Plant and Soil

, Volume 258, Issue 1, pp 241–248

Effects of aluminum and cadmium toxicity on growth and antioxidant enzyme activities of two barley genotypes with different Al resistance

  • Tianrong Guo
  • Guoping Zhang
  • Meixue Zhou
  • Feibo Wu
  • Jinxin Chen
Article

DOI: 10.1023/B:PLSO.0000016554.87519.d6

Cite this article as:
Guo, T., Zhang, G., Zhou, M. et al. Plant and Soil (2004) 258: 241. doi:10.1023/B:PLSO.0000016554.87519.d6

Abstract

A hydroponic experiment was carried out to study genotypic differences in effect of Al and Cd on growth and antioxidant enzyme activities by using 2 two-row winter barley genotypes (Hordeum vulgare L.) with different Al resistance, the relatively resistant Gebeina and the sensitive Shang 70–119. The seedling growth, presented as shoot height, root length and dry weight of root and shoot, and tillers per plant were inhibited by all stress treatments, including low pH, 100 μM Al (pH 4.0) and 1.0 μM Cd+100 μM Al (pH 4.0), while 1.0 μM Cd showed a slight stimulation of growth. The inhibition was more severe in 1.0 μM Cd +100 μM Al (pH 4.0) than in 100 μM Al (pH 4.0), indicating that the effect of Cd and Al is synergistic. Al-sensitive genotype Shang 70–119 was more inhibited than Al-resistant genotype Gebeina. Proline concentration in leaves was significantly increased when plants were exposed to all stress treatments, being more pronounced in Shang 70–119 than in Gebeina. A highly significant increase in malonaldehyde (MDA) concentration, and a stimulation of superoxide dismutase (SOD) and peroxidase (POD) activities were recorded in the plants subjected to low pH, 100 μM Al (pH 4.0) and 1.0 μM Cd +100 μM Al(pH 4.0) treatments, and the extent of the increase varied greatly depending on concentration and time of exposure. Shang 70–119 had a higher MDA concentration, and less increase in SOD activity when first exposed than Gebeina had.

aluminum anti-oxidative enzyme barley (Hordeum vulgare L.) cadmium 

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Tianrong Guo
    • 1
  • Guoping Zhang
    • 1
  • Meixue Zhou
    • 2
  • Feibo Wu
    • 1
  • Jinxin Chen
    • 1
  1. 1.Agronomy Department, Huajia Chi CampusZhejiang UniversityHangzhouChina
  2. 2.Tasmanian Institute of Agricultural ResearchUniversity of TasmanianKinds Meadows TasmanianAustralia

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