اثرات متقابل پتاسیم و ژیبرلین بر میزان کلروفیل و کاروتنوئیدهای کلروپلاست و پارامترهای رشد در گیاه عدس (Lens culinaris L.)
محورهای موضوعی : ژنتیکگیتی برزین 1 , رمضانعلی خاوری نژاد 2 , حمید فهیمی 3 , سارا سعادتمند 4
1 - دانشجوی دکتری دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
2 - گروه زیست شناسی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
3 - گروه زیست شناسی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
4 - گروه زیست شناسی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران
کلید واژه: عدس, پتاسیم, پارامترهای رشد, اسید ژیبرلیک, رنگیزه های کلروپلاستی, ژیبرلین,
چکیده مقاله :
اثر پتاسیم (K) با غلظتهای 5، 10، 15و20 میلی مولار و ژیبرلین (GA3) با غلظتهای 05/0 و 1/0 میلی مولار بطور جداگانه و با هم بر برخی از فرایندهای فیزیولوژیک مانند سنجش مقدار کلروفیل های برگ با استفاده از روش Arnon و سنجش مقدار کاروتنوئیدهای برگ با استفاده از روش Davies و پارامترهای رشد به روش Rodrigues در گیاه عدس (Lens culinaris L.) مورد بررسی قرار گرفت. نتایج نشان داد که مقادیر کلروفیل a و کلروفیل کل و کاروتنوئیدها با افزایش غلظتهای K و GA3 بصورت جداگانه به طور معنیداری افزایش یافت، ولی بر مقدار کلروفیل b تاثیر معنیداری ایجاد نکرد. همچنین پارامترهای رشد سرعت رشد نسبی (RGR) و میزان همگون سازی خالص (NAR) با افزایش K و GA3 افزایش معنیداری را نشان دادند. غلظتهای مختلف K و GA3 بر میزان رنگیزههای کلروپلاستی و پارامترهای رشد افزایش معنیداری نداشت.
In this study, we evaluated the effects of potassium (5, 10, 15, and 20mM KCl) and gibberellin (0.05 and 0.1mM), either alone or in combination, on the amount of carotenoids and chlorophyll a & b and also on the plant growth parameters including NAR and RGR on 37–day plants of lentil. It showed that the amount of above mentioned pigments was affected by various levels of either potassium or gibberellin alone. In addition, all of the plant growth parameters increased significantly by each of the evaluated levels of potassium and GA3. However, the combination of K and GA3 did not have any additive effect either on the pigment content or on the plant growth parameters. We concluded that the addition of potassium and gibberellin to a growing lentil might increase the amount of carotenoid and chlorophyll and enhanced the plant growth.
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