Showing 10 results for Eae
Volume 8, Issue 1 (12-2009)
Abstract
For genus Erigeron L. four species were reported from Iran in Flora Iranica treatment Erigeron annuus (L.) Pers. is recorded here from Iran (Guilan province) for the first time. This species is native of Northern America and Canada and widely naturalized in Europe and Asia. An identification key for all the Iranian species is presented here. With addition of this species now, the genus includes five species in Iran.
Volume 8, Issue 4 (11-2010)
Abstract
Due to high morphological similarity between Triticum turgidum L. and T. aestivum L., using 34 quantitative and nine qualitative spike morphological characters, the taxonomic status and the variations of spike morphology between 22 accessions of T. turgidum and 42 accessions of T. aestivum were studied. Consequently, the statistical coefficients such as Mean, Coefficient of Variation, Cluster Analysis and Factor Analysis were applied. The results of this study show that these two species were differentiated by spike morphological characters, such as the length of spike and glume, and the awn length of lemma and glume. The diversity and variability of spike morphological characters among T. aestivum accessions are higher than those of T. turgidum accessions. It can be concluded that there would be a relatively high gene flow in T. aestivum accessions.
Volume 11, Issue 1 (10-2011)
Abstract
The taxonomy and morphology of 24 Salvia atropatana Bunge (Lamiaceae) accessions were studied in Iran. The morphological variations are mostly related to the indumentum and trichome frequency in surface and base of stem, leaf length, form of leaf margin, indumentum of leaf surface, form of bract margin, indumentum of bracteole surface, indumentum of calyx surface, corolla length, indumentum of corolla surface and style length. The cluster analysis based on Euclidian Distance Coefficient and SPSS V.11.5 software was used to determine the infra-specific relationships. The results of cluster analysis show diversity among the accessions of this species. Based on the findings, it can be concluded that the morphological variability of S. atropatana accessions is due to the polymorphism, and infra-specific hybridization.
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Volume 11, Issue 1 (10-2011)
Abstract
Plants from papilionoideae Subfamily of fabaceae family have a papilionoid flower. Glycyrrhiza glabra is an important plant of this family and is a perennial and bushy plant which includes raceme inflorescences with blue or dark violet flowers. Flower has synsepalous calyx with five lobes that at adaxial surface has secretory hairs. Corolla has three kinds of petals: a vexillium, two wings and two keels. In contrast to other petals, wings have secretory locules more and are darker in color. Keels do not attach to each other. Androecium is decamerous, diadelphous, heteromorphy. Anther characters are: tetrasporange, extrorse, longitudinal dehiscence, four wall layers, simultaneous cytokinesis, secretory taptum and sheroidal pollen. Gynoecium is monocarpate with campilotropous and crossinucelate ovules, open style and disk shaped stigma. Secretory thricomes are seen on the outer side of sepals. Fruit is pod with 2-5 seeds, which even at maturity stage has secretory thricomes. Eventually, it seems that flower color, its papilionoid structure, numerous secretory thricomes on ovary wall, sepals and wings are important charachters at insect attraction.
Jamil Vaezi, Fatemeh Batyari, Hamid Ejtehadi, Mohammad Farsi, Mohammad Reza Joharchi,
Volume 11, Issue 4 (2-2012)
Abstract
The genus Salvia is morphlogically investigated to provide an identification key based on morphological characters in the Northeast of Iran. In this study, we examined more than 350 herbarium and collected specimens of different populations and measured 79 quantitative and qualitative (vegetative and generative) characters. The results of the multivariate analysis (principal component analysis) and Nonparametric Test (K independent samples) indicate that the morphological characters such as blossom shape, ring of trichome inside of corolla and protrusion style differentiated the Salvia species. For the first time, the species Salvia shariffi is reported in the Jonoubi and Shomali Khorassans.
Saeed Irian, A. Darash,
Volume 13, Issue 1 (5-2013)
Abstract
Species of the genus Citrus grow in different parts of Fars province. The present study aimed at investigating the ontogeny of Citrus grandis pollen grains and petal secretory sacs. Flowers and blossoms were collected from the gardens located in Jahrome during the flowering period, fixed in FAA and stored in 70% ethanol. Samples were prepared and embedded in paraffin and sectioned using a rotary microtome. To examine petal secretory sacs, petals were placed in a glycerine-alcohol mixture, and sections were prepared for light microscopy using a sterilized razor blade. Results showed anthers with four pollen sacs. Cytokinesis appeared simultaneous, and the microspore tetrads were of a tetrahedral type. Pollen grains at a time of dispersal have two cells, containing four vegetative openings with reticulo-faveolate decorations. In the initial petals, three tissues were detected with tightly packed dividing cells. Throughout petal developmental stages, the rate of epidermal cell division was reduced, while parenchymal tissue differentiation was limited to an increase in cell dimensions, cell wall thickening and the intercellular space. In addition, the number and size of the vascular bundles increased during growth. The formation of petal secretory sacs is limited to the first stage of its development, while later in the development, this structure only increased in dimensions. In conclusion, based on our histological examinations, Citrus grandispetal secretory sacs change in a five stage process
, A Shahsavari,
Volume 13, Issue 1 (5-2013)
Abstract
During autumn and summer 2010 observed species from Amaranthus genus were studied in segetal and ruderal environments of Hamedan city. In this research, 100 plats randomly were selected and totally 6 species from Amaranthus were identified as neophyte wild elements: A. retroflexus L. A. lividus L., A. chlorostachys Willd, A. albus L., A. viridus L. and A. blitoides S. Watson. Dispersal of mentioned species in many segetal (such as farms and urban green spaces) and ruderal (such as wastelands, beside of walls and etc.) areas with remarkable dispersal, indicates suitable adaptation of this elements with antropogenic biotops. Among collected species, A. retroflexus L. with highest dispersal in farm lands and gardens, with H5 (&alpha-euhemerob) hemeroby degree as a segetal plant and A. blitoides S. Watson.with H6 (Polyhemerob) hemeroby degree in pavings and asphalts clef, as a severely ruderal plant are introduced from Hamedan city. other observed species of this genus, with H4 (b-euhemerob) hemeroby degree more grow in beside of walls, gardens, urban green spaces and et
Volume 18, Issue 45 (6-2008)
Abstract
This project was conducted to study the taxonomy of tribe Vicieae based on morphological characters. The specimens were collected from different parts of Khorassan, and after identification they were preserved at Ferdowsi University of Mashhad Herbarium (FUMH). Diagnostic keys and a complete list of distribution regions for all species of this tribe in Khorassan were presented. Cicer kermanense, Vicia truncatula, V. cappadocica, V. variabilis, Lens culinaris, Lathyrus pratensis and V. sphaericus are reported for the first time for the flora of Khorassan provinces and V. pseudocassobica is probably as a synonym of V. venulosa.
Volume 18, Issue 56 (9-2006)
Abstract
Multiple sclerosis (MS) is one of the degenerative diseases of the central nervous system (CNS), which results in the destruction of myelin sheath. MS could be induced in laboratory animals, by injection of ethidium bromide (EB) into Cerebrospinal Fluid (CSF). This disease may cause impotence or subfertility in men. The objective of this study was to evaluate the role of MS on spermatogenesis, sperm parameters such as… and sex hormones of wistar rats. A total of 36 rats (5 weeks old) were divided into 3 groups of control, sham and experimental. 20ul of physiological saline was injected into cerebellomedullary cistern (CC) of rats in sham group, and, 20ul of EB was injected into CC of experimental group. One week after EB injection, two rats from each group were killed randomly to investigate the morphology of pons. The rest were killed 5 weeks after injections to study the spermatogenic cells, sperm parameters and sex hormones. The results showed that sperm progressive motility was significantly reduced from 74.4 2.2 in control group to 60.61.4 in experimental group (p<0/001). Also, the number of round cells was increased from /73 0/1 in control group to 2.16 /25 in experimental group (p
Volume 18, Issue 58 (8-2004)
Abstract
Astragalus kurdaicus Saposhn. ex Sumn is now considered as an additional species of the flora of Iran. This species was introduced from Middle Asia, and is also recorded from NE Iran. It belongs to Astragalus section Cystium.
