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中国农学通报

中国农学通报 ›› 2008, Vol. 24 ›› Issue (12): 247-250.

所属专题： 生物技术； 园艺

• 农学 农业基础科学 • 上一篇    下一篇

Nacl 和pH胁迫对大蒜根、芽生长及细胞分裂的影响

张爱民   

  • 收稿日期:2008-07-31 修回日期:2008-10-17 出版日期:2008-12-05 发布日期:2008-12-05

Effects of Nacl and pH Stress on Growth of Roots and Duds and cell division in Garlic

  • Received:2008-07-31 Revised:2008-10-17 Online:2008-12-05 Published:2008-12-05

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摘要： 摘要：本文研究了不同NaCl浓度和pH对大蒜根、芽生长及根尖细胞有丝分裂的影响。结果表明，0.3%NaCl对大蒜根、芽的萌发和生长有一定的促进作用；适合大蒜根、芽萌发和生长的pH为6.5到7.5； 一定浓度的NaCl对增加大蒜根尖细胞前期和中期分裂指数有一定效果，但对总的细胞分裂指数影响不大；pH变化对大蒜根、芽萌发生长和根尖细胞分裂的影响较小；pH与NaCl结合可加剧对大蒜根、芽生长和细胞分裂的影响；较高浓度的NaCl胁迫可引起大蒜根尖细胞分裂的异常行为，如出现染色体桥、三极分裂和染色体解体等；此外，NaCl胁迫可明显影响根部伸长区细胞的正常伸长，是引起根生长缓慢的一个重要因素。

Abstract: Abstract: Effect of different NaCl concentrations and pH values on garlic growth and cell division were studied in this paper. The results showed that 0.3% NaCl could stimulate growth of the garlic shoot and root in a certain degree, and suitable pH values for garlic growth were from 6.5 to7.5; Mitotic index for prophase or metaphase in root tip cells was a little higher under low concentration of NaCl than that of normal condition; Efect of different pH values on garlic growth and cell division was not obvious; Interaction of NaCl and pH could intensify the impediment for garlic growth and cell division; Over 0.7% NaCl could cause some abnormal behavior during the mitosis, such as chromosomal bridges, tri-pole spindle and chromosome disintegration. In addition, NaCl stress could significantly affect root cell elongation.