بررسی اثر ارتفاع از سطح دریای رویشگاه بر ویژگی‌های روزنه و مجاری مترشحه برگ ون (Fraxinus excelsior L.)

نوع مقاله: علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد جنگل‌شناسی و اکولوژی جنگل، دانشگاه گیلان، صومعه‌سرا، ایران

2 دانشیار، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران

3 استاد، گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران

4 استادیار، ایستگاه تحقیقات کشاورزی و منابع طبیعی، گیلان، رشت، ایران

چکیده

این پژوهش به بررسی روزنه و مجاری مترشحه در برگ­های ون در سه طبقة ارتفاعی (500، 700 و 900 متر) در منطقة شفارود پرداخته است. ابتدا ده درخت با قطر 30-50 سانتی­متر انتخاب شده و سه برگ از هر درخت و در مجموع 90 برگ جمع­آوری شد. مراحل رنگ­بری و رنگ­آمیزی نمونه­ها انجام شد، سپس به­وسیلة میکروسکوپ نوری عکس­هایی با بزرگ­نمایی 10× و 40× از نمونه­ها تهیه شد. با به­کارگیری نرم­افزار Digimizer از روی تصاویر ویژگی­های مساحت، طول، عرض و تراکم روزنه و مجاری مترشحه در واحد سطح اندازه­گیری شده است. برای تجزیه‌وتحلیل داده­های به‌دست‌آمده از آزمون آنالیز واریانس یک­طرفه و آزمون دانت تری در سطح احتمال 95 درصد استفاده شد. نتایج نشان داد که طول و عرض و مساحت روزنه­ها و مجاری مترشحه بین مناطق ارتفاعی، دارای اختلاف معنی­داری است. مساحت و عرض روزنه با افزایش ارتفاع کاهش یافته است. مقدار مساحت، طول و عرض مجاری مترشحه در منطقة 900 متری بیشتر از دیگر مناطق است. با افزایش ارتفاع از سطح دریا مساحت روزنه­ کاهش و تراکم آن افزایش یافت که علت این تغییرات سازگاری با شرایط مختلف محیطی است.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of Altitude (above sea level) on stomata and Secretory duct Characteristics in leave of Fraxinus excelsior L.

نویسندگان [English]

  • Leila Hamidoost 1
  • Javad Torkaman 2
  • Teymour Rostami shahraji 3
  • Beitollah Amanzadeh 4
1 M.Sc. Forestry, Forestry Department, Faculty of Natural Resources, University of Guilan, Sowme`eh Sara, I. R. Iran
2 Associate Professor, Forestry Department, Faculty of Natural Resources, University of Guilan, Sowme`eh Sara, I. R. Iran
3 Professor, Forestry Department, Faculty of Natural Resources, University of Guilan, Sowme`eh Sara, I. R. Iran
4 Assistant Professor, Research Division of Natural Resources, Guilan Agricultural and Natural Resources Research Center, Guilan, I. R. Iran
چکیده [English]

This study is about stoma and Secretory duct in Ash leaves along an altitudinal gradient (500–700–900 m) in Shafaroud zone. First, 10 trees 30-50 cm D.B.H were selected and 3 leaves of each tree and 90 leaves were collected then leaves of Ash discolor and coloration stage and Some images (×10 and ×40) were prepared of them by light microscopy. The stoma and Secretory duct characteristics including area, length and width and density have been measured on the surface by Digimizer software. Kolmogorov-Smirnov and Levene test for testing normality and Homogeneity of Variances, one way ANOVA for analyzing data, Dunnetts T3 for comparing mean were used at (p=0.05). The results showed that length, width and area of stoma and resin duct have significant differences among the altitudinal zones. The area and width of stomata have decreased with an increasing altitude. The area, length and width of the Secretory duct in 900 m is more than other zones. The area of stomata decreased and the density of stomata increased with increasing elevation the cause of this variation is adapt to the environmental change.

کلیدواژه‌ها [English]

  • Altitudinal gradient
  • Fraxinus excelsior
  • Secretory duct
  • Shafaroud
  • Stoma
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