Study of Aluminum Toxicity on Photosynthetic Pigment, Soluble Sugars and Proline Contents in Two Sunflower Varieties
محورهای موضوعی : Research On Crop EcophysiologyNAJMEH ZIAEI 1 , ZAHRA REZAIATMAND 2 , MONIREH RANJBAR 3
1 - Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
2 - Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
3 - Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
کلید واژه: Chlorophyll, Proline, Sunflower, Carbohydrate, Keywords: Aluminum,
چکیده مقاله :
NAJMEH ZIAEI1, ZAHRA REZAIATMAND*1, MONIREH RANJBAR11- Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran*Correspondent author Email: rezayatmand@iaufala.ac.irReceived: 1 December 2013 Accepted: 11 April 2014ABSTRACT Abstract Aluminum is one of the most important heavy metals which not only can be easily absorbed by roots, but it also damages its normal function and blocks absorption of water and nutrients. According to this fact that sunflower has been widely used in industry, this study investigates the effects of aluminum toxicity on biochemical factors in two sunflower varieties including Sirena (tolerant) and Sanbero (sensitive). The study was carried out in a completely randomized design with aluminum (0, 100, 200, 300, 400, 700 µM) treatments and four replications in hydroponic culture. Experiments are conducted in establishment stage of the plant in four iterations at concentrations of 0, 100, 200, 300, 400, and 700 µm of aluminum. Results of biochemical tests show that aluminum, as a heavy metal, reduces the content of photosynthetic pigments and soluble sugars. In addition, it causes toxicity in sunflower plant. Increase in the proline content of two sunflower varieties show that varieties (Sirena and Sanbero) are more vigorous against oxidative stress with low concentrations of aluminum.
