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اثر تنش خشکی بر ویژگیهای مورفوفیزیولوژیکی و بیوشیمیایی نهالهای ارغوان (.Cercis siliquastrum L) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| دوره 29، شماره 1 - شماره پیاپی 83، خرداد 1400، صفحه 91-100 اصل مقاله (254.26 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2021.353383.1981 | ||
| نویسندگان | ||
| زهرا سعیدی ابواسحقی1؛ بابک پیلهور* 2؛ سید وحید سیدنا3 | ||
| 1دانشجوی کارشناسی ارشد، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد، ایران | ||
| 2نویسنده مسئول، دانشیار، گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد، ایران | ||
| 3دانشآموخته دکتری جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد، ایران | ||
| چکیده | ||
| ارغوان (Cercis siliquastrum L.) بهعنوان یکی از گونههای مهم در ایجاد فضای سبز و جنگلکاری محسوب میشود. باتوجهبه ارزش بومشناختی و اقتصادی این گونه، آگاهی از نیاز آبی و مقاومت آن در برابر خشکی، ضروری است. پژوهش پیشرو با هدف بررسی تأثیر تنش خشکی بر ویژگیهای مورفوفیزیولوژیکی و بیوشیمیایی نهال ارغوان در قالب طرح کامل تصادفی با چهار سطح تنش خشکی شامل ظرفیت زراعی 100 (شاهد)، 75 (تنش ملایم)، 50 (تنش متوسط) و 25 درصد (تنش شدید) در شرایط گلخانهای در دانشکده کشاورزی و منابع طبیعی دانشگاه لرستان انجام شد. براساس نتایج بهدستآمده، تنش خشکی شدید بهطور معنیداری سبب کاهش در ویژگیهای ارتفاع نهال، سطح برگ و محتوای نسبی آب برگ بهترتیب بهمقدار 3/63، 7/77 و 6/62 درصد و افزایش در طول ریشه، نشت الکترولیت و غلظت مالوندیآلدئید بهترتیب بهمقدار 1/42، 6/63 و 5/334 درصد در مقایسه با گیاهان شاهد شد. با تشدید تنش خشکی تا 25 درصد ظرفیت زراعی، فعالیت آنزیمهای کاتالاز، پراکسیداز و آسکورباتپراکسیداز بهترتیب 862، 9/553 و 6/349 درصد افزایش یافت. این سطح از تنش سبب کاهش 55 درصدی در زندهمانی نهالها شد. باتوجهبه ارزیابی ویژگیهای مورد بررسی میتوان گفت که ارغوان، تنش خشکی تا 75 درصد ظرفیت زراعی را بدون آسیب تحمل میکند، اما کاهش آب تا حدآستانه 25 درصد ظرفیت زراعی سبب اختلال شدید در رشد و عملکرد آن میشود. | ||
| کلیدواژهها | ||
| ارتفاع نهال؛ پراکسیداز؛ کاتالاز؛ محتوای نسبی آب برگ؛ نشت الکترولیت | ||
| عنوان مقاله [English] | ||
| Effect of drought stress on morphophysiological and biochemical traits of purple (Cercis siliquastrum L.) seedlings | ||
| نویسندگان [English] | ||
| Z. Saeidi abueshaghi1؛ B. Pilehvar2؛ S.V. Sayedena3 | ||
| 1M.Sc. Student, Department of Forestry, Faculty of Agriculture and Natural Resources, Lorestan University, Khorramabad, Iran | ||
| 2*- Corresponding author, Associate Prof., Department of Forestry, Faculty of Agriculture and Natural Resources, Lorestan University, Khorramabad, Iran | ||
| 3Ph.D. of Forestry, Faculty of Agriculture and Natural Resources, Lorestan University, Khorramabad, Iran | ||
| چکیده [English] | ||
| Purple (Cercis siliquastrum L.) is one of the most important species in landscaping and afforestation. Due to both ecological and economical values, knowledge on the water needs and resistance of purple to different levels of drought stress is essential. Therefore, an experiment in a completely randomized design with four levels of drought stress including field capacity 100% (control), 75% (mild stress), 50% (medium stress) and 25% (severe stress) was performed in greenhouse conditions to study the effect of drought stress on morpho-physiological and biochemical traits of purple seedlings. Results showed that severe drought stress decreased seedling height, leaf area, relative leaf water content (63.3, 77.7 and 62.6%, respectively) and increased electrolyte leakage and malondialdehyde concentration (63.6 and 334.5%, respectively) compared with plants in the control treatment. Drought stress level of 25% of field capacity increased root length by 42.1%. In addition, activity of catalase, peroxidase and ascorbate peroxidase enzymes (862, 553.9 and 349.6%, respectively) increased with increasing drought. The results also showed that only the level of drought stress of 25% of field capacity reduced the survival of seedlings by 55%. Therefore, this species was concluded to be able to withstand water stress up to 75% of field capacity without causing damage, while its growth and yield will be severely affected if the amount of water is reduced to the threshold of 25% of field capacity. | ||
| کلیدواژهها [English] | ||
| Catalase, electrolyte leakage, peroxidase, relative leaf water content, seedling height | ||
| مراجع | ||
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