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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Physiol
2017 ; 8
(ä): 146
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Odor, Not Performance, Dictates Bemisia tabaci s Selection between Healthy and
Virus Infected Plants
#MMPMID28360861
Chen G
; Su Q
; Shi X
; Liu X
; Peng Z
; Zheng H
; Xie W
; Xu B
; Wang S
; Wu Q
; Zhou X
; Zhang Y
Front Physiol
2017[]; 8
(ä): 146
PMID28360861
show ga
Although, insect herbivores are generally thought to select hosts that favor the
fitness of their progeny, this "mother-knows-best" hypothesis may be challenged
by the presence of a plant virus. Our previous study showed that the whitefly,
Bemisia tabaci, the obligate vector for transmitting Tomato yellow leaf curl
virus (TYLCV), preferred to settle and oviposit on TYLCV-infected rather than
healthy host plant, Datura stramonium. The performances of B. tabaci larvae and
adults were indeed improved on virus-infected D. stramonium, which is consistent
with "mother-knows-best" hypothesis. In this study, B. tabaci Q displayed the
same preference to settle and oviposit on Tomato spotted wilt virus
(TSWV)-infected host plants, D. stramonium and Capsicum annuum, respectively. As
a non-vector of TSWV, however, insect performance was impaired since adult body
size, longevity, survival, and fecundity were reduced in TSWV infected D.
stramonium. This appears to be an odor-mediated behavior, as plant volatile
profiles are modified by viral infection. Infected plants have reduced quantities
of o-xylene and ?-pinene, and increased levels of phenol and 2-ethyl-1-hexanol in
their headspace. Subsequent behavior experiments showed that o-xylene and
?-pinene are repellant, while phenol and 2-ethyl-1-hexanol are attractive. This
indicates that the preference of B. tabaci for virus-infected plants is modulated
by the dynamic changes in the volatile profiles rather than the subsequent
performances on virus-infected plants.