Showing 4 results for Maize
Volume 8, Issue 2 (10-2009)
Abstract
Maize seedlings were treated with various concentrations of copper (25-100 µM) without EDTA and with EDTA for 120 hours. A sever and progressive decrease of root length and dry weight and an increase in K+ leakage with increasing Cu in nutrient solution was observed in the treated plants with Cu without EDTA. The roots accumulated significantly higher amounts of Cu than the shoot. With increasing Cu concentrations, amounts of Ca, Mg, K and Fe decreased in roots and in shoot. Application of EDTA with Cu caused increased dry weight and root length but decreased K+ leakage into nutrient solution. Application of EDTA increased Cu accumulation in roots but decreased it in shoot and caused a different effect on other minerals contents. Overall, EDTA could reduce copper toxicity in Maize seedlings.
Volume 9, Issue 3 (10-2010)
Abstract
Maize (Zea mays L.) plants grown in hydroponic culture were treated with 50 &thinsp&mum CdCl2. Growth and metabolic parameters indicative of oxidative stress and antioxidant responses were studied in leaves and roots of plants. Apart from increasing lipid peroxidation, death cells and H2O2 accumulation, supply of Cd suppressed growth, fresh and dry mass of plants. The activities of catalase (CAT), ascorbate peroxidase, guaiacol peroxidase (GPX) and gutathione reductase (GR) however increased in plants supplied with 50&thinsp&mumCd. Therefore, it can be concluded that a supply of 50&thinsp&mumCd induced oxidative stress by increasing production of ROS despite increased antioxidant protection in maize plants.
,
Volume 10, Issue 4 (2-2011)
Abstract
Maize (Zea mays L) plants grown in hydroponic culture were treated with 0, 50 and 100&thinsp&mumCdCl2. Growth parameters and some biochemical changes were studied in roots and shoots of plants. The results showed that with increasing Cd concentration, root weight, pigment contents (chlorophyll a and b and total carotenoids), reduction of dichlorophenol indophenol, nitrate content and nitrate reductase activity were decreased, while free amino acide, non-protein thiols, endogenous H2O2 and malondealdyde as indicator lipid of peroxidation were increased.
Latifeh Pourakbar, ,
Volume 13, Issue 1 (5-2013)
Abstract
Copper and nickel are an essential micronutrient for plants, playing an important role in maintaining plants' natural metabolism and growth, but in excess both heavy metal are also a proven inhibitor of various physiological functions. In this study maize (Zea mays L.) plants grown in hydroponic culture were treated with CuSO4 (0, and 100 &mum),NiSO4 (0,100 and 200&mum)and interaction of CuSO4 (100 &mum)and NiSO4 (100 and 200 &mum). After 1 mounth of treatment, growth parameters and some biochemical changes were studied in roots and shoots of plants. The results showed that with increasing Cu and Ni concentration, pigment contents (chlorophyll a, b and total carotenoids), root and shoot length and dry weight were decreased, while k+ leakage, malondealdyde as indicator lipid of peroxidation and some antioxidant enzyme activity were increased. Also result showed that interaction of Cu and Ni has been cooperation effects on together and intensify each other's work
