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Effect of progressive drought stress on growth, leaf gas exchange, and antioxidant production in two maize cultivars

Citation

Anjum, SA and Tanveer, M and Ashraf, U and Hussain, S and Shahzad, B and Khan, I and Wang, L, Effect of progressive drought stress on growth, leaf gas exchange, and antioxidant production in two maize cultivars, Environmental Science and Pollution Research, 23, (17) pp. 17132-17141. ISSN 0944-1344 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Springer-Verlag Berlin Heidelberg

DOI: doi:10.1007/s11356-016-6894-8

Abstract

Drought stress is one of the major environmental factors responsible for reduction in crop productivity. In the present study, responses of two maize cultivars (Rung Nong 35 and Dong Dan 80) were examined to explicate the growth, yield, leaf gas exchange, leaf water contents, osmolyte accumulation, membrane lipid peroxidation, and antioxidant activity under progressive drought stress. Maize cultivars were subjected to varying field capacities (FC) viz., well-watered (80 % FC) and drought-stressed (35 % FC) at 45 days after sowing. The effects of drought stress were analyzed at 5, 10, 15, 20, ad 25 days after drought stress (DAS) imposition. Under prolonged drought stress, Rung Nong 35 exhibited higher reduction in growth and yield as compared to Dong Dan 80. Maize cultivar Dong Dan 80 showed higher leaf relative water content (RWC), free proline, and total carbohydrate accumulation than Run Nong 35. Malondialdehyde (MDA) and superoxide anion were increased with prolongation of drought stress, with higher rates in cultivar Run Nong 35 than cultivar Dong Dan 80. Higher production of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) and glutathione reductase (GR) resulted in improved growth and yield in Dong Dan 80. Overall, the cultivar Dong Dan 80 was better able to resist the detrimental effects of progressive drought stress as indicated by better growth and yield due to higher antioxidant enzymes, reduced lipid peroxidation, better accumulation of osmolytes, and maintenance of tissue water contents.

Item Details

Item Type:Refereed Article
Keywords:maize, progressive drought stress, photosynthesis, proline accumulation, yield
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other Plant Production and Plant Primary Products
Objective Field:Plant Production and Plant Primary Products not elsewhere classified
Author:Tanveer, M (Mr Mohsin Tanveer)
ID Code:117679
Year Published:2016
Web of Science® Times Cited:2
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2017-06-23
Last Modified:2017-08-23
Downloads:0

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