Fusiform rust gall formation and cellulose, lignin, and other wood constituents of Loblolly Pine. Fusiform rust gall and canker formation and phenols of Loblolly Pine. Fusiform rust gall formation and cytokinin of Loblolly Vine
Phytopathology 60(8): 1216-1220; 1221-1224; 1225-1226
ISSN/ISBN: 0031-949X Accession: 014491159
These studies at Univ. Ga have been briefly noticed . a. The sp. gr. of gall (Cronartium fusiforme) wood on Pinus taeda was max. at the point where the infection originated, due to an accumulation of substances extract-able in neutral solvents. Gallwood resembled summerwood in the higher lignin content and the monosaccharide composition of holocellulose. b. Increasing diam., age and sp. gr. in galls were accompanied by increases in heartwood area and heartwood phenols, occurring as water-conducting tissue decreased. The phenols in water-extracted w-butanol fractions in gallwood differed quantitatively and qualitatively from those in noninfected wood but differences in the orthodihydroxy and heartwood phenols were only quantitative. c. The increase in cytokinin activity suggested that cytokinin-like compounds play an important role in fusiform gall formation.