scholarly journals SYSTEMATICAL COMPARATIVE FOR TWO SPECIES AMARANTHUS albus L. AND AMARANTHUS gracilis DEFS. (AMARANTHACEAE) IN IRAQ

2017 ◽  
Vol 48 (3) ◽  
Author(s):  
S. A. Aliwy
Keyword(s):  
Geographical Distribution ◽  
Plant Species ◽  
Morphological Characters ◽  
The Other ◽  
Taxonomic Study ◽  
Flowering Period ◽  
Short Filament

This study dealt with comparative taxonomic study for the two species Amarantus albus L. and Amaranthus gracilis Defs. in Iraq . It was included the important morphological characters for roots, stems, leaves ,petioles ,inflorescences and its parts ,floral parts ,fruits and seeds . Also the dimensions and properties of each part have been recorded ,even its colors which helps in isolated and diagnosed the two species, the first one recognized by its white stems while the other one had red stems, also the first species characterized by axillaries sessile  inflorescences with so small florets  while the other one had terminal clusters spike inflorescence . Stamens were three in first species with short filament while they were 2-3 stamens with long filament in the other one. Also the study determined the rat of the flowering period for the two species as well as the study of ecological and geographical distribution for the two species in Iraq, the results documented with pictures. It could be depended to studied traits of the plant species for classification.  

Reestablishment of Cabomba schwartzii (Cabombaceae), an aquatic plant species endemic to the Brazilian Amazon

Phytotaxa ◽  
2018 ◽  
Vol 367 (3) ◽  
pp. 245 ◽  
Author(s):  
TIAGO D. M. BARBOSA ◽  
RAFAELA J. TRAD ◽  
MIKLOS M. BAJAY ◽  
MARIA I. ZUCCHI ◽  
MARIA DO CARMO E. DO AMARAL
Keyword(s):  
Geographical Distribution ◽  
Plant Species ◽  
Genetic Study ◽  
Aquatic Plant ◽  
Brazilian Amazon ◽  
Distinct Species ◽  
Morphological Characters ◽  
Species Description ◽  
Dichotomous Key ◽  
Herbarium Collections

Cabomba schwartzii was described by Rataj in 1977. The species discovered in the Brazilian Amazon was said to differ from other Cabomba species in having two sepals, two petals and a lobate petal base. According to the 1991 study of Ørgaard, C. schwartzii is similar to C. aquatica in other morphological characters (C. aquatica has flowers with three sepals and three petals) and since variation in number of floral parts is common in the genus, Ørgaard synonymized both species. After an analysis of C. schwartzii type material, other herbarium collections and location of four populations (two with C. schwartzii characteristics and two with C. aquatica characteristics), we conducted an integrated morphological and genetic study to evaluate whether or not C. schwartzii is a distinct species from C. aquatica. The results reveal the species to be distinct from each other and therefore C. schwartzii should be reestablished. The floral formula for C. schwartzii is K2 C2 A2+2 G1, versus K3 C3 A3+3 G2 for C. aquatica. A detailed species description and the geographical distribution of C. schwartzii are presented with a dichotomous key to distinguish both species, together with illustrations.

A numerical taxonomic study of variation in populations of Typhlodromus caudiglans Schuster (Acarina: Phytoseiidae)

1978 ◽  
Vol 56 (1) ◽  
pp. 55-65 ◽  
Author(s):  
D. A. Chant ◽  
R. I. C. Hansell ◽  
H. Rowell
Keyword(s):  
Host Plants ◽  
Numerical Taxonomy ◽  
Morphological Characters ◽  
The Other ◽  
Climatic Variables ◽  
Taxonomic Study ◽  
Multivariate Tests ◽  
Morphological Variations ◽  
Numerical Taxonomic Study ◽  
Typhlodromus Caudiglans

Variation in morphological characters between Canadian populations of Typhlodromus caudiglans Schuster (Acarina: Phytoseiidae) was examined by the methods of numerical taxonomy. Western populations are separated from the other populations when multivariate tests are used. Two subspecies are proposed, and Typhlodromella nodosus De Leon is synonymized with Typhlodromus caudiglans. Morphological variations between northern and eastern populations are correlated with climatic variables and with host plants.

scholarly journals Species of Centaurium Hill. in Iraq and its geographical distribution

2013 ◽  
Vol 10 (1) ◽  
pp. 22-31
Author(s):  
Baghdad Science Journal
Keyword(s):  
Geographical Distribution ◽  
Morphological Characters ◽  
Reproductive Organs ◽  
Taxonomic Study ◽  
Taxonomic Key ◽  
Taxonomic Importance ◽  
Species Separation ◽  
First Time ◽  
Time Form

Comparative taxonomic study has been compeleted for the species of the. genus Centaurium Hill. of Iraq. So the morphological characters were studied comparatively for the first time form Iraqi materials. Stems, leaves ,infloresences and reproductive organs characters were a good taxonomic importance. Geographical distrtribution has been done for the species of the genus in addition to the environment information. The results were presented with schedules, tables, maps and micrographs. Taxonomic key for the species separation was also presented.

scholarly journals Assessment of the DNA Barcodes Characteristic of Phalaenopsis deliciosa based on matK, rbcL, and ITS

2020 ◽  
Vol 8 (2) ◽  
pp. 138
Author(s):  
Nada Nisrina Maulidya ◽  
Siti Rohimah ◽  
Zakiyah Ramadany ◽  
Tri Ratnasari ◽  
Mukhamad Su'udi
Keyword(s):  
Dna Barcoding ◽  
Plant Species ◽  
Molecular Identification ◽  
High Specificity ◽  
Morphological Characters ◽  
Flowering Period ◽  
Dna Barcodes ◽  
Alternative Method

Indonesia has high biodiversity for plant species, including orchids with medicinal potential such as Phalaenopsis deliciosa. Generally, morphological characters, especially in flowers are used for orchids identification. However, when the plants are not in the flowering period, the identification becomes difficult. Therefore an alternative method, such as molecular identification (DNA barcoding) needs to be applied for the best solution. This research, which was conducted with three different markers found that the identity level of matK, rbcL, and ITS to other orchids species was 99-98%, 98%, and 94-96%, respectively. Furthermore, matK and ITS showed high specificity for Phalaenopsis deliciosa, and are therefore recommended as the best molecular identification marker of genus Phalaenopsis.

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.

Morphological variation and phylogenetic relationships within Eucalyptus series Subulatae (Myrtaceae) of southern Australia

2006 ◽  
Vol 19 (1) ◽  
pp. 59 ◽  
Author(s):  
D. Nicolle ◽  
M. A. Whalen ◽  
D. A. Mackay
Keyword(s):  
Phylogenetic Analysis ◽  
Geographical Distribution ◽  
Morphological Variation ◽  
Phylogenetic Relationships ◽  
Morphological Characters ◽  
The Other ◽  
Seedling Morphology ◽  
Seedling Characters ◽  
Seedling Characteristics

Morphological variation within Eucalyptus series Subulatae, a group of mallee and woodland tree taxa distributed across southern Australia, was assessed by adult and seedling characteristics. A phenetic study included a total of 51 adult morphological characters and 37 seedling characters, which were assessed for 564 individuals representing 163 populations, covering the broad geographical distribution of the series. All taxa included in the series by either Johnson and Hill (1999) or Brooker (2000) were included together with E. angustissima, E. cooperiana, E. falcata and E. salmonophloia, all of which have been at times included in, or considered closely related to, E. ser. Subulatae. The phenetic analyses indicate that the four subseries of Brooker (2000) are morphologically distinct, although their distinctiveness is only evident from seedling characters. The two subseries that Johnson and Hill (1999) recognise (subser. Flocktonianosae and Transcontinentalosae) corresponding to Brooker’s (2000) subser. Decurrentes, are more weakly defined. Southern populations of E. dolichocera are not considered here to belong to this species but rather to belong to a different subseries based on seedling morphology. A phylogenetic analysis of 44 morphological characters and 23 species of E. ser. Subulatae and 24 species from variously related taxa suggest that E. ser. Subulatae may not be monophyletic. Eucalyptus brockwayi and E. salmonophloia are basal to E. ser. Subulatae and all of the other taxa included in the analysis. Within E. ser. Subulatae, subsers Oleaginae and Spirales are both monophyletic. Both the phylogenetic and phenetic analyses strongly suggest that E. brockwayi is unique in several characters, including some not previously recognised, and is best placed in a monotypic series. The position of E. aspersa remains unresolved, but is probably best retained in E. subser. Decussatae. A key to the subseries of E. ser. Subulatae is presented and putative intersubserial, interserial and intersectional hybrids involving the series are cited.

Problems of species and the features of geographical distribution in colonial volvocine algae (Chlorophyta)

2020 ◽  
Vol 54 (2) ◽  
pp. 299-311
Author(s):  
A. G. Desnitskiy
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
World Literature ◽  
The Other ◽  
Disjunct Distribution ◽  
Published Data ◽  
Species Problem ◽  
Comprehensive Review ◽  
Volvocine Algae ◽  
Cryptic Taxa

More than ten new species of colonial volvocine algae were described in world literature during recent years. In present review, the published data on taxonomy, geographical distribution and the species problem in this group of algae, mainly from the genera Gonium, Pandorina, Eudorina, and Volvox, are critically discussed. There are both cosmopolitan volvocalean species and species with local or disjunct distribution. On the other hand, the description of new cryptic taxa in some genera of the colonial family Volvocaceae, such as Pandorina and Volvox, complicates the preparation of a comprehensive review on their geography.

UV ability to inactivate microorganisms combined with factors affecting radiation

1997 ◽  
Vol 35 (11-12) ◽  
pp. 107-112 ◽  
Author(s):  
A. M. Shaban ◽  
G. E. El-Taweel ◽  
G. H. Ali
Keyword(s):  
Microbial Communities ◽  
Uv Radiation ◽  
Contact Time ◽  
Tap Water ◽  
Scenedesmus Obliquus ◽  
Morphological Characters ◽  
The Other ◽  
Bacterial Cells ◽  
Dark Repair ◽  
Nile Water

In the present study, the effect of UV radiation on the inactivation of a range of microorganisms was studied. Each organism was seeded into sterile tap water and exposed to UV in batch experiments with changing turbidities. In addition, the effect of UV on microbial communities in river Nile water was examined. It was found that 1min contact time (0.5L/min flow rate) was effective against vegetative cells levels almost reaching zero (except with Staphylococcus aureus). On the other hand, spore-forming bacteria, Candida albicans and coliphage were more resistant to UV. This contact time caused coenobia cells in single form with Scenedesmus obliquus while for Microcystis aeruginosa colonies broke into smaller groups. Exposure of Nile water microbial communities to UV showed that yeasts and Aeromonas survived better than the other organisms while in the phytoplankton partial fragmentation occurred in some algal groups. The protective effect of turbidity differed between organisms, with increased contact time under conditions of stable turbidity having no effect on the organisms. At 20 NTU the UV radiation had no effect on the morphological characters of algal cells. In reactivation experiments, it is clear that photoreactivation, and not dark repair, takes place with bacterial cells. Only coliphage had no photoreactivation and dark repair responses although with coliphage and host, both reactivation processes worked well. Moreover, the irradiated algae regained their normal shape after 3 days in suitable media and enough light.

Pimpinella ibradiensis (Apiaceae), an unusual new species from Turkey

Phytotaxa ◽  
2015 ◽  
Vol 217 (2) ◽  
pp. 164 ◽  
Author(s):  
İlker Çinbilgel ◽  
özkan Eren ◽  
Hayri Duman ◽  
Mustafa Gökceoğlu
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
Related Species ◽  
Conservation Status ◽  
Identification Key ◽  
The Other ◽  
Site Conditions ◽  
Closely Related Species

Pimpinella ibradiensis, an unusual new species found in the Toka Yayla (İbradı, Antalya) in southern Anatolia, is described and illustrated. Site conditions, synecology and conservation status of P. ibradiensis are considered. In light of the comparison with the other closely related four species, namely P. nephrophylla, P. flabellifolia, P. sintenisii and P. paucidentata, its similarity within the genus are discussed. P. ibradiensis is easly distinguished from its relatives by its white petals, presence of bracts and bracteoles, larger fruits (4–5.5 × 1–2 mm), and having serrulate basal leaves with 60–95 strongly cartilaginous teeth along margins. The geographical distribution of P. ibradiensis and closely related species are mapped and the identification key of those species is updated.

Phylogenetic analysis of the subfamily Hylodinae (Anura, Leptodactylidae) based on morphological characters

2005 ◽  
Vol 26 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Francisca do Val ◽  
Paulo Nuin
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationships ◽  
Maximum Parsimony ◽  
Morphological Characters ◽  
The Other ◽  
The Family

AbstractThe systematics and phylogenetic relationships of the family Leptodactylidae are controversial as is the intrafamilial phylogeny of the leptodactylids. Here we analyze the relationships of the leptodactylid subfamily Hylodinae. This subfamily has been considered to be monophyletic and composed of three genera, Hylodes, Crossodactylus and Megaelosia. In the present study 49 characters were used, based on different studies on Leptodactylidae phylogeny. Maximum parsimony methods with unweighted and successively weighted characters were used to estimate the phylogeny of the Hylodinae. Upon analysis, the data provided further evidence of the monophyletic status of the three genera, with Megaelosia being the basal genus and the other two genera being sister taxa. The analysis with successive weighting results in a more resolved topology of the species subgroups of the genus Hylodes and separates this genus from Crossodactylus and confirms that the hylodines are monophyletic.

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