Effects of dasheen mosaic virus and a large bacilliform particle on the anatomy and ultrastructure of Colocasia esculenta (L.) Schott (Araceae)
Taro, Colocasia esculenta (L.) Schott (Araceae) is a monocot grown as a starchy root crop in much of the tropics and subtropics. It is subject to a number of fungal, bacterial, and viral diseases. Viral diseases have inhibited the cultivation of taro in parts of New Guinea and the Solomon Islands where taro is an integral part of the culture. Two different viruses, a Rhabdovirus, the Large Bacilliform Particle (LBP), and a smaller bacilliform virus, are the cause. Dasheen Mosaic Virus, a Potyvirus, has been found wherever taro is cultivated and produces a leaf mottle but is not lethal to plants.Colocasia esculenta cv K268 corms, infected with virus, were obtained from Michael Pearson, Department of Botany, University of Papua New Guinea, Port Moresby, New Guinea. Upon planting some of the corms produced leaves with virus symptoms. Others were symptomless but symptoms could be induced by stress.