부산대학교 도서관

Plants are frequently infected with cytoplasmic RNA viruses that persist for many generations through nearly 100% vertical transmission without producing any symptoms. Movement between plant cells and horizontal transmission has not been observed in these viruses; instead they are distributed to all host cells through host cell division. Jalapeño peppers (Capsicum annuum) are all infected with Pepper cryptic virus 1 (PCV 1, family Partitiviridae). We compared the effect of odor cues from PCV 1 infected (J+) and virus free (J-) Jalapeño pepper on the aphid Myzus periscae, a common vector of acute plant viruses. Pairwise preference experiments showed a stark contrast to insect-plant interactions in acute virus infections: virus infected plants deterred aphids. The acute plant virus Cucumber mosaic virus (CMV) manipulates its host's volatile emission to attract aphid vectors and facilitate its transmission. We inoculated J+ and J- with CMV. Volatiles of J+ and J- CMV infected plants were more attractive to aphids than J+ and J-mock inoculated plants. However, in pairwise preference between J+ CMV- and J- CMV-infected plants, aphids preferred the J- CMV volatile blend. Aphid reproduction on J+ and J- plants was measured as an indicator for the effect of PCV 1 on host quality for aphids. Aphid reproduction on J+ plants was more than two fold lower than on J- plants. [ABSTRACT FROM AUTHOR]