Results 261 to 270 of about 84,624 (300)

Style morphology and pollen tube pathway

Plant Reproduction, 2017
The style morphology and anatomy vary among different species. Three basic types are: open, closed, and semi-closed. Cells involved in the pollen tube pathway in the different types of styles present abundant endoplasmic reticulum, dictyosomes, mitochondria, and ribosomes.
M. M. Gotelli, E. C. Lattar, L. M. Zini, B. G. Galati   +3 more
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Pollen Morphology of Tribulaceae

Grana, 1987
Abstract The pollen morphology of the Tribulaceae Hadidi, was investigated by means of LM, SEM, and TEM. In the Tribulaceae, two completely different pollen types are encountered, each restricted to one of the two stenopalynous subfamilies. The Tribuloideae invariably have polypantoporate, spheroidal, sometimes slightly elliptical, reticulate pollen ...
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Pollen morphology of Ulmaceae

Grana, 1983
Abstract Thirty-two species from 17 genera were examined by scanning electron microscopy and representatives from each subfamily were examined by transmission electron microscopy. The treatment of Ulmaceae based on pollen grains is consistent with the treatment of the family presented by I. A. Grudzinskaya.
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Pollen morphology in the trimeniaceae

Grana, 1984
Abstract Piptocalyx macrurus Gilg & Schlechter, P. moorei Oliver and Trimenia neocaledonica Baker f. have disulculate, globose-elliptic or globose-spherical to globose-elliptic grains, with finely reticulate or rugulose (T. neocaledonica) structure. T. papuana Ridley has dimorphic pollen, with only one type on an individual plant, consisting of either ...
F. B. Sampson, P. K. Endress
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Pollen Morphology of Jordanian Cruciferae

1987
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Lahham, J N, Al-Eisawi, D
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Trends in pollen morphology: 6th bibliographic index to pollen morphology of angiosperms

Grana, 1991
Abstract The sixth volume in the series of bibliographic indices to the pollen morphology of the angiosperms initiated by G. Thanikaimoni in 1972 is analysed with respect to the three main instruments used for the description of the pollen grains, viz, light microscopy, scanning electron microscopy and transmission electron microscopy.
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POLLEN MORPHOLOGY OF SCHEFFLERA (ARALIACEAE)

American Journal of Botany, 1978
Pollen of 48 species of Schefflera was studied by light and scanning electron microscopy. Eight pollen types are distinguished on the basis of sexine sculpturing and structure, apertural shape, and shape and size of the grains. These pollen types correlate well with other data such as the number of carpels, the condition of corolla, infloresence types,
Charles C. Tseng, Jane R. Shoup
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Pollen Morphology

2021
Fernando Ramírez, Thomas Lee Davenport
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Pollen Morphology as an Index to Plant Relationship. I. Morphology of Pollen

Botanical Gazette, 1925
The paper reports a study of pollen morphology in numerous genera of about eighty families represented in the flora of Colorado, together with a small number of familiar exotic forms. A discussion is given of the general interest of pollen, with methods of study and preservation. Pollen shapes are described, as well as markings, size, color, stickiness,
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Pollen morphology in thePortulacaceae (Centrospermae)

Folia geobotanica & phytotaxonomica, 1992
Pollen of 110 species from 18 genera in thePortulacaceae has been examined by light and scanning electron microscopy, and a representative number by transmission electron microscopy. Three basic pollen types were found: 3-colpate with thick tectum and foot layer with prominent unbranched columellae and an extremely thin endexine; pantoporate with thick
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