Distribution of Accumulated Aluminum and Changes in Cell Wall Polysaccharides inEucalyptus camaldulensisandMelaleuca cajuputiunder Aluminum Stress

Autor:	Nguyen Tran Nguyen, Pravat K. Mohapatra, Kounosuke Fujita, Mark J. Dudzinski
Rok vydání:	2005
Předmět:	chemistry.chemical_classification food.ingredient Melaleuca cajuputi Callose food and beverages Soil Science Context (language use) Plant Science Polysaccharide Cell wall chemistry.chemical_compound food Eucalyptus camaldulensis chemistry Dry weight Botany Hemicellulose
Zdroj:	Soil Science and Plant Nutrition. 51:737-740
ISSN:	1747-0765 0038-0768
DOI:	10.1111/j.1747-0765.2005.tb00103.x
Popis:	Distribution of aluminum (Al) within plant components and Al-induced changes in cell wall polysaccharides in root tips of Eucalyptus camaldulensis Dehnh. seedlings were compared with those of Melaleuca cajuputi Powell. In E. camaldulensis, 0.5 mM Al (pH 4.2 for 40 d) reduced plant dry weight by 50%, increased callose concentration in the root tips and induced leaf necrosis. In comparison with M. cajuputi, Al concentrations were higher in roots and leaves of E. camaldulensis on both a fresh weight basis and in the cell sap, but were lower in the cell wall. Al increased pectin, hemicellulose and cellulose concentration in the cell walls of E. camaldulensis root tips. Al-induced leaf necrosis and growth reduction in E. camaldulensis is discussed in the context of potentially toxic concentrations of Al in plant tissue and changes in polysaccharide content which could reduce water and nutrient uptake and cell wall extensibility in roots.
Databáze:	OpenAIRE
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