Palynology of Carica and Vasconcellea (Caricaceae) Palinología de Carica y Vasconcellea (Caricaceae)

Abstract

<p align="justify">Palynology of <em>Carica</em> and <em>Vasconcellea </em>(Caricaceae). The pollen of <em>C. papaya</em> and agreements of <em>Vasconcellea cauliflora</em>, <em>V. cundinamarcensis</em>, <em>V. crassipetala</em>, <em>V. goudotiana</em>, <em>V</em>. x <em>heilbornii </em>var. <em>chrysopetala</em>, <em>V. longiflora</em> and <em>V. sphaerocarpa</em> collected in the Colombian Coffee Growing Zone, using the technique of acetolisis for optic microscopy and the fixation procedure with glutaraldehide, dehydration and ionization with gold-palade, for scanning electronic microscopy was described. The pollen grains were characterized using descriptors, which include the characters of taxonomic value for pollen identification, genetically determined. The most important are the number, position and character of the aperture (NPC) and exine ornamentation and stratification. The pollen is of medium size for both genera, tricolporate, zonoaperturate, prolate-spheroid to subprolate, isopolar radial symmetry, tectate, dug, foveolate, with columelas. These characters have demonstrated a great contribution to the taxonomy of Caricaceae because the cluster analysis allowed distinguish very well the two genera. </p><p align="justify">Se describe el polen de <em>C. papaya </em>y accesiones de <em>Vasconcellea cauliflora</em>, <em>V. cundinamarcensis</em>,<em> V. crassipetala</em>, <em>V. goudotiana</em>, <em>V.</em> x <em>heilbornii</em> var. <em>chrysopetala</em>, <em>V. longiflora</em> y <em>V.</em> <em>sphaerocarpa</em> recolectadas en la Zona Cafetera de Colombia, empleando la t&eacute;cnica de acet&oacute;lisis para microscop&iacute;a &oacute;ptica y el procedimiento de fijaci&oacute;n con glutaraldeh&iacute;do, deshidrataci&oacute;n e ionizaci&oacute;n con oro paladio, para microscop&iacute;a electr&oacute;nica de barrido (MEB). Se caracterizaron los granos de polen por medio de una lista de descriptores que incluyeron los caracteres de valor taxon&oacute;mico para identificaci&oacute;n del polen, gen&eacute;ticamente determinados, siendo los m&aacute;s importantes el n&uacute;mero, posici&oacute;n y car&aacute;cter de la abertura (NPC) y la ornamentaci&oacute;n y estratificaci&oacute;n de la exina. Para los dos g&eacute;neros el polen es mediano, tricolporado, zonoaperturado, prolato&ndash;esferoidal a subprolato, de simetr&iacute;a radial isopolar, tectado, cavado, foveolado, con columelas. Estos caracteres han demostrado gran aporte a la taxonom&iacute;a de Caricaceae, ya que el an&aacute;lisis de agrupamiento permiti&oacute; diferenciar bien a los dos g&eacute;neros.</p>

Keywords

• Carica
• Vasconcellea
• polen
• taxonomía
• pollen
• taxonomy