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مطالعه رفتار روزنه ای دو رقم گل رز در شدت های مختلف نور | ||
| به زراعی کشاورزی | ||
| مقاله 1، دوره 17، شماره 1، اردیبهشت 1394، صفحه 1-11 اصل مقاله (625.67 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jci.2015.54777 | ||
| نویسندگان | ||
| منصوره حاتمیان1؛ مصطفی عرب* 2؛ محمودرضا روزبان2 | ||
| 1دانشجوی سابق کارشناسی ارشد، گروه باغبانی، پردیس ابوریحان دانشگاه تهران، پاکدشت، تهران، ایران | ||
| 2استادیار، گروه باغبانی، پردیس ابوریحان دانشگاه تهران، پاکدشت، تهران، ایران | ||
| چکیده | ||
| نور از مهم‌ترین عوامل محیطی تأثیرگذار بر بسیاری از جنبههای رشد و نمو گیاهان محسوب میشود. برگهای قرارگرفته در سایه و آفتاب به‌طور معمول تفاوتهایی در بسیاری ویژگیها از جمله رفتار روزنهای نشان میدهند. در این پژوهش، تأثیر شدتهای مختلف نور بر رفتار روزنهای دو رقم رز تحت شرایط گلخانهای بررسی شد. تیمارها شامل شدتهای نور 1200 (شاهد)، 640، 520 و 240 میکرومول بر متر مربع در ثانیه بودند که روی دو رقم تجاری رز (‘ردوان’ و ‘گلمیرا’) با استفاده از تورهای سبز رنگ اعمال شدند. براساس نتایج به‌دست‌آمده، طول و عرض روزنه در شدت نور 640 میکرومول بر متر مربع در ثانیه بیشترین بود و از این نظر، تفاوتی بین ارقام وجود نداشت. از نظر تراکم روزنه، تفاوت معناداری میان شدتهای مختلف نور مشاهده نشد، اما بین دو رقم رز از این نظر، اختلاف معناداری مشاهده شد، بهطوریکه رقم ‘گلمیرا’ تعداد روزنۀ بیشتری نسبت به رقم ‘ردوان’ داشت. اگرچه هدایت روزنهای تنها در بین دو رقم اختلاف معناداری در سطح 5 درصد نشان داد، مقایسۀ میانگین شدتهای مختلف نور تفاوت معناداری از این نظر نشان ندادند و تنها یک روند افزایشی با افزایش شدت نور بهدست آمد. | ||
| کلیدواژه‌ها | ||
| تراکم روزنه؛ سایه‌دهی؛ طول روزنه؛ عرض روزنه؛ هدایت روزنهای | ||
| عنوان مقاله [English] | ||
| Stomatal behavior of two rose cultivar under different light intensities | ||
| نویسندگان [English] | ||
| Mansoureh Hatamian1؛ Mostafa Arab2؛ Mahmoud Reza Roozban2 | ||
| 1Former M.Sc. Student, Department of Horticulture, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran | ||
| 2Assistant Professor, Department of Horticulture, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran | ||
| چکیده [English] | ||
| Light as an important environmental factor, influences many aspects of plant growth and development. Leaves are different in some characters including stomatal behavior under shade or light conditions. In this study, the effects of different levels of light intensity on stomatal behavior of two rose cultivars, ‘Gulmira’ and ‘Red One’, were evaluated under controlled conditions. To obtain different light intensities, green polyethylene nets were used. Treatments were light intensities of 1200 (Control), 640, 520 and 240 mmol/m2/s. Based on the results, the highest stomatal length and width were found in 640 mmol/m2/s in both cultivars. Regarding stomatal density, there were no significant differences among different levels of light intensities, although cultivar effect was significant. Therefore, stomatal density was higher in ‘Gulmira’ than ‘Red One’. Also, stomatal conductance was significant only between cultivars, and there was no significant difference among light treatments. However there was an increasing trend of stomatal conductance with increasing light intensities. | ||
| کلیدواژه‌ها [English] | ||
| Shading, Stomatal conductance, Stomatal density, Stomatal length, Stomatal width | ||
| مراجع | ||
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