پديد آورندگان :
مهرافرين، ا. نويسنده Department of Cultivation and Development, Institute of Medicinal Plants, ACECR, P.O. Box, 13145-1446, Tehran Mehrafarin, .A , ميقاني، ف. نويسنده Weed Research Department, Iranian Plant Protection Research Institute, P.O. Box, 19395-1454, Tehran Meighani, .F , باغستاني-ميبدي، م. ع. نويسنده Research Scientist, Weed Research Department, Plant Pests and Diseases Research Institute, P.O. Box 1454, Tehran 19395 Baghesani-Meybodi, .M .A , منتظري، م. نويسنده Plant Pests & Diseases Research Institute, Tabnak Avenue, Evin, Tehran 19395-1454 Montazeri, .M , لبافي، م. ر. نويسنده Weed Research Department, Iranian Plant Protection Research Institute, P.O. Box, 19395-1454, Tehran Labbafi, .M .R
كليدواژه :
biotype , Principal component analysis , Ecotype , Field bindweed
چكيده فارسي :
در فصل رويشي سالهاي 1385 و 1386، با استفاده از روشهاي تجزيه چند متغيره، تفاوتهاي ريختشناسي جمعيتهاي پيچكصحرايي در استان تهران مورد بررسي قرار گرفت. براي تعيين اين تفاوتها، 43 صفت ريختشناسي و فيزيولوژيكي بررسي بيومتريكي شدند. مهمترين صفات موثر در تجزيه صفات به مولفههاي اصلي (PCA) براي تمايز بيوتيپها، وزن خشك برگ، وزن خشك اندام هوايي و سطح برگ بودند. اما براي تمايز جمعيتها، صفات آلومتريك بويژه نسبت وزن خشك ريشه معيار قرار گرفتند. نتايج نشان داد كه اكوتيپهاي پيچكصحرايي در اثر سازش با محل جغرافيايي خود بوجود آمدهاند. تغييرات در فنولوژي و ريختشناسي بيوتيپهاي پيچكصحرايي ممكن است گوياي ماندگاري و سازش يك جمعيت از اين علفهرز بر حسب تغييرات شرايطمحيطي و روشهاي مديريت آن باشد.
چكيده لاتين :
Morphophysiological variations of field bindweed populations in Tehran province was studied during 2006 and 2007 growing seasons using multivariate analysis methods. To determine the variations, 43 morphological and physiological characters were considered biometrically. The main characters at principal component analysis (PCA) consisted of leaf dry weight, shoot dry weight, and leaf area to identify the biotypes. But, the populations were identified based on allometric variables, particularly root weight ratio. The results suggested that field bindweed ecotypes have been formed while the species adapted to specific geographic locations. Factor analysis based on PCA revealed that twelve factors comprise almost 85% of total variations for field bindweed populations in three locations of Tehran province. Phenological and morphological variabilities among biotypes may explain the survival and adaptability of a population of this weed as a result of environmental and field management changes.