CHEN Shi-ming,WANG Meng,ZHAO Zhi-heng,et al.Study on the Reproductive Characteristics of Severe Blossom and Fruit Dropping of Camellia oleifera [J].Northern Horticulture,2014,38(02):94-98.
油茶异常落花落果现象的生殖特性
- Title:
- Study on the Reproductive Characteristics of Severe Blossom and Fruit Dropping of Camellia oleifera
- 文章编号:
- 1001-0009(2014)02-0094-05
- 分类号:
- S 794. 4
- 文献标志码:
- A
- 摘要:
- 以往年正常开花结果和异常落花落果的油茶样株为试材，采用碘-碘化钾溶液测定其花粉活力，苯胺蓝染色法观察花粉管生长情况，石蜡切片观察胚囊和雌配子体的发育，同时通过自然授粉和异花授粉试验观察各样株的坐果率及其动态变化规律。结果表明：正常开花结果的油茶树花粉活力、花粉管在花柱中的生长比例都明显比异常落花落果的油茶树高。方差分析表明，油茶坐果率与不同开花结果性状的样株显著相关，与授粉方式不相关。异常落花落果样株与正常开花结果样株相比,雌配子体发育更易出现异常和退化，致使胚珠畸形，导致花后落花落果严重，坐果率极低。
- Abstract:
- Taking normal-yield and low-yield Camellia oleifera trees as materials，pollen vitality was measured by iodine-potassium iodide solution，pollen tube growth in style was observed with fluorescent microscope after aniline blue dyeing，and paraffin-embedded sectioning technique was adopted to observe the development of abnormal embryo sac.Meanwhile，fruit setting data of natural pollination and cross pollination were collected to analysis the mechanism of blossom and fruit drops.The results showed that both the pollen vitality and the growth rate of the pollen tube of normal-yield C.oleifera trees were better than that of the low-yield one.The ovariance analysis showed fruit setting rate had a remarkable correlation to different sampling trees，yet had no correlation to pollination methods.Both of the two characteristic trees developed female gametophytes，compared with the normal-yield trees，abnormal and degenerated female gametophyte were more apt to appear in low-yield trees，which led to deformed ovule and serious blossom and fruit drops.
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备注/Memo
第一作者简介：陈世明（1986-），男，硕士，研究方向为经济林生殖生物学。E-mail:chenshming@sina.cn.