摘要
自毒作用是导致西瓜连作障碍的重要因素之一。本试验是利用已知的西瓜主要自毒物质—苯甲酸和肉桂酸,研究其对西瓜幼根的生长、显微结构及超微结构的影响。用苯甲酸、肉桂酸处理萌发的西瓜种子能显著影响西瓜幼根的生长。随着苯甲酸、肉桂酸处理浓度的增大,胚根长度变短。观察根尖的显微结构及超微结构发现:苯甲酸、肉桂酸处理可导致根尖细胞的细胞核变形,核仁异常,细胞质稀疏,液泡增多、变大。苯甲酸对液泡的影响比肉桂酸大,而对核仁的影响,肉桂酸比苯甲酸大。
Inhibitory effect is one of the important factors causing the problem in continual watermelon mono-cropping system. The study was about the effects of main inhibitory substance -- benzoic acid and cinnamic acid on radicle growth, microstructure and ultrastructure of watermelon. Benzoic acid and cinnamic acid significantly effected watermelon radicles elongation. With the increasing of benzoic acid and cinnamic acid concentration, the growth speed was decreased, and the radicles were short. Through the observation to the root tip microstructure and ultrastructure it was found that benzoic acid and cinnamic acid could result to root tip nuclei irregular, nucleolus abnormal, and cytoplasm sparse. Vacuoles became more and bigger. The Effects of benzoic acid treated on vacuoles was more significant than cinnamic acid treated. But to nucleolus, the effects of cinnamic acid treated was more significant than benzoic acid treated.
出处
《华北农学报》
CSCD
北大核心
2006年第B10期77-80,共4页
Acta Agriculturae Boreali-Sinica
基金
北京市自然科学基金资助项目(6972014)
关键词
西瓜
苯甲酸
肉桂酸
显微结构
超微结构
Watermelon
Benzoic acid
Cinnamic acid
Microstructure
Ultrastructure
