Taxonomic significance of stomatal complex in the Portulacaceae

1986 ◽  
Vol 97 (11-12) ◽  
pp. 763-766
Author(s):  
Bio Louis Nyananyo
Keyword(s):  
Taxonomic Significance ◽  
Stomatal Complex

scholarly journals Taxonomic significance of stomatal complex in fifteen species of Dendrobium Swartz (Orchidaceae) of Nepal

2018 ◽  
Vol 30 ◽  
pp. 28-38
Author(s):  
Baba Maiya Pradhan ◽  
Devendra M. Bajracharya
Keyword(s):  
Leaf Surface ◽  
Morphological Characters ◽  
Epidermal Cells ◽  
Stomatal Index ◽  
Taxonomic Significance ◽  
Stomatal Frequency ◽  
Complex Type ◽  
Surface Type ◽  
Stomatal Complex ◽  
The Family

Dendrobium Swartz is one of the largest and most problematic genus of the tribe Dendrobieae of the family Orchidaceae. Nepal harbors about thirty-one species of Dendrobium. Micro morphological characters like the stomatal complex in fifteen species of DendrobiumSwartz (Orchidaceae) of Nepal were studied for understanding the taxonomic significance of stomatal complex within the genus. For the study of stomatal complex of leaf, Carpenter’smethod was followed. Stomatal index and stomatal frequency were calculated using formulagiven by Salisbury. The terminologies used for the stomatal complex type were followed those of Patel. In all species the leaf surface was found hypostamic. Tetracytic (a-tetra-monocyclic,b-tetra-monocyclic and c-tetra-monocyclic) and eupara twi-monocyclic with hexa-monocyclictypes of stomata were recorded in the genus. Tetracytic type was found in fourteen species and eupara twi-monocyclic with hexa-monocyclic was found in only one species. The elliptical shape of stomata was found in more species than the circular shape. The epidermal cells of leaf was found rectangular, square, polygonal to irregular. The distribution of stomata on leaf surface, type of stomata and shape of epidermal cells were found to be taxonomically significant. These characters could be used as distinguishing characters to delimit the species in the genus.

Palynological study on some species of Convolvulaceae and its taxonomic significance

Taeckholmia ◽  
2005 ◽  
Vol 25 (1) ◽  
pp. 47-60 ◽  
Author(s):  
Ahmed Osman ◽  
Kadry Abdel khalik
Keyword(s):  
Taxonomic Significance ◽  
Palynological Study

Spore characterisation and its taxonomic significance in ferns from Lagos State, Nigeria

Grana ◽  
2021 ◽  
pp. 1-16
Author(s):  
Peter Adegbenga Adeonipekun ◽  
Michael Babatunde Adebayo ◽  
Oyetola Olusegun Oyebanji
Keyword(s):  
Taxonomic Significance ◽  
Lagos State

scholarly journals Taxonomic significance of leaf surface morphology inAloesectionPictae(Xanthorrhoeaceae)

2009 ◽  
Vol 160 (4) ◽  
pp. 418-428 ◽  
Author(s):  
OLWEN M. GRACE ◽  
MONIQUE S. J. SIMMONDS ◽  
GIDEON F. SMITH ◽  
ABRAHAM E. VAN WYK
Keyword(s):  
Surface Morphology ◽  
Leaf Surface ◽  
Taxonomic Significance

Nondispersive Protein Bodies in Sieve Elements: A Survey and Review of their Origin, Distribution and Taxonomic Significance

IAWA Journal ◽  
1991 ◽  
Vol 12 (2) ◽  
pp. 143-175 ◽  
Author(s):  
H.-Dietmar Behnke
Keyword(s):  
Electron Microscope ◽  
Protein Bodies ◽  
Evolutionary Trends ◽  
Taxonomic Significance ◽  
Additional Species ◽  
Sieve Elements ◽  
P Protein ◽  
Taxonomic Range ◽  
Characteristic Features

Nondispersive protein bodies present in the sieve elements in addition to dispersive P-protein are characteristic features of many woody dicotyledons; their origin may be nuclear or cytoplasmic. While nuclear nondispersive protein bodies are found in only two families, the Boraginaceae and Myristicaceae, bodies of cytoplasmic origin are present in 39 of the more than 350 families screened. These results were obtained from 228 dicotyledons studied with the electron microscope and data of additional species from the literature. The terminology, origin, form and distribution of nondispersive protein bodies are discussed. Their ultrastructural composition is described as being predominantly spindle-shaped, compound- spherical, rod-shaped and rosette-like. Based on the data accumulated from over 450 species (of about 3000 screened) it is evident that their taxonomic range is confined to a few dicotyledon superorders. Compound-spherical nondispersive protein bodies are characteristic of most of the Malvanae/Violanae; spindle-shaped forms are restricted to the Fabaceae (Rutanae). Rosanae-Proteanae-Myrtanae and the Magnolianae are the only other superorders that contain nondispersive protein bodies in several of their families. Evolutionary trends and possible taxonomic consequences implied in this distribution are discussed.

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