文献类型：期刊文献

中文题名：马占相思种子园结荚率低的原因探析

英文题名：Study the Reasons of Low Pod of Acacia mangium Seed Orchard

作者：詹妮[1] 黄烈健[1] 李军[1]

第一作者：詹妮

机构：[1]中国林业科学研究院热带林业研究所

年份：2016

卷号：38

期号：9

起止页码：46-52

中文期刊名：西南大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：国家"十二五"科技支撑计划项目(2012BAD01B0402)

语种：中文

中文关键词：马占相思;种子园;结荚率;原因

外文关键词：Acacia mangium Willd; seed orchard; low podding rate; reasons;

分类号：S722.1

摘要：为揭示马占相思种子园结荚率低的原因,开展了马占相思花部器官及花粉结构的观察、访花昆虫及中华蜜蜂的SEM观察、控制授粉等研究.结果表明:马占相思表现为雌蕊先熟,雄蕊平均长度为(4.04±0.35)mm,雌蕊平均长度为(4.53±0.38)mm,雌蕊比雄蕊稍长,不利于接受花粉;马占相思成熟的花粉为16合复合花粉粒,由16粒单花粉结合而成,中间为上下2层,每层各4粒,周围8粒,不利于风媒传粉;马占相思的访花昆虫主要为中华蜜蜂,其采集的花粉几乎100%为单株花粉,不利于异交授粉;马占相思的自交不亲和指数小于0.002,为高度自交不亲和性.马占相思雌蕊先熟,雌蕊比雄蕊稍长,成熟花粉粒结构特点,访花昆虫的作用及自交不亲和等特性,是造成马占相思种子园结荚率低的主要原因.
In order to reveal the reason of low podding rate of Acacia mangium seed orchard,the Acacia mangium floral organs and pollen structure were observed,the pollinators and Apis cerana SEM were observed,and the controlled pollination trails were studied.The results showed that the Acacia mangium expressed protogyny and the average length of stamen was（4.04±0.35）mm and the average length of the pistil was（4.53±0.38）mm.The pistil was slightly longer than stamens,so it was not easy to accept the pollen.The mature Acacia mangium pollen grain were combined and formed by 16 single pollen grains,and it had 2layers（upper and lower）in the middle,each layer had 4grains and had 8grains around.The structure of mature Acacia mangium pollen grain made it not easy to pollinate by wind.The flower visiting insects mainly was Apis cerana,which collected almost 100% pollen from one plant and not good for cross pollination.The ISI of Acacia mangium was less than 0.002,so it manifested as the high incompatibility.The features of protogyny,the slightly longer pistil and the structure of mature pollen grain,the visiting insects and self incompatibility were the main reasons for the low podding rate of Acacia mangium seed orchard.