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Alteration in growth, leaf gas exchange, and photosynthetic pigments of maize plants under combined cadmium and arsenic stress

Citation

Anjum, SA and Tanveer, M and Hussain, S and Ashraf, U and Khan, I and Wang, L, Alteration in growth, leaf gas exchange, and photosynthetic pigments of maize plants under combined cadmium and arsenic stress, Water, Air and Soil Pollution, 228, (1) Article 13. ISSN 0049-6979 (2017) [Refereed Article]

Copyright Statement

Copyright 2016 Springer International Publishing Switzerland

DOI: doi:10.1007/s11270-016-3187-2

Abstract

Increasing soil contamination by heavy metals is a major threat to environmental safety and global food security. The present study examined the influence of Cd and As stresses on morpho-physiological growth and yield of two contrasting maize cultivars (Run Nong 35 and Dong Dan 80). The Cd (100 μM) and As (200 μM) were applied individually as well as in combination (Cd + As) at 30 DAS. A control without Cd or As stress was also maintained for comparison. Application of Cd and As alone or in combination substantially reduced the growth (plant height, number of leaves per plant, leaf area, stem diameter, and shoot fresh and dry weight) and yield (number of ears per plant, number of kernels per ear, and 100-kernel weight) contributing traits in both maize cultivars particularly in Run Nong 35. Furthermore, pronounced reductions in gas exchange attributes (photosynthesis, stomatal conductance, transpiration rate, and intercellular CO2) and chlorophyll contents were observed in metal-stressed plants. The combined application of Cd and As was more detrimental for maize, and this treatment recorded the maximum reductions in morpho-physiological growth and yield of both cultivars. Cultivar variations were also apparent, and Dong Dan 80 performed better than Run Nong 35 for all the studied attributes. The higher tolerance of Dong Dan 80 was associated with better leaf gas exchange and maintenance of chlorophyll contents in this cultivar under Cd and As stress.

Item Details

Item Type:Refereed Article
Keywords:arsenic, cadmium, gas exchange, maize cultivars, photosynthesis
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Biological Sciences
Author:Tanveer, M (Mr Mohsin Tanveer)
ID Code:126992
Year Published:2017
Web of Science® Times Cited:5
Deposited By:TIA - Research Institute
Deposited On:2018-07-06
Last Modified:2018-08-16
Downloads:0

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