摘要:
采用水培方法,调节锌素营养供应,观察芹菜、玉米、小麦幼苗生长及幼苗叶片解剖结构。结果看出,锌素营养不足时植株含匀量降低,生长受到抑制:叶肉细胞收缩,细胞间隙增大,叶肉细胞中叶绿体数量减少。禾本科作物维管柬鞘细胞中叶绿体减少尤为明显,但对叶绿体的体积无影响;辅导组织发育受到抑制,机械组织不发达。锌素营养过剩时细胞结构破坏,叶肉细胞严重收缩,叶绿体明显减少。
关键词:
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锌
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叶片解剖结构
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芹菜
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小麦
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玉米
Abstract:
The growth state and leaf anatomic structure of celery, corn and wheat seedlings were observed by adjusting the Zn levels in water culture method. The deficiency of Zn caused the decreasae of Zn content in plant that inhibited the growth of seedlings. When Zn was deficient, the mesophyll cells contracted, the cell space increased, and the chloroplast number in mesophyll cells reduced. For cereal crops, the chloroplast number especially in vascular bundle sheath decreased obviosly, but there were no effect on the size of chloroplasts; the development of conducting tissue were inhibited and the machanical tissue developed badly. When Zn was excessed, the cell structure was destroyed, the mesophyll cells contracted seriously and the number of chloroplasts decreased obviously.
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