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مقایسه آناتومی چوب گونة اوجا (Ulmus carpinifolia Borkh.) بومی گرگان و کمیجان | ||
نشریه جنگل و فرآورده های چوب | ||
مقاله 6، دوره 66، شماره 1، فروردین 1392، صفحه 69-81 اصل مقاله (1.2 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jfwp.2013.35342 | ||
نویسندگان | ||
رضا اولادی* 1؛ حامد متینی بهزاد2؛ زهرا شریفی2؛ عباس معصومی2 | ||
1استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران | ||
2دانشجوی کارشناسی ارشد بیولوژی و آناتومی چوب، دانشکده منابع طبیعی، دانشگاه تهران، ایران | ||
چکیده | ||
بررسی و مقایسه آناتومی چوب و مرفولوژی الیاف درختان اوجا رشد یافته در مناطق گوناگون جغرافیایی علاوه بر معرفی ویژگیهای بافت چوبی این گونه برای دستهبندی و تمایز بین آنها، به فهم چگونگی تغییرات آناتومی چوب این گونه در پاسخ به شرایط مختلف اقلیمی کمک خواهد کرد. در این پژوهش برخی ویژگیهای آناتومی چوب و الیاف درختان اوجا (Ulmus carpinifolia Borkh.) بومی ایران در دو منطقة گرگان و کمیجان (استان مرکزی) مورد بررسی و مقایسه قرار گرفتند. نتایج نشان دادند که درختان این دو رویشگاه در عین پیروی از ویژگیهای کلی و بارز آناتومی چوب جنس نارون، دارای مشخصههای منحصربه فردی نیز میباشند که برخی از آنها مانند وجود ضخامت مارپیچی ظریف در برخی آوندهای چوب بهاره نمونههای کمیجان و اشعههای جوشخورده در نمونههای گرگان برای نخستین بار است که در مورد این گونه گزارش میشود. علاوه بر این، نمونههای کمیجان دارای حلقههای رویشی نازکتری بوده و در آوندهای این نمونهها تیل دیده میشد درحالیکه این ویژگی در نمونههای گرگان وجود نداشت. تعدادی از اختلافات مشاهده شده بین ویژگیهای آناتومی چوب درختان این دو منطقه – بخصوص ویژگیهای مرتبط با آوندها- به اقلیم خشک و سردتر رویشگاه کمیجان نسبت داده شد ولی تفسیر دیگر تمایزها نیاز به پژوهشهای مستقل دیگری دارد. | ||
کلیدواژهها | ||
آناتومی چوب؛ اقلیم؛ اوجا؛ کمیجان؛ گرگان؛ نارون | ||
عنوان مقاله [English] | ||
Comparing the Wood Anatomy of the Field Elms (Ulmus carpinifolia Borkh.) Native to Gorgan and Komijan | ||
نویسندگان [English] | ||
Reza Oladi1؛ Hamed Matini Behzad2؛ Zahra Sharifi2؛ Abbas Masoumi2 | ||
1Assistant Prof., Faculty of natural resources, University of Tehran, I.R. Iran | ||
2Msc. Student, Faculty of natural resources, University of Tehran, I.R. Iran | ||
چکیده [English] | ||
Studying and comparing the wood anatomy and fiber morphology of the Field Elm trees that grow in different sites, along with assisting us in the identification and grouping of the Ulmus spp. will help us understand the reaction of these species to different climatic factors. In this study, some wood anatomical characteristics and fiber morphology of Gorgan and Komijan native Field Elms (Ulmus carpinifolia Borkh.) were investigated. The results showed that although these trees exhibit some outlined features of Ulmus spp. they also have unique properties (i.e. delicate spiral thickening in the earlywood vessels of Komijan or fused rays in Gorgan samples) which have not been reported for these species so far. Moreover, the Komijan samples had pronounced narrower tree rings and tyloses in the vessels while this feature was almost absent in Gorgan samples. Some of these differences – especially vessel related features- were linked to the colder and drier climate of Komijan but in order to have a better understanding of the other observed dissimilarities, more studies need to be conducted. | ||
کلیدواژهها [English] | ||
Climate, field elm, Gorgan, Komijan, Ulmus, Wood anatomy | ||
مراجع | ||
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