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Year 2009, Volume: 3 Issue: 3, 39 - 46, 01.11.2009

Abstract

Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods

Year 2009, Volume: 3 Issue: 3, 39 - 46, 01.11.2009

Abstract

In this study, chlorophyll, antioxidant compounds and antioxidant enzyme activities of five crop plants (Lycopersicum esculentum Miller, Solanum melanogena L., Capsicum annuum L., Lactuca sativa L. and Cucumis sativus L.) were analyzed in leaves at different development phases (sink, source and senescent). Leaf dry weight decreased, while relative water content increased in all species except C. sativus, depending on leaf development level. Chlorophyll amount significantly decreased with senescence, while carotenoids were found to be well preserved during senescence. It was found that ascorbic acid and tocopherol contents and antioxidant enzyme activities decreased in senescent leaves when compared to young sink and mature source leaves. High GR activities of sink leaves decreased at source and senescent phases. GR activity was preserved in L. esculentum and C. sativus during the senescent phase. It was found that high SOD activity of sink leaves was significantly preserved in source and senescent laves. The findings indicate that young sink leaves need antioxidant protection and after the elimination of this need in the senescent phase, the antioxidant capacity of leaves decreased. We suggest that the relationship between antioxidant defense system and developmental phases show significant variations according to plant species

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Details

Other ID JA74CE22YZ
Journal Section Research Article
Authors

Yüksel Keleş This is me

Publication Date November 1, 2009
Published in Issue Year 2009 Volume: 3 Issue: 3

Cite

APA Keleş, Y. (2009). Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods. Journal of Applied Biological Sciences, 3(3), 39-46.
AMA Keleş Y. Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods. J.appl.biol.sci. November 2009;3(3):39-46.
Chicago Keleş, Yüksel. “Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods”. Journal of Applied Biological Sciences 3, no. 3 (November 2009): 39-46.
EndNote Keleş Y (November 1, 2009) Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods. Journal of Applied Biological Sciences 3 3 39–46.
IEEE Y. Keleş, “Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods”, J.appl.biol.sci., vol. 3, no. 3, pp. 39–46, 2009.
ISNAD Keleş, Yüksel. “Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods”. Journal of Applied Biological Sciences 3/3 (November 2009), 39-46.
JAMA Keleş Y. Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods. J.appl.biol.sci. 2009;3:39–46.
MLA Keleş, Yüksel. “Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods”. Journal of Applied Biological Sciences, vol. 3, no. 3, 2009, pp. 39-46.
Vancouver Keleş Y. Changes in Antioxidant Defense Capacity in Crop Plants Depend on Leaf Developmental Periods. J.appl.biol.sci. 2009;3(3):39-46.