نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زیست شناسی، دانشکده علوم زیستی، دانشگاه آزاد واحد تهران شمال، تهران، ایران
2 گروه زیست شناسی،دانشکده علوم زیستی، دانشگاه آزاد واحد تهران شمال، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Zinc (Zn) is an essential micronutrient for higher plants that plays an important role in regulating the nitrogen metabolism, cell multiplication, protein synthesis, photosynthesis and auxin synthesis in plants and also a constituent of metalloenzyme or a cofactor for several enzymes but at high concentrations is toxic for plants. The present study investigates the anatomical and morphological parameters like shoot and petiole length, total leaf area and leaf numbers response of Capsicum annum L. under different concentrations (0 (control), 2.5, 5, 7.5, 10 and 15 mM) of zinc. Plants were grown in greenhouse under controlled conditions. Results indicated that increasing zinc concentrations caused significant decrease in stem and petiole length, leaf area and number of leaves (morphological parameters) compared to control plants (P ≤0.05). Also in anatomical studies we noticed several changes in cross section of leaf, stem and root. Certainly, zinc at high levels showed a negative effect on the overall growth of bell pepper plants.
کلیدواژهها [English]