Lignin deposition induced by aluminum in wheat (Triticum aestivum) roots

Masao Sasaki, Yoko Yamamoto, Hideaki Matsumoto

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

We investigated the relation between the toxic effect of aluminum (Al) on root growth and the lignin deposition in wheat (Triticum aestivum L. cvs Atlas 66 and Scout 66). In the Al-tolerant cultivar Atlas 66, control treatment without AlCl3 at pH 4.75, cell length increased dramatically in the portion of the root that was 0.6 to 3.2 mm from the root cap junction (approximately 1.0 to 3.6 mm from the root tip). However, treatment with 20 μM AlCl3 for 24 and 48 h completely inhibited root elongation and markedly decreased the length and increased the diameter of the cells in the same portion of the root. Moreover, marked deposition of lignin was observed in the cells that corresponded to the portion 1.5 to 4.5 mm from the root tip in Atlas 66 roots treated with 20 μM AlCl3, while no deposition of lignin was detected in control roots. Treatment with 5 μM AlCl3 slightly inhibited root growth and there was no deposition of lignin in the root. On the other hand, in roots of the Al-sensitive cultivar Scout 66, treatment with 5 μM AlCl3 completely inhibited root growth and markedly induced deposition of lignin. These results suggest that lignification in the elongating region coincided with the extent of inhibition of root growth by Al in two wheat cultivars that differed in their sensitivity to Al.

Original languageEnglish
Pages (from-to)193-198
Number of pages6
JournalPhysiologia Plantarum
Volume96
Issue number2
DOIs
Publication statusPublished - Feb 1996

Keywords

  • Aluminum
  • Cell elongation
  • Lignin deposition
  • Root
  • Triticum aestivum
  • Wheat

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science
  • Cell Biology

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