Journal of Environmental Biology

Effects of Cd²⁺ ions on root anatomical structure

of four rice genotypes

Bing Li 1,Chang Quan-Wang 1*,Heng Liu 1, Huan-Xiu Li 2, Juan Yang 1, Wei-Ping Song 1, Lu Chen 1 and Min? Zeng1

1Department of Soil and Plant, College of Resources and Environment, Sichuan Agricultural University, Chengdu-611 130, China

2Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Ya'an 625 014, China

*Corresponding Author E-mail: w.changquan@163.com

Publication Data

Paper received:

7 January 2014

Revised received:

11 March 2014

Accepted:

14 March 2014

Abstract

Root anatomical structures of four rice breeding materials (maintainer linesYixiang B and E2B, restorer lines R892 and Mianhui725), grown under different Cd²⁺ levels, were observed and the root resistance to Cd²⁺ ions was evaluated. Under low Cd stress, the new roots appeared in the cortex of four rice genotypes. The diameter of the new root in YixiangB was larger than that of E2B. The restorer line R892 generated more roots than Mianhui725. Under high Cd²⁺ stress, broken epidermis, damaged cortex and black spots appeared in both maintainer and restorerlines. In general, anatomical damages in the restorer lines (R892 and Mianhui725) were slighter than those of the maintainer lines (YixiangB and E2B). Thus, the restorer lines had more adaptive ability to Cd²⁺ stress than maintainer lines. 

Key words

Accumulation type, Anatomical structure, Cadmium stress, Maintainer/restorer line rice

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