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东京野茉莉雌雄蕊的形态及显微结构(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年02期
Page:
34-40
Column:
研究论文
publishdate:
2017-03-23

Article Info:/Info

Title:
Microstructure of pistils and stamens in Styrax tonkinensis
Article ID:
1000-2006(2017)02-0034-07
Author(s):
XU Liping12 YU Fangyuan2*
1. Nantong Institute of Technology, Nantong 226001, China;
2. Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China
Keywords:
Styrax tonkinensis pistil and stamen scanning electron microscope(SEM) transmission electron microscope(TEM)
Classification number :
S718; Q944.58
DOI:
10.3969/j.issn.1000-2006.2017.02.006
Document Code:
A
Abstract:
【Objective】 Learn the morphology and microstructure of flowers, pistils and stamens in Styrax tonkinensis, and probe into the reasons of pollen abortion.【Method】The macrostructure, microstructure and ultrastructure of the pistils and stamens were studied by light and electron microscopy. 【Result】① There were 10 stamens composed of filaments and anthers in each bisexual flower. The width and length of a filament was approximately(0.38±0.12)mm and(8.24±0.72)mm, respectively. The mature anthers were composed of two narrow circular chambers. Three or four germinal furrows in the exine of mature pollen with finely reticulate ornamentation were observed by scanning electron microscopy(SEM). Furthermore, we observed a form of shrunken, poorly developed pollen. Using transmission electron microscopy, we observed that in well-developed pollen cells, there were two layers in the pollen wall, a dense cytoplasm, some Golgi apparatus, a large number of mitochondria, and a high proportion of electron dense materials and starch grains. ② There was one pistil per flower composed of a stigma, style and ovary. There were “Y”-type furrow and ellipsoidal mastoids on the stigma, and secretions after pollination. The style was hollow, and there were many anatropous ovules attached to the placenta on the inner wall of its three-chambered ovary. In the late period of development, only one or two of these ovules developed into seeds, whereas the others became degraded. 【Conclusion】The characteristics of S. tonkinensis flower were accordance with Styracaceae. The pollen had 3 forms. The stigma was wet type. The ovule was anatropous. There were rich cytoplasm and more organelles in the cells of the pollen and the integument.

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Last Update: 2017-03-23