Fertility and pollen tube growth in polyploid melons(Cucumis melo L.)

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• 作者：Susiacue ; n ; Ignacio ; &Aacute ; lvarez ; José ; Marí ; a
• 关键词：triploidy ; tetraploidy ; pollen grain germination ; pollination ; fluorescence microscopy ; Cucumis melo ; melon
• 刊名：Euphytica
• 出版年：1997
• 出版时间：1997
• 年：1997
• 卷：93
• 期：3
• 页码：369-373
• 全文大小：59 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Physiology
  Plant Sciences
  Ecology
  
• 出版者：Springer Netherlands
• ISSN：1573-5060

文摘

The high sterility of tetraploid melon (Cucumis meloL.) plants is a serious inconvenient to obtain economicallyuseful polyploid lines. In order to study the alterations ondiploid pollen tube growth and their influence on sterility,in vitro and in vivo pollen tube growth fromthree commercial varieties and its tetraploids wasobserved. Polyploid pollen grains show a lowergermination percentage in vitro and a slowergermination rate than haploid pollen. Furthermore, diploidpollen grains producing two or three tubes and tubebranchings were observed on diploid pollen; this seems toindicate a decrease in its functionality. In vivo andin vitro pollen behaviours are quite similar, but aninteraction between the pollen and the pistillar tissues wasdetected in vivo. In the diploid × tetraploidcross, where fruits were not obtained, pollen tubesshowed a slow growth rate at the base of the pistil. Thepossible effects of these alterations in sterility arediscussed in terms of the factors that could affectfecundation.p>