Evidence against the existence of varieties in Arctagrostis latifolia ssp. arundinacea (Poaceae)

1994 ◽  
Vol 72 (7) ◽  
pp. 1039-1050 ◽  
Author(s):  
S. G. Aiken ◽  
L. P. Lefkovitch ◽  
Susan E. Gardiner ◽  
W. W. Mitchell
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Guard Cell ◽  
Morphological Study ◽  
Seed Protein ◽  
Morphological Diversity ◽  
Guard Cells ◽  
Herbarium Specimens ◽  
Banding Patterns ◽  
Sds Page

The morphological diversity of North American specimens of Arctagrostis latifolia ssp. arundinacea (Trin.) Tzvelev was evaluated for possible varieties within the subspecies by considering (i) descriptions of three previously recognized taxa included in the subspecies, (ii) measurements of spikelet characters of the types of five taxa, (iii) Macoun's illustrations of spikelet diversity, (iv) a morphological study of 130 herbarium specimens, and (v) a transplant garden study. Characters thought to be uninfluenced by environment were examined. These included (i) the seed protein banding patterns revealed by SDS–PAGE, (ii) the guard cell sizes from plants of known chromosome number, and (iii) a study of anther lengths and pollen diameters. The data do not support the recognition of varieties. Key words: SDS–PAGE, transplant garden, pollen, chromosome number, guard cells, Arctagrostis, Poaceae, taxonomy.

ÉTUDES SUR LE GENRE SOLIDAGO L. : II. LA MISE EN ÉVIDENCE DE LA POLYPLOÏDIE ENDOTAXONIQUE CHEZ S. PURSHII PORTER ET LES TAXA SIMILAIRES

1958 ◽  
Vol 36 (5) ◽  
pp. 663-670 ◽  
Author(s):  
Jean R. Beaudry ◽  
Alexis Zinger ◽  
Jacques Saint-Pierre
Keyword(s):  
Chromosome Number ◽  
Geographical Distribution ◽  
Chromosome Numbers ◽  
Guard Cells ◽  
Morphological Characters ◽  
The Other ◽  
Herbarium Specimens ◽  
Positive Correlation ◽  
Rapid Technique

In Solidago Purshii Porter, there are two cytodemes, one diploid (2n = 18) and the other tetraploid (2n = 36), which can be distinguished on the basis of the length of the guard cells of their leaf stomata. The diploid plants possess guard cells which are smaller than those of the tetraploid. These two entities of S. Purshii thus belong to the groups of cytodemes in which there exists a positive correlation between the chromosome numbers and the dimensions of certain quantitative morphological characters, such as the length of the guard cells.In groups in which the variation curves of the characters of the different cytodemes overlap little or not, the geographical distribution of the different cytodemes of the complex may be studied much more easily, rapidly, and comprehensively by measuring the length of the guard cells of herbarium specimens than by making chromosome number determinations. The data presented indicate that when sampling is made under the conditions described in this paper, determinations of the length of two guard cells of stomata of one mid-leaf per individual, made on two individuals per colony, is satisfactory for that purpose, on the average. However, it is recommended, as a safeguard, to increase these figures by a few units, and to make always a few direct chromosome number determinations to check the accuracy of this rapid technique. These direct determinations may also be necessary to know the chromosome numbers of certain extreme individuals of the different cytodemes which have guard cells that differ little in length.

Distribution and chromosome number of Sonchus palustris in Slovakia

2020 ◽  
Vol 62 (1-2) ◽  
pp. 7-21
Author(s):  
M. Dudáš ◽  
P. Eliáš jun. ◽  
D. R. Letz ◽  
Z. Bártová ◽  
V. Kolarčik
Keyword(s):  
Chromosome Number ◽  
Red List ◽  
Herbarium Specimens ◽  
Distribution Map ◽  
Literary Sources ◽  
Different Types ◽  
New Localities ◽  
Recent Version

The distribution of Sonchus palustris in Slovakia was studied using herbarium specimens and literary sources. The herbarium studies, supplemented with targeted field search in the years 2015–2018, revealed 61 new localities and confirmed many other older locations. The species has been recorded in 19 phytogeographical districts and sub-districts of Slovakia. Most of the records are concentrated in the Podunajská nížina lowland in SW Slovakia and in the Ipel'sko-rimavská brázda region in southern Slovakia. Our results showed that the species is relatively common in different types of wetlands and its re-evaluation in the recent version of the Slovak red list is not needed. Chromosome number data for two new populations in eastern Slovakia (both 2n = 18) were counted. The distribution map is given.

Osmocytosis and Vacuolar Fragmentation in Guard Cell Protoplasts: Their Relevance to Osmotically-lnduced Volume Changes in Guard Cells

1993 ◽  
Vol 44 (10) ◽  
pp. 1569-1577 ◽  
Author(s):  
WILFRIED DIEKMANN ◽  
RAINER HEDRICH ◽  
KLAUS RASCHKE ◽  
DAVID G. ROBINSON
Keyword(s):  
Guard Cell ◽  
Guard Cells ◽  
Volume Changes ◽  
Guard Cell Protoplasts

scholarly journals A taxonomic revision of the genus Cleome L. (Capparaceae) in Bangladesh

1970 ◽  
Vol 14 (1) ◽  
pp. 25-36
Author(s):  
Hosne Ara ◽  
Bushra Khan ◽  
Md. Mansur-ul-Kadir Mia
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Geographical Distribution ◽  
Taxonomic Revision ◽  
Economic Importance ◽  
Plant Taxon

The available record of the genus Cleome L. for Bangladesh has been updated in this paper and includes C. diffusa, C. gynandra, C. hassleriana, C. rutidosperma and C. viscosa. The updating has been done in case of nomenclature with important synonyms, local names, description of the taxa along with illustrations, flowering and fruiting times, ecological notes, specimens examined and their geographical distribution. For identification of the species, a dichotomous bracketed key has been added in this paper. Information on chromosome number and economic importance have also been provided where available. Key words: Cleome, Taxonomic revision, Capparaceae, Bangladesh DOI: 10.3329/bjpt.v14i1.520 Bangladesh J. Plant Taxon. 14(1): 25-36, 2007 (June)

Taxonomic Revision of Euphrasia (Orobanchaceae) in South America

2021 ◽  
Vol 106 ◽  
pp. 392-423
Author(s):  
Ana Verónica Ortiz ◽  
Pablo Moroni ◽  
Fabiana Mirra ◽  
Rosa María Villanueva Espinoza ◽  
Nataly O'Leary
Keyword(s):  
South America ◽  
Native Species ◽  
Morphological Study ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
South American ◽  
South American Species ◽  
Arduous Task ◽  
First Time

Morphological boundaries between South American species of Euphrasia L. are controversial, rendering determination of specimens an arduous task. In this context, a comprehensive taxonomic revision of Euphrasia in South America is here provided for the first time. This study, based upon a classical morphological study of ca. 400 herbarium specimens, supports the recognition of eight species and one subspecies distributed in the Andean regions of Argentina, Bolivia, and Chile. From among native species, six belong to section Trifidae Benth. and one to the monotypic section Paradoxae Pugsley, endemic to Juan Fernández Islands; one adventive species, E. officinalis L., belongs to the section Euphrasia. The previously misunderstood presence of E. cockayniana Petrie is here untangled, and, consequently, the species is excluded from South America. A key to all Euphrasia taxa in South America, plus morphological descriptions, nomenclature items, geographical distribution and maps, habitat notes, illustrations, photographs, and discussion notes are included for the nine taxa. Eleven names are here synonymized, and lectotypes are designated for E. andicola Benth., E. debilis Wettst., E. flavicans Phil., E. intricata Phil., and E. philippii Wettst. Euphrasia andicola is reported for the first time for Argentina. This collaborative effort will represent a baseline for further investigations on Euphrasia in South America.

Studies on the Rosaceae II- SDS-PAGE Seed Protein Electrophoresis and its Significance in the Taxonomy of the Family

2003 ◽  
Vol 6 (21) ◽  
pp. 1820-1829
Author(s):  
A.E. Dowidar ◽  
E.A. Kamel ◽  
A.M. Ahamed ◽  
M.H.A. Loutfy ◽  
H.H.L. Hafez
Keyword(s):  
Seed Protein ◽  
Protein Electrophoresis ◽  
Seed Protein Electrophoresis ◽  
Sds Page ◽  
The Family

Inter and Intra-specific Variation in SDS-PAGE Electrophoregrams of Total Seed Protein in Chickpea (Cicer arietinum L.) Germplasm

2003 ◽  
Vol 6 (24) ◽  
pp. 1991-1995 ◽  
Author(s):  
Rehana Asghar ◽  
Tayyaba Siddique ◽  
Muhammad Afzal
Keyword(s):  
Cicer Arietinum ◽  
Seed Protein ◽  
Cicer Arietinum L ◽  
Sds Page ◽  
Specific Variation ◽  
Total Seed

scholarly journals PROTEINS OF PAROTOID GLAND SECRETIONS FROM TOADS OF THE GENUS BUFO

2000 ◽  
pp. 1-7 ◽  
Author(s):  
David Perry
Keyword(s):  
Amino Acid ◽  
Molecular Mass ◽  
Mass Range ◽  
Relative Molecular Mass ◽  
Terminal Amino Acid ◽  
Banding Patterns ◽  
Freeze Dried ◽  
Sds Page ◽  
Terminal Amino ◽  
Terminal Amino Acid Sequence

Freeze-dried parotoid gland secretions from toads of the genus Bufo contained large proportions of protein (25-35% by weight). SDS-PAGE suggested that secretions from several species of Bufo contained mixtures of proteins in the relative molecular mass range of approximately 12 - 200 kDa, which exhibited markedly different banding patterns from species to species. These proteins were presumably not discovered before because the previous extraction procedures used with these secretions were designed to examine low molecular mass compounds and would denature the proteins. SDS-PAGE of secretions from B. mauritanicus and B. calamita are shown here. The N-terminal amino acid sequence of one of the bands (approx. 58 kDa) of B. mauritanicus was found to be LPIPAFPGLDHGF and of a B. calamita band (30.5 kDa) was VQVFGLQKEA. No significant similarities to these two sequences and to three separate but partial N-terminal sequences obtained from these species were found in genetic databases.

Phylogenetic Relationships of Species of Hypselobarbus (Cypriniformes: Cyprinidae): An Enigmatic Clade Endemic to Aquatic Systems of India

Zootaxa ◽  
2012 ◽  
Vol 3499 (1) ◽  
pp. 63
Author(s):  
M. ARUNACHALAM ◽  
M. RAJA ◽  
M. MURALIDHARAN ◽  
RICHARD L. MAYDEN
Keyword(s):  
Genetic Diversity ◽  
Morphological Study ◽  
Morphological Diversity ◽  
Molecular Data ◽  
Mitochondrial Genes ◽  
Morphological Evidence ◽  
Species Relationships ◽  
Peninsular India ◽  
Morphological And Molecular Data ◽  
Eleven Species

Very little is known about the diversity and systematics of the genus cypriniform genus Hypselobarbus. Currently, the genusincludes at least eleven species, all endemic to freshwater systems of Peninsular India. While these species are commonlyknown in India and are frequently used as a food source, little is known about the morphological diversity within and betweenspecies and nothing is known regarding intraspecific genetic diversity or species relationships. Herein, we examine the geneticdiversity in the genus for 11 mitochondrial genes for eleven populations representing nine of the known 11 species.Hypselobarbus is resolved as monophyletic, with the inclusion of P. carnaticus, and species relatioships are very stronglysupported. Because of the unambiguous relationships strongly supported B. carnaticus is allocated to Hypselobarbus. Thisresearch and ongoing morphological and molecular work with the genus supports the existence of additional new species inpeninsular India in need of further molecular and morphological study. Genetic diversity in the genus is high; for the twospecies wherein more than one sample, and the two of each are suspected to represent undescribed taxa, these populationsexhibited greater genetic divergence than that observed between any two of the other currently recognized species,corroborating our hypothesis based on morphological evidence. Clearly the genus warrants more thorough geographicsampling and examination of morphological and molecular data/analyses to reveal the natural lineages existing in this endemic and enigmatic genus.

Can morphology and chromosome number contribute to species delimitation? A case in the Hibiscus trionum complex (Tribe Hibisceae, Malvaceae)

Phytotaxa ◽  
2019 ◽  
Vol 416 (4) ◽  
pp. 278-286
Author(s):  
MOHAMED OWIS BADRY ◽  
JENNIFER A. TATE ◽  
PRASHANT JOSHI ◽  
AHMED MAHMOUD ABBAS ◽  
SOHAIR THABET HAMED ◽  
...  
Keyword(s):  
Chromosome Number ◽  
Species Delimitation ◽  
Taxonomic Revision ◽  
Herbarium Specimens ◽  
Chromosome Counts ◽  
Comprehensive Description ◽  
Hibiscus Trionum ◽  
The World ◽  
First Time

A taxonomic revision of Hibiscus trionum from Egypt was undertaken using morphological and cytological studies of field collections and herbarium specimens. The data indicate that all specimens so far collected in Egypt belong to H. tridactylites, rather than H. trionum. This paper includes a comprehensive description of H. tridactylites, its occurrence, a comparison with other species in the H. trionum complex, and comments on habitat, along with images for easy identification. In addition, chromosome counts for this species from Egypt have been determined for the first time, which add to existing information on chromosome counts for the species from different regions of the world.

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