Ultrastructural alterations in maize plants exhibiting different foliar symptoms of barley yellow dwarf virus
1990
Favali, M.A. (Universita degli Studi di Parma, Parma (Italy))
A strain of barley yellow dwarf virus from maize (Zea mays L.), M-BYDV, causes different maize genotypes to react with distinct foliar symptoms, either reddening or fine chlorotic irregular spotting. Rhopalosiphum padi (L.) was used as a vector to transmit M-BYDV to two maize inbred lines and one hybrid, as well as to Avena sativa L. Symptom expression was compared with enzyme linked immunosorbent assay (ELISA). Whatever the source of inoculum, the symptoms were constant with genotype. Samples from infected leaf and root tissues from both healthy and infected plants were observed with an electron microscope. In all infected lines a very high number of large starch granules were observed in the chloroplasts of the bundle sheath cells. Other ultrastructure alterations observed depended on cultivar.
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