Effects of cadmium on the growth and physiological characteristics of sorghum plants

  • L Da-lin
  • H Kai-qi
  • M Jing-jing
  • Q Wei-wei
  • W Xiu-ping
  • Z Shu-pan
Keywords: Cadmium, sorghum plants, physiological characteristics.

Abstract

The effects of cadmium (Cd) stress on the growth and physiological characteristics were studied in 3 sorghum species viz., sweet sorghum [Sorghum bicolor (L.) Moench. cv. Hunnigreen], sorghum hybrid sudangrass (Sorghum bicolor × Sorghum sudanense, cv. Everlush) and sudangrass [Sorghum sudanense (Piper) Stapf cv. Xinjiang]. The results show that low concentration of Cd2+ improved the growth of sorghum plants, but high concentrations of Cd2+ (50 mg kg−1 and 100 mg kg−1) significantly depressed the growth of sorghum plants; Cd stress on chlorophyll synthesis positively correlated with the Cd2+ concentration; root activities negatively correlated with the concentration of Cd2+ at each growth stage; the malondialdehyde (MDA) contents increased under low concentration of Cd2+ (≤ 25 mg kg−1) treatment, but significantly decreased when the concentration of Cd2+ was more than 50 mg kg−1.

Key words: Cadmium, sorghum plants, physiological characteristics.

Published
2013-11-26
Section
Articles

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eISSN: 1684-5315