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中国农学通报 ›› 2009, Vol. 25 ›› Issue (3): 164-169.

所属专题: 园艺

• 林学 园艺 园林 • 上一篇    下一篇

壳寡糖对黄瓜种子萌发和幼苗生长及光合特性的影响

郭卫华,赵小明,杜昱光   

  • 收稿日期:2008-09-17 修回日期:2008-11-27 出版日期:2009-02-05 发布日期:2009-02-05

Effects of Oligochitosan on the Seed Germination 、Seedling Growth and Photosynthetic Characters of Cucumber

  • Received:2008-09-17 Revised:2008-11-27 Online:2009-02-05 Published:2009-02-05

摘要: 摘 要: 应用不同浓度的壳寡糖处理黄瓜种子和幼苗,得出壳寡糖在低浓度时能够促进黄瓜种子发芽,最适浓度为0.1 mgL-1。试验结果同时表明低浓度壳寡糖对黄瓜幼苗生长有促进作用,使得幼苗株高、叶面积等生长指标,与对照相比均显著增加;功能叶片的叶绿素含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间CO2浓度(Ci)显著升高; 气孔限制值(Ls)显著降低。而高浓度(100 mgL-1)壳寡糖则抑制生长。促进黄瓜幼苗生长最适的壳寡糖浓度为0.1 mgL-1,施用两次的效果优于一次。

关键词: 蜂粮, 蜂粮, 酿制机理, 开发利用

Abstract: Abstract: Different concentrations of oligochitosan were used on cucumber seeds and seedlings,the results indi-cated: low conc.of oligochitosan promoted the germination of cucumber, the most optimum concentration of oli-gochitosan was 0.1 mgL-1.low conc.of oligochitosan promoted the growth of cucumber seedlings,the heights of seedlings and the areas of functional leaves were increased significantly(P < 0.05) which compared with ck, the contents of chlorophyll , the net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci) and transpiration rate (Tr)of tobacco seedlings were increased significantly (P < 0.05), while stomatal limita-tion (Ls) was reduced significantly (P<0.05) on cucumber seedlings.High conc.of oligochitosan (100 mgL-1)restrained the growth of cucumber seedlings. the most optimum concentration of oligochitosan for cucumber seedlings was 0.1mgL-1. The effect of using twice oligochitosan was better than using once.