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. 1996 Dec;134(4):601-614.
doi: 10.1111/j.1469-8137.1996.tb04925.x.

Phragmites die-back: sulphide- and acetic acid-induced bud and root death, lignifications, and blockages within aeration and vascular systems

J Armstrong  1 , F Afreen-Zobayed  1 , W Armstrong  1
Affiliations
Free article

Phragmites die-back: sulphide- and acetic acid-induced bud and root death, lignifications, and blockages within aeration and vascular systems

J Armstrong et al. New Phytol. 1996 Dec.
Free article

Abstract

Phragmites rhizome cuttings, and plantlets raised from seed, were exposed to the phytotoxins acetic acid or dissolved sulphide in unstirred solution cultures to determine whether die-back symptoms found in field-grown plants, and attributed to phytotoxin damage, could be induced. Many of the die-back symptoms associated with field sites, namely stunted adventitious roots and laterals, bud death, callus blockages of the gas-pathways, and vascular blockages, were all reproduced, and were particularly acute at the higher concentrations of the phytotoxins: acetic acid (1.67 mm), sulphide (1.4 mm). The results accord with the hypothesis that phytotoxins may play a critical role in Phragmites australis die-back.

Keywords: Phragmites; aerenchyma and vascular occlusions; callus and lignification; die-back; phytotoxins.

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References

    1. Allam AI, Hollis JP. 1972 Sulphide inhibition of oxidases in rice roots. Phytopathology 62: 634-639.
    1. Armstrong I. 1992 Pathways and mechanisms of aeration in Phragmites australis. Ph.D. thesis, University of Hull, UK .
    1. Armstrong I, Armstrong W. 1988 Phragmites australis-a preliminary study of soil oxidizing sites and internal gas transport pathways. New Phytologist 108: 373-382.
    1. Armstrong J, Armstrong W, Beckett PM. 1988 Phragmites australis a critical appraisal of the ventilating pressure concept and an analysis of resistance to pressurised gas-flow and gaseous diffusion in horizontal rhizomes. New Phytologist 110: 383-390.
    1. Armstrong J, Armstrong W, Beckett PM. 1992 Phragmites australis: Venturi- and humidity-induced convections, enhance rhizome aeration and rhizosphere oxidation. New Phytologist 120: 197-207.

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