Genotypic differences in cadmium transport in developing barley grains

Li Lin, Fei Chen, Yue Cai, Zhong-Hua Chen, Fangbin Cao

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Genotypic differences in cadmium (Cd) transport in developing grains of barley (Hordeum vulgare L.) were investigated using detached ears cultured in a nutrient solution containing 0.5 and 5 μM Cd. Cd concentration in each part of the ear in W6nk2 (a low-grain-Cd-accumulation genotype) was much less than in Zhenong8 (a high accumulator) with 0.5 μM Cd treatment. However, Cd concentration in W6nk2 grains increased with an increase in external Cd level and was similar to Zhenong8 with 5 μM Cd treatment. Awn removal, a high relative humidity (RH, 90%) and addition of sucrose markedly decreased grain Cd concentration in Zhenong8 but less affected Cd transport to grain in W6nk2. Stem girdling reduced Cd transport to developing grains with 5 μM Cd treatment, especially for W6nk2, whereas no effect was found in either genotype with low Cd treatment. Our results suggested that higher grain Cd in Zhenong8 is closely related to a larger capacity for xylem transport and is connected with Cd translocation in xylem and phloem sap.
Original languageEnglish
Pages (from-to)7009-7015
Number of pages7
JournalEnvironmental Science and Pollution Research
Volume24
Issue number8
DOIs
Publication statusPublished - 2017

Keywords

  • barley
  • cadmium
  • phloem
  • xylem

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