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Microspores Development and Male Gametophytes Formation of Ottelia acuminate(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年17
Page:
99-104
Research Field:
Publishing date:

Info

Title:
Microspores Development and Male Gametophytes Formation of Ottelia acuminate
Author(s):
ZHAI Shuhua; YIN Genshen; DONG Xiaoqiong; HOU Siming; YANG Xiaohong
Life Science & Technology Department，Kunming University，Yunnan，Kunming 650214
Keywords:
Ottelia acuminata; microspore; male gametophyte; abnormality
PACS:
-
DOI:
10.11937/bfyy.20170569
Abstract:
Ottelia acuminata of the specific rare and endangered aquatic plant in China was used as material，on the growth of microspore mother cells and development of male gametophyte was carried out to explore its reproductive biological characteristics by using paraffin-cut section method.The results showed that 9—12 stamens might exist in one female flower，4 pollen sacs in each anther，with different shapes as butterfly，dumbbell，even anomalous formation occurring in its transection.In this experiment it was also elucidated that pollen wall differentiated successively into 4 layers of epidermis，endothelium，middle layer and tapetum，and the type of meiosis for its microspore mother cells belonged to continuous one；tetrads to symmetrical one with tetrahedral type occasionally.Besides，such abnormal phenomenon of microspore mother cells as micronuclei，chromosomes lagging and chromosome bridges was observed in its process of meiosis，suggesting that abnormal meiosis of microspore mother cells was the main reason for pollen abortion，which affected its reproduction of Ottelia acuminata，and thus became one of the main factors causing a decrease of its quantity and being endangered for Ottelia acuminata.

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Last Update: 2017-09-29