南省自然科学基金项目(80516)
海南省教育厅基金项目(hjsk2006011)
关键词
香蕉
油菜素内酯(BR)
抗冷性
banana（ Musa paradisiaca L. ）
brassinolid（BR）
chilling-resistance
