Showing 12 results for Iran
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 1 (12-2009)
Abstract
This study was carried out in Kalat highlands of Gonabad located in East of Iran with the altitude of 1100 to 2830 m.a.s.l. The mean annual percipitation and temperature are 143.2 mm and 17.2 C, respectively. The aim of study was to identify and to introduce the flora, to determine chorology of plant species and to define their growth forms. Altogrther 190 plant species belong to 107 genera and 39 families were determined. The most important families were Asteraceae, Poaceae and Lamiaceae. Astragalus and Cousinia were the main genera. The life form spectrum, based on Raunkiaer, revealed that Therophytes with 36.84% and Hemicryptophytes with 36.32% are the dominant life forms. According to Zohary, Chorological characteristics of the plant species showed that most of them were Irano-Turanian elements. About 8 species were endemic to Iran. The species Phlomidoschema parviflorum is a rare and semi-endemic to Gonabad region. According to the IUCN, two categories of plant species viz. vulnerable (VU) and lower risk (LR) were introduced. There were 14 threatened plant species in the area
Volume 8, Issue 2 (10-2009)
Abstract
The Caspian sea as a unique habitat has accommodated Rutilus frisii kutum for as long as the course of history but has undergone extreme ecological & managerial disturbances over the recent centuries which has in turn, borought about dire consequences including the formation of a potentially fragile ecosystem. In fact, various researches undertaken on this issue has shown that the specter of such ominous changes in ecosystem and the living resources of the Caspian Sea loom near. The present study aims at investigating the sexual and biological aspects of fish &their sex organs in Rutilus f. Kutum along the southern coasts of the Caspian Sea. To this end, the fish and gonad samples of Rutilus f. kutum migrating to rivers & estuaries were collected & analyzed through sampling procedures based on fish gonad. Upon treating the samples with Bouin & the related preparations, (I.e. extraction of water, making from the sample them transparent, molding & doing them based on H&E method), , whereas Peterson correlation coefficient was applied for toxic variables. The results of the analysis shows that 45 percent of sampled fish with an average length of (349 58) mm weighing 564 334) were male and 54.4 were Females. The sexual maturity rate, as specified by the six stages analysis me Thad of Johnson’s (Johnson’s, 1970) in dictated the position of female in the stages: IV & V during March, April & June. 32% of female fish were in stage V & %68 in stage IV in March whereas the percentages of female fish in April was %87 in the stage V followed by %94 in the stage V during June.
Volume 8, Issue 4 (11-2010)
Abstract
In order to identify the mycoflora of North-East forests of Iran, nine species of Ascomycetes in Shahid Zare and Siah Roodbar forests were collected and transferred to the lab. These species belonged to 4 order, 6 families and 7 genera including, Helvella acetabulum, H.crispa, H.macropus, Hymenoscyphus albidus, Lasiosphaeria spermoides, Peziza arvernensis, Tarzetta catinus and Xylaria hypoxylon. Among these, Bisporella subpallida, Helvella macropus, Hymenoscyphus albidus,Lasiosphaeria spermoides, Peziza arvernensis and Tarzetta catinus are new taxa for Iranian fungal flora
Volume 8, Issue 4 (11-2010)
Abstract
Caprini is one of the largest sections belonging to the genus Astragalus with 280 species. Astragalus Sect. Caprini are revised. This section has 171 and 115 species in Flora Iranica area and Iran, respectively. During the work, plant specimens preserved in Ferdowsi University of Mashhad, Herbarium (FUMH) were indentified from different regions of Khorassan provinces. Also, distribution of regions in different parts of this section are presented. Based on this study, 37 species of this section are known in Khorassan provinces. A. kushkensis in Flora Iranica has been recorded from Turkmenistan and Afghanistan and is reported from NE. of Khorassan, Torbate – jam, Saleh Abad as a new record for the flora of Iran. This plant is glabrous and has 18 – 22 pairs of leaflets. Leaflets are narrowing ovate and glabrous. Distribution regions of these taxa in different parts of Khorassan province are given.
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.
M Assadi, F. Ghahremaninejad, T. Nejadsattari, I. Mehregan, K. Poursakhi,
Volume 14, Issue 3 (10-2014)
Abstract
Genus Cerastium belongs to the subfamily Alsinoideae. This genus is represented with about 30 species in two subgenera (subgenus Dichodon and subgenus Cerastium) and three sections (sect. Strephodon, sect. Orthodon and sect. Schizodon) in flora Iranica area, of which 19 species were reported from Iran. The materials in the TARI herbarium were studied. The vegetative and reproductive characteristics of specimens were checked by stereomicroscope. In family Caryophyllaceae, the seeds bear numerous characters which can be used for taxonomic purposes. The ornamentation features of the seed surface and its relief are different from one species to another. The seeds were carefully taken from mature and dehiscent capsules. Pollen grains obtained from flowers bearing mature anthers. In this paper, Cerastium pentandrum (Caryophyllaceae) is reported as a new record from northwest Iran and Iranian plateau. It belongs to the subg. Cerastium sect. Orthodon. In this section teeth of the capsule are elongated, straight or reflexed, with flat or recurved margins. Morphological characteristics of the new record are provided. This taxon is compared with its closest relative C. balearicum. The ultrastructure of seed and pollen is examined by SEM.
Volume 18, Issue 47 (4-2007)
Abstract
One of the most important subjects of watershed basins is the protection of soil and water resources with regarding to control of erosion and sediment yield. The empirical methods for estimation of erosion rates and sediment yield measures such as PSIAC and EPM more emphasize environmental factors so mach so that the important lithological agents are not considered. Therefore, in this research attempts are made to propose a suitable and comprehensive method for inherent sensitivity of lithological units. To this end rock units are classified based on mineralogical composition and their textures in 10 orders of erodibility. The order of erodibility of each formation will be hased on average of lithological components. This method is used for microcontinental plate of central Iran to evaluate the model. Based on outcomes of the mentioned classification, more than 83 percents of rock units are classified from moderate- weak to totally loose and sensitive order. In average, the basin is categorized as very sensitive to erosion. With regarding to obtained results in comparison to specific sediment yield rate that obtained from statistical analysis of observed measures, the accuracy and the ability of the method is confirmed.
Volume 18, Issue 48 (2-2007)
Abstract
A major part of structural studies is the analysis of elements of fold style. In this paper, the elements of main folds style in the Alborz – Central, Iran border zone, were investigated. In this respect, cylindricity, symmetry, style of a folded surface, style of a folded layer and style of a folded multilayer were evaluated. Finally, fold style characteristics and young history of folding in the studied area were indentified. In addition, two main mechanisms (Buckle and Detachment Folding) were distinguished.
Volume 18, Issue 54 (8-2001)
Abstract
Flysch – Iranshahr – makran-Structure-Penci
Volume 18, Issue 56 (9-2006)
Abstract
Premenstrual syndrome is a common cyclic problem among the young and middle -aged women which occurs in the luteal phase of the mestrual cycle. It is characterized by a combination of distressing physical, psychological and behavioral symptoms. The prevalence and frequency of syndrome (PMS) was assessed in all students living in an undergraduate female dormitory of Teacher Training University. The results of this study showed that among 326 nuliparous students, 98.2% of them regularly experienced symptoms consistent with PMS. The 4 most common symptoms were abdominal pain, backache, depression and anger. In this study the most disagreeable symptoms were abdominal ache (29.1%), backache (21.6%), anger(9.7%) , anxiety( 9%), and social withdrawal (8/80%) . There was an association between the city of origin and some of the symptoms such as: depression and acne in north of Iran and abdominal ache and back pain in east of Iran. About 43% of students had familial history of PMS and 51% of them took drug for decreasing their symptoms. A severe form of Premenstrual syndrome is premenstrual dysphoric disorder (PMDD), which its prevalence among the university students was 16.9% .
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.
