Pollen from 14 species of Haworthia (Family Liliaceae, Tribe Aloineae) were examined with the electron (scaning and transmission) and light microscopes. Optical microscope studies revealed a pollen size that depends upon the chromosome number; pollen grains of the diploid species are smaller than those from polyploid plants. Pollen grains are monoaperturate and, under the SEM, all 14 species display a perforated tectum. However, the proximal exine surface is smooth in some species and rough in others. The SEM study showed an identical tripartite ektexine composed of the foot layer, columellae and tectum in all species. The intine beneath the foot layer, however, exhibits certain variations in thickness. No differences in pollen fine structure of diploid and euploid plants could be detected. The need for further studies on the pollen ultrastructure was emphasized.
ISSN: 00319457
(62) Inv.: 01-008240 S.T.: AR-P/2 v 41 no 1/2 ej.1
Dirección: Av. Las Heras 727
Campus UNNE Resistencia, Chaco. CP 3500.
E-Mail: contacto@bib.unne.edu.ar
Nos encontramos dando servicios únicamente en forma virtual
Atención NO ES UNA RESERVA!
Es solo a los efectos de disponer de los datos del ejemplar para solicitarlo a biblioteca.
Tenga presente también que puede seleccionar favoritos
(los documentos que le interesen) durante su
sesión y obtener una lista de ellos.
Formulario para Solicitud de Material
Yuhl, D. E.
Light and electron microscope studies of Haworthia (Liliaceae) pollen / D. E. Yuhl; S. K. Majumdar
En: Phyton : revista internacional de botánica experimental = International journal of experimental botany. -- Vol. 41, no. 1-2 (1981). -- Buenos Aires : Fundación Rómulo Raggio, 1981
fot. byn.
Pollen from 14 species of Haworthia (Family Liliaceae, Tribe Aloineae) were examined with the electron (scaning and transmission) and light microscopes. Optical microscope studies revealed a pollen size that depends upon the chromosome number; pollen grains of the diploid species are smaller than those from polyploid plants. Pollen grains are monoaperturate and, under the SEM, all 14 species display a perforated tectum. However, the proximal exine surface is smooth in some species and rough in others. The SEM study showed an identical tripartite ektexine composed of the foot layer, columellae and tectum in all species. The intine beneath the foot layer, however, exhibits certain variations in thickness. No differences in pollen fine structure of diploid and euploid plants could be detected. The need for further studies on the pollen ultrastructure was emphasized.
ISSN: 00319457
1. POLEN; 2. HAWORTHIA; 3. LILIACEAE I. Majumdar, S. K.
(62) Inv.: 01-008240 S.T.: AR-P/2 v 41 no 1/2 ej.1