Am. Parente et al., MYCOPLASMA-LIKE ORGANISMS ASSOCIATED WITH PHLOEM CELLS OF DISEASED GRAPEVINES IN NORTHERN PORTUGAL, Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 101(2), 1994, pp. 124-127
The symptoms of a disease which affects some vineyards in northern Por
tugal include yellowing and rolling down of the leaves, premature leaf
abscission, dark spots in the stems as well as vegetative decline. A
preliminary electron microscope study revealed the presence of pleomor
phic bodies resembling mycoplasma-like organisms (MLOs) in the phloem
tissue of the petiole of diseased plants.