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Wound‐induced vascular occlusions in tissues of the reed Phragmites australis : their development and chemical nature
Author(s) -
Soukup Aleš,
Votrubová Olga
Publication year - 2005
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2005.01434.x
Subject(s) - phragmites , polysaccharide , vascular tissue , matrix (chemical analysis) , chemistry , tissue remodeling , extracellular matrix , biophysics , botany , biology , anatomy , microbiology and biotechnology , biochemistry , inflammation , ecology , chromatography , wetland , immunology
Summary• This work focuses on the development of vascular occlusions, which are gels resealing the wounded vascular systems of injured organs, in the common reed Phragmites australis . Their formation seems to be crucial in keeping the internal environment of the plant stable. • Histochemical tests, combined with an extraction series, were used to follow changes in the chemical nature of gels during their development. • It was found that the first gel material was secreted by living cells in the vicinity of the incision within 1 or 2 d after wounding. • Early gels were colourless and mainly composed of acidic polysaccharides interlinked by Ca 2+ bridges. The properties of the gel material gradually changed during maturation. The matrix of polysaccharides in the early gels was later modified and interlinked by other components, resulting in a highly resistant material. Structural proteins were identified as the principal interlocking components of the material, and were responsible for its high resistance.