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苯甲酸、肉桂酸对西瓜幼根生长、显微及超微结构的影响

DOI: 10.3321/j.issn:1000-7091.2006.z1.019, PP. 77-80

Keywords: 西瓜,苯甲酸,肉桂酸,显微结构,超微结构

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Abstract:

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。

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