caa a22 4500 477134084 CHVBK 20180405111712.0 cr unu---uuuuu 170330e19970201xx s 000 0 eng 10.1023/A:1002904817971 doi (NATIONALLICENCE)springer-10.1023/A:1002904817971 Fertility and pollen tube growth in polyploid melons (Cucumis melo L.) [Elektronische Daten] [Ignacio Susiacue;n, José Álvarez] The high sterility of tetraploid melon (Cucumis melo L.) plants is a serious inconvenient to obtain economically useful polyploid lines. In order to study the alterations on diploid pollen tube growth and their influence on sterility, in vitro and in vivo pollen tube growth from three commercial varieties and its tetraploids was observed. Polyploid pollen grains show a lower germination percentage in vitro and a slower germination rate than haploid pollen. Furthermore, diploid pollen grains producing two or three tubes and tube branchings were observed on diploid pollen; this seems to indicate a decrease in its functionality. In vivo and in vitro pollen behaviours are quite similar, but an interaction between the pollen and the pistillar tissues was detected in vivo. In the diploid × tetraploid cross, where fruits were not obtained, pollen tubes showed a slow growth rate at the base of the pistil. The possible effects of these alterations in sterility are discussed in terms of the factors that could affect fecundation. Kluwer Academic Publishers, 1997 triploidy nationallicence tetraploidy nationallicence pollen grain germination nationallicence pollination nationallicence fluorescence microscopy nationallicence Cucumis melo nationallicence melon nationallicence Susiacue;n Ignacio Unidad de Tecnología en Producción Vegetal, SIA-DGA, Campus de Aula Dei, Apdo. 727, 50080, Zaragoza, Spain aut Álvarez José Unidad de Tecnología en Producción Vegetal, SIA-DGA, Campus de Aula Dei, Apdo. 727, 50080, Zaragoza, Spain aut Euphytica Kluwer Academic Publishers 93/3(1997-02-01), 369-373 0014-2336 93:3<369 1997 93 10681 https://doi.org/10.1023/A:1002904817971 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002904817971 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Susiacue;n Ignacio Unidad de Tecnología en Producción Vegetal, SIA-DGA, Campus de Aula Dei, Apdo. 727, 50080, Zaragoza, Spain aut NATIONALLICENCE 700 1- Álvarez José Unidad de Tecnología en Producción Vegetal, SIA-DGA, Campus de Aula Dei, Apdo. 727, 50080, Zaragoza, Spain aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 93/3(1997-02-01), 369-373 0014-2336 93:3<369 1997 93 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer