The pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen grains and a single species exhibited, only tetrac...

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Main Authors: Saulo M. Sousa, Patrícia M.O. Pierre, Giovana A. Torres, Lisete C. Davide, Lyderson F. Viccini
Format: Article
Language:English
Published: Academia Brasileira de Ciências 2013-01-01
Series:Anais da Academia Brasileira de Ciências
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Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100147
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author Saulo M. Sousa
Patrícia M.O. Pierre
Giovana A. Torres
Lisete C. Davide
Lyderson F. Viccini
author_facet Saulo M. Sousa
Patrícia M.O. Pierre
Giovana A. Torres
Lisete C. Davide
Lyderson F. Viccini
author_sort Saulo M. Sousa
collection DOAJ
description The pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen grains and a single species exhibited, only tetracolporate pollen. The amb ranged from triangular to square, and the shape varied from oblate-spheroidal to prolate-spheroidal. Three different types of exine ornamentation were observed: psilate, scabrate and perforate. In addition to morphological data, we found positive association between the chromosome numbers and size of pollen grains, and also between the length and width of the colpi. The results indicate that the characteristics of pollen grains in Lippia may be used as an additional taxonomic character of the genus.<br>A morfologia pol&#237;nica e a estrutura da exina de 17 esp&#233;cies de Lippia L. foram investigadas neste trabalho utilizando microscopia de luz e microscopia eletr&#244;nica de varredura. Dentre as esp&#233;cies estudadas, 14 apresentaram gr&#227;os de p&#243;lens tricolporados, duas apresentaram p&#243;lens tri e tetracolporados e uma &#250;nica esp&#233;cie apresentou p&#243;lens tetracolporados. O &#226;mbito variou de triangular a quadrado, e a forma variou de oblato-esferoidal &#224; prolato-esferoidal. Tr&#234;s diferentes tipos de ornamenta&#231;&#227;o da exina foram observados: psilada, escabrada e perfurada. Em adi&#231;&#227;o aos dados morfol&#243;gicos, encontramos associa&#231;&#245;es positivas entre o n&#250;mero cromoss&#244;mico e o tamanho dos gr&#227;os de p&#243;len e tamb&#233;m entre o comprimento e a larguara dos colpos. Os resultados indicaram que as caracter&#237;sticas dos gr&#227;os de p&#243;len no g&#234;nero Lippia podem ser utilizadas como um caracter taxon&#244;mico adicional do g&#234;nero.
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spelling doaj.art-a9b9f923c5704687a42a2b583d9e859a2022-12-22T00:55:16ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências0001-37651678-26902013-01-01851147157Saulo M. SousaPatrícia M.O. PierreGiovana A. TorresLisete C. DavideLyderson F. VicciniThe pollen morphology and exine structure of 17 species of Lippia L. were investigated in this work using light and scanning electron microscopy. Among the species studied, 14 showed tricolporate pollen grains, two had tri- and tetracolporate pollen grains and a single species exhibited, only tetracolporate pollen. The amb ranged from triangular to square, and the shape varied from oblate-spheroidal to prolate-spheroidal. Three different types of exine ornamentation were observed: psilate, scabrate and perforate. In addition to morphological data, we found positive association between the chromosome numbers and size of pollen grains, and also between the length and width of the colpi. The results indicate that the characteristics of pollen grains in Lippia may be used as an additional taxonomic character of the genus.<br>A morfologia pol&#237;nica e a estrutura da exina de 17 esp&#233;cies de Lippia L. foram investigadas neste trabalho utilizando microscopia de luz e microscopia eletr&#244;nica de varredura. Dentre as esp&#233;cies estudadas, 14 apresentaram gr&#227;os de p&#243;lens tricolporados, duas apresentaram p&#243;lens tri e tetracolporados e uma &#250;nica esp&#233;cie apresentou p&#243;lens tetracolporados. O &#226;mbito variou de triangular a quadrado, e a forma variou de oblato-esferoidal &#224; prolato-esferoidal. Tr&#234;s diferentes tipos de ornamenta&#231;&#227;o da exina foram observados: psilada, escabrada e perfurada. Em adi&#231;&#227;o aos dados morfol&#243;gicos, encontramos associa&#231;&#245;es positivas entre o n&#250;mero cromoss&#244;mico e o tamanho dos gr&#227;os de p&#243;len e tamb&#233;m entre o comprimento e a larguara dos colpos. Os resultados indicaram que as caracter&#237;sticas dos gr&#227;os de p&#243;len no g&#234;nero Lippia podem ser utilizadas como um caracter taxon&#244;mico adicional do g&#234;nero.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100147número cromossômicoLippiapalinologiapalinomorfologiapólenVerbenaceaechromosome numbersLippiapalynologypalynomorphologypollenVerbenaceae
spellingShingle Saulo M. Sousa
Patrícia M.O. Pierre
Giovana A. Torres
Lisete C. Davide
Lyderson F. Viccini
Anais da Academia Brasileira de Ciências
número cromossômico
Lippia
palinologia
palinomorfologia
pólen
Verbenaceae
chromosome numbers
Lippia
palynology
palynomorphology
pollen
Verbenaceae
topic número cromossômico
Lippia
palinologia
palinomorfologia
pólen
Verbenaceae
chromosome numbers
Lippia
palynology
palynomorphology
pollen
Verbenaceae
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100147