An interesting paper about the rerelationship between plant virus and its vectors.
ABSTRACT
For many insect-vectored plant viruses, the relationship between feeding
behavior and vector competence may prove integral to understanding the
epidemiology of the resulting plant disease.
While plant-infecting
viruses are well known to change host plant physiology in a way that
makes them more attractive to vectors, viral manipulation of the vectors
themselves has only recently been reported.
Previous research
has suggested that the rapid spread of tomato yellow leaf curl virus
(TYLCV) throughout China has been facilitated by its primary vector, the
whitefly Bemisia tabaci.
We conducted two experiments testing the
impact of TYLCV infection of the host plant (tomato) and vector (B.
tabaci biotypes B and Q) on whitefly feeding behavior. Biotypes B and Q
both appeared to find TYLCV-infected plants more attractive, probing
them more quickly and having a greater number of feeding bouts; this did
not, however, alter the total time spent feeding. Viruliferous
whiteflies fed more readily than uninfected whiteflies, and spent more
time salivating into sieve tube elements.
Because vector salivation is
essential for viral transmission, this virally-mediated alteration of
behavior should provide TYLCV a direct fitness benefit. This is the
first report of such manipulation by a nonpropagative virus that belongs
to an exclusively plant-infecting family of viruses (Geminiviridae).
In
the context of previous research showing that feeding on TYLCV-infected
plants harms biotype B but helps biotype Q, the fact that both biotypes
were equally affected by TYLCV also suggests that the virus may alter
the B-Q competitive interaction in favor of biotype Q.
原文：http://jvi.asm.org/content/early/2013/02/06/JVI.03571-12.abstract
1 comment:
Post a Comment