摘要
利用芒果花枝短截后剪口芽在当年还能再次进行花芽分化并开花结果的现象,对剪口叶、附近韧皮部及芽的葡萄糖含量进行检测。结果表明:剪口叶、附近韧皮部和剪口芽内葡萄糖含量于短截当日最高,分别为93.0、71.71和54.09μg/g;剪口叶于2月25日降至最低值(25.09μg/g),韧皮部3月12日最低(0μg/g),剪口芽2月20日最低(0μg/g),各检测部位平均含量分别为51.64、24.67、27.90μg/g。剪口叶、韧皮部,芽和生长中心间存在明显的葡萄糖库-源流向性,表明葡萄糖是此时段内物质运输的主要形式,也是进行花芽分化的主要能量物质基础。剪口芽芽眼中心颜色于2月20日出现蜡黄迹象,25日向芽体四周扩散;3月2～7日,芽体逐渐膨大,蜡黄色加深、芽眼呈半透明状;3月7日后绿色逐渐增加,半透明状消失。
It is observed that after cutting back flowering branch of Mango, the flower bud on the cutting place can still carry out differentiation. We measured the glucose content in leaves, phloem and buds on the cutting section. The results indicated that the cut- ting leaves, nearby phloem and the buds＇ highest contents appeared on the same day of cutting back, separately were 93.0, 71.71, and 54.09 μg/g. The leaves＇ lowest content appeared on February 25th（25.09 μg/g）, phloem＇ s appeared on March 12th（0 μg/g）, and buds＇ appeared on February 20th （0 μg/g）. The average contents of each parts were 51.64, 24.67, 27.9 μg/g. There was obvi- ous glucose library - source relationship among the leaves, phloem, buds and the organic centre, which indicated that glucose was the mainly transported form at this section. After cutting back, the center color of bud eye gradually presented wax -yellow on February 20th, and spread around on the 25th. The buds gradually expanded, the color deepened, the buds eye presented translucent from March 2na to March 7th. It gradually became green, and the translucent disappeared after March 7th.
出处
《江西农业学报》
CAS
2012年第11期5-7,共3页
Acta Agriculturae Jiangxi
基金
云南省基金资助项目(2007C0058M)
云南省教育厅科学研究基金资助项目(2010Y338)
关键词
芒果
花芽分化
结果母枝
短截
葡萄糖
Mango
Flower bud differentiation
Fruiting branch
Cutting back
Glucose
