African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Full Length Research Paper

Pathogenesis mechanism of Pestalotiopsis funerea toxin (Pf-toxin) on the plasmalemma of needle cells of different pine species

  Shujiang Li1, Tianhui Zhu1* Hanmingyue Zhu2, Shan Han1, Fanglian Li1, Wei Yang1and Hua Yang1  
  1College of Forestry, Sichuan Agricultural University, Ya’an, Sichuan, China. 2Department of Foreign Affairs Administration, Chengdu Institute, Sichuan International Studies University, Chengdu, China.
Email: [email protected], [email protected]

  •  Accepted: 14 March 2012
  •  Published: 10 April 2012

Abstract

 

The Pf-toxin (C5H11O5N) has been genetically associated with the pathogenesis mechanism in plasmalemma cells of pine needles in previous reports. In this study, a toxin was obtained from Pestalotiopsis funerea (called Pf- toxin) by concentrating and column chromatography. Responses of the needles of eight pine species against the toxin were investigated. The O2- production rate, malondialdehyde (MDA) content, fatty acid composition, relative conductivity, and lesion length of the needles were determined. The severest damage and lipid peroxidation were exhibited by the needle plasmalemma of Pinus massoniana, Pinus yunnanensis, and Pinus tabuliformis.Pinus elliottii and Pinus taeda followed. Pinus armandi, Pinus radiata and Pinus thunbergii came last. The resistance capability of resistant species against the Pf-toxin precedes that of susceptible species.

 

Key words: Pestalotiopsis funerea, Pestalotia needle blight, Pinus, resistance.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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