珠芽魔芋换头生长和多叶连续生长

为了探究珠芽魔芋在换头生长中球茎膨大机理和多叶连续生长现象。通过田间小区随机区组设计种植两个品种的珠芽魔芋,从球茎横切面,叶片数量,叶柄的围茎和高度来描述两种生长现象。结果表明:换头生长过程中,新叶从主芽叶原基部位连续产生,随着新芽从珠芽魔芋母球发出,新的球茎同时形成并逐渐膨大,母球提供营养促进萌发后逐渐萎缩,新球茎形成并快速长出新的根系吸收营养。在本试验环境条件下,多叶现象非常普遍,可多达7叶,且后长出的叶片叶柄高度和粗度比先长出的逐渐递增。珠芽魔芋换头后的新球茎能产生丰富的须根系,特有的多叶连续生长延长了魔芋球茎田间生长期,多个叶片增加了植物光合作用叶面积,促进营养积累,为球茎膨大提供物质基础。

Corm Changing Growth and Continuous Growth Petiole Leaves on Amorphophallus bulbifer(Roxb.) Bl

In order to research the mechanism of corm expand during the changing growth and the continuous growth petiole phenomenon of A.bulbifer(Roxb.) Bl.Two varieties were planted in random block of field plot.These two growth phenomenas were discribed by the vertical section of corm,number of the petiole,and the height and diameter of petiole.The results showed that the new leaves were germinated from the leaf primordium during the corm changing period with the new leaf growing from the mother corm,the offspring corm was decreasing while it was forming process on Amorphophallus bulbifer(Roxb.) Bl.The mother corm supplied nutriment to promote the germination of leaf and then went to shrink little by little,then the offspring corm produced lots of fibrous roots which was abundant to absorb nutriment.In this experiment condition,the continuous growth petiole phenomenon of A.bulbifer(Roxb.) Bl was a common phenomenon,one corm could produced up to 7 petiole leaves,the petiole height and roughness were increased with later germinating leaf.The offspring corm will produce lots of fibrous roots which were abundant to absorb nutriment after changing corm.The special continuous growth petiole extend the growth duration in the field,increase the area of leave for photosynthesis.They were more efficiently to accumulate more nutriment which could promote the corm swells.