scholarly journals Pollen morphology of Asian Vigna species (genus Vigna; subgenus Ceratotropis)from India and its taxonomic implications

2017 ◽  
Vol 41 ◽  
pp. 75-87 ◽  
Author(s):  
Suraj D. UMDALE ◽  
Makarand M. AITAWADE ◽  
Nikhil B. GAIKWAD ◽  
Latha MADHAVAN ◽  
Shrirang R. YADAV ◽  
...  
Keyword(s):  
Pollen Morphology ◽  
Vigna Species ◽  
Taxonomic Implications ◽  
Genus Vigna

Pollen morphology of Phyllosma and Sheilanthera (Diosminae: Rutaceae) and its taxonomic implications

Grana ◽  
2000 ◽  
Vol 39 (2-3) ◽  
pp. 103-107 ◽  
Author(s):  
Janine E. Victor ◽  
Abraham E. Van Wyk
Keyword(s):  
Pollen Morphology ◽  
Taxonomic Implications

Taxonomic implications and evolutionary trends in pollen of Canadian Ericales

1986 ◽  
Vol 64 (12) ◽  
pp. 3113-3126 ◽  
Author(s):  
Barry G. Warner ◽  
C. C. Chinnappa
Keyword(s):  
Pollen Morphology ◽  
Evolutionary Relationships ◽  
Evolutionary Trends ◽  
Fungal Symbiont ◽  
Pollen Types ◽  
Taxonomic Implications ◽  
The Individual ◽  
Individual Grains ◽  
Evolutionary Progression ◽  
Scanning Electron

The pollen of 61 of about 80 taxa of Ericales that occur in Canada are described through the use of light and scanning electron microscopy. Five main pollen types are recognized: (I) compact tetrads in which the individual grains are not clearly delimited when rolled and viewed in all positions, and possessing costae endopori or costae endocolpi, (II) tetrads in which the individual grains are clearly and consistently delimited, occasionally possessing costae endopori or costae endocolpi, (III) a category in which grains within the tetrad are not consistently delimited, and lack costae endopori or costae endocolpi, (IV) loose tetrads in which individual grains are poorly fused, and (V) monads. A key identifies general morphological distinctions among the pollen groups or species. This survey of the pollen morphology of the Ericales supports conventional taxonomic treatments. We favour treatment of Monotropaceae and Pyrolaceae as separate families and suggest the elevation of Orthila secunda to its own monotypic family. The Clethraceae and Orthila secunda may be better treated outside the Ericales. We propose that the tetrad pollen of most Ericales is a derived condition from the more primitive trizonocolporate monad of the Cyrillaceae, Clethraceae, and Orthila secunda. Subfamily Vaccinioideae (Ericaceae) and Empetraceae, through subfamily Rhododendroideae (Ericaceae), to Pyrola and Moneses (Pyrolaceae), and finally to Chimaphila (Pyrolaceae) represent the evolutionary progression based on a trend from compact tetrads to loose individual grains within the tetrad. Finally the most advanced group is represented by the zonoaperturate monads of the Monotropaceae. This evolutionary progression based on pollen morphology is in accord with general principles of tetrad formation during microsporogenesis and with evolutionary relationships suggested by the macromorphology, phytochemistry, embryology, and degree of dependence on a fungal symbiont.

Pollen morphology ofAdenandra(Rutaceae: Diosminae) and its taxonomic implications

Grana ◽  
1999 ◽  
Vol 38 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Janine E. Victor ◽  
Abraham E. van Wyk
Keyword(s):  
Pollen Morphology ◽  
Taxonomic Implications

Pollen morphology of the genus Skimmia (Rutaceae) and its taxonomic implications

2008 ◽  
Vol 121 (5) ◽  
pp. 463-471 ◽  
Author(s):  
Tomoko Fukuda ◽  
Akiyo Naiki ◽  
Hidetoshi Nagamasu
Keyword(s):  
Pollen Morphology ◽  
Taxonomic Implications

scholarly journals Pollen morphology ofDiosmaandColeonema(Rutaceae: Diosminae) and its taxonomic implications

Grana ◽  
1999 ◽  
Vol 38 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Janine E. Victor ◽  
Abraham E. van Wyk
Keyword(s):  
Pollen Morphology ◽  
Taxonomic Implications

scholarly journals Pollen morphology of Carapa species (Meliaceae) from the Brazilian Amazon

2016 ◽  
Vol 46 (3) ◽  
pp. 333-336
Author(s):  
Alexsandro ZIDKO ◽  
Luiz Antônio RODRIGUES ◽  
Cláudia Barbieri Ferreira MENDONÇA ◽  
Maria Lucia ABSY ◽  
Marcos Gonçalves FERREIRA ◽  
...  
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Brazilian Amazon ◽  
Microscopy Study ◽  
The Other ◽  
Carapa Guianensis ◽  
Equatorial Diameter ◽  
Taxonomic Implications ◽  
Scanning Electron

Abstract The crabwood (Carapa) represents an important source of natural resources. The objective of this work was to study the pollen morphology of the three species of Carapa (Meliaceae) registered in the Brazilian Amazon. The pollen grains were obtained from floral buds, pistillate and staminate flowers of Carapa guianensis, C. surinamensis and C. vasquezii. In order to explore the taxonomic implications of the pollen study for these species of Carapa, lactic acetolysis method was used for light microscopy study. Furthermore, the non-acetolyzed material was used in the study of the scanning electron microscopy. It was found that the three Carapa species present little variations in pollen morphology. Compared to the other species this study, Carapa vasquezii has higher values for the length and width of endoaperture; however, it has lower values for polar and equatorial diameter, equatorial diameter in polar view and apocolpium side.

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