Welcome to Chinese Journal of Ecology! Today is Share:

cje ›› 2010, Vol. 29 ›› Issue (04): 821-825.

• Articles • Previous Articles     Next Articles

Physiological and biochemical responses of different rice cultivars to cadmium stress in tropical region of China.

LI Fu-yan1,2, LI Xu-ming3, ZHAO Xiong1,2, YANG Fan1,2, ZHANG Yu1,2, QI Zhi-ping2   

  1. 1Hainan University, Danzhou 571737, Hainan, China|2Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, Hainan, China|3Information Center Department of Land Environment and Resources, Haikou 570203, China
  • Online:2010-04-09 Published:2010-04-09

PDF (PC)

800

Abstract: Taking the main rice cultivars Boyou 225 and Ainuo (glutinous rice) in tropical region of China as test objects, a pot experiment was conducted to study their tolerance to three levels of soil cadmium (Cd) stress. Under the stresses of Cd, the Cd accumulation in the cultivars was in order of root > stem > rice husk > kernel. With the increasing concentration of soil Cd, cell membrane was more damaged, and the membrane permeability was slightly higher for Ainuo than for Boyou 225. The increase of soil Cd concentration increased the leaf malondialdehyde (MDA) and proline contents and SOD and POD activities, with the increment being obviously higher for Boyou 225 than for Ainuo, and decreased the catalase (CAT) activity. These results suggested that under the same Cd stress, Boyou 225 suffered Cd poison more severely than Ainuo.

Key words: Corn residues, Nitrogen transformation, Soil microbial nitrogen, Nitric nitrogen, 15N tracer