Diversity among mycoplasma-like organisms inducing grapevine yellows in France.
A survey of grapevine samples collected in different viticultural areas in France was undertaken, using a PCR method with primers allowing amplification of a part of the 16S rRNA gene of most MLOs, and restriction analyses of the amplified products. The presence of MLOs was established in all the different grapevine samples, and their diversity was demonstrated. The typical pattern yielded by flavescence dorée sensu stricto-MLO was found in samples from southern vineyards, including a symptomless rootstock. Two different patterns were found in samples affected by bois noir disease of northern French vineyards, one of these patterns being previously undescribed.