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草业学报  2014 

去花对菊芋干物质和糖分积累与分配的影响

DOI: 10.11686/cyxb20140118, PP. 149-157

Keywords: 菊芋,去花,生物量,果聚糖,HPLC

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Abstract:

本研究以菊芋品种青芋二号为试材,在温室进行全生育期栽培试验,研究了青芋二号干物质和糖分积累分配以及去花处理(摘掉花朵)对青芋二号块茎干物质和糖分含量的影响。结果表明,叶片中主要糖分是还原糖,块茎、茎中主要是非还原糖。青芋二号在开花期时总生物量达到最大值,之后地上部生物量减少,地下部由于此时块茎正处于膨大生长阶段,生物量继续增加。去花处理对青芋二号的块茎生物量有着明显的影响,具体表现为块茎数量增多了39.67%,块茎个头变大了59.46%,块茎干重比未去花的增加22.53%。去花植株相同干重下的块茎组织中的总糖含量与未去花植株相比显著降低但还原糖含量没有差异。通过HPLC-ELSD(高效液相色谱-蒸发光检测仪)检测发现去花处理对糖的成分与含量也有影响,蔗果五糖含量增加了32.47%,更高聚合度的果聚糖有增加的趋势,但是其他糖的含量与对照相比差异不大。

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