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اثر تنش خشکی بر صفات مورفولوژیک، میزان پرولین و درصد تیمول در آویشن (Thymus vulgaris L.) | ||
| تحقیقات گیاهان دارویی و معطر ایران | ||
| مقاله 11، دوره 26، شماره 2 - شماره پیاپی 48، مرداد 1389، صفحه 239-251 اصل مقاله (251.83 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijmapr.2010.6939 | ||
| نویسندگان | ||
| کیوان بابایی1؛ مجید امینی دهقی* 2؛ سید علی‌محمد مدرس ثانوی3؛ رضا جباری1 | ||
| 1دانشجوی کارشناسی ارشد رشته زراعت، دانشکده کشاورزی، دانشگاه شاهد | ||
| 2دانشکده کشاورزی و مرکز تحقیقات گیاهان دارویی، دانشگاه شاهد | ||
| 3استاد، دانشکده کشاورزی، دانشگاه تربیت مدرس | ||
| چکیده | ||
| تنش کمبود آب به‌طور دائم یا موقت، در رشد و توزیع پوشش طبیعی گیاهان و در عملیات کشت، بیشتر از عوامل محیطی محدودکننده است. آویشن (Thymus vulgaris L.) از مهمترین گیاهان خانواده نعناع است و مصارف دارویی دارد. به منظور بررسی اثر تنش خشکی بر رشد، عملکرد و انباشت متابولیتهای سازگاری (پرولین) و مواد مؤثره آویشن (تیمول)، آزمایشی در شرایط کنترل شده گلخانه در قالب بلوک کامل تصادفی با چهار تیمار و چهار تکرار در سال 1385 انجام شد. سطوح مختلف تنش خشکی شامل شرایط 100% ظرفیت مزرعه‌ای (شاهد یا بدون تنش)، 85% ظرفیت مزرعه‌ای (تنش ملایم)، 70% ظرفیت مزرعه‌ای (تنش متوسط)، 55% ظرفیت مزرعه‌ای (تنش شدید) بود. نتایج تجزیه‌های آماری نشان داد که تنش خشکی اثر معنی‌داری بر پارامترهای رشدی، عملکرد اندام رویشی و انباشت پرولین و درصد تیمول داشت. با افزایش تنش خشکی ارتفاع بوته، تعداد ساقه جانبی، وزن خشک و وزن تر اندام رویشی، حجم ریشه، وزن تر و خشک ریشه و طول ریشه کاهش نشان داد. درصد تیمول و میزان پرولین افزایش یافت. (در 55% ظرفیت مزرعه‌ای (تنش شدید) میزان پرولین و درصد تیمول افزایش یافتند). البته عملکرد مورفولوژیک با متابولیتهای ثانویه پرولین و تیمول رابطه عکس را با تغییرات تنش خشکی نشان داد. | ||
| کلیدواژه‌ها | ||
| آویشن (Thymus vulgaris L.)؛ پرولین؛ تیمول؛ رشد؛ تنش خشکی | ||
| عنوان مقاله [English] | ||
| Water deficit effect on morphology, prolin content and thymol percentage of Thyme (Thymus vulgaris L.) | ||
| نویسندگان [English] | ||
| K. Babaee1؛ M. Amini Dehaghi2؛ S.A.M. Modares Sanavi3؛ R. Jabbari1 | ||
| 1MSc Student, Department of agronomy and plant breeding, Agricultural College, University of Shahed, Tehran, Iran | ||
| 2Department of agronomy and medicinal plants research center, Agricultural College, University of Shahed, Tehran, Iran | ||
| 3Department of agronomy, Agricultural College, University of Tarbiat modares, Tehran, Iran | ||
| چکیده [English] | ||
| Water deficit stress, permanent or temporary, limits the growth and the distribution of natural vegetation and the performance of cultivated plants more than any other environmental factors. Mechanism involved is still not clear. Thyme (Thymus vulgaris L.) is an important medicinal plant in perfume and medical industry. In this research, the effects of water deficit stress on growth, yield, metabolites compatible (prolin) and oil composition of thyme (thymol) were studied. Complete randomized block design with 4 treatments and 4 replications have been used in 2006. Water deficit levels included control (100% field capacity), mild stress (85% field capacity), medium stress (70% field capacity) and severe stress (55% field capacity). The statistical analysis showed that water deficit had significant effect on growth parameters, yield biomass, prolin and thymol. Water stress decreased plant height, number of secondary branches, dry and fresh weight growth and root mass, dry and fresh weight root and length root. In addition, thymol percentage and prolin content increased with severe stress (55% field capacity). Morphological yield with secondary metabolites prolin and thymol were obversed with water deficit changes. | ||
| کلیدواژه‌ها [English] | ||
| Thyme (Thymus vulgaris L.), prolin, Thymol, Growth, Water deficit stress | ||
| مراجع | ||
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