New Zealand Journal of Crop and Horticultural Science abstracts
Effects of two naturally occurring mild potyviruses on the symptom expression
of vanilla necrosis potyvirus in Vanilla fragrans
M. N. PEARSON
S. KESHAW
D. GUPTA
School of Biological Sciences
The University of Auckland
Private Bag 92 019
Auckland, New Zealand
email: m.pearson@auckland.ac.nz
Abstract Two mild potyviruses isolated from
Vanilla
fragrans in Tonga were evaluated for their ability to protect
V.
fragrans against the severe effects of vanilla necrosis potyvirus (VNV).
Plants infected with the mild strain were multiplied
in vitro and after
establishment in pots in the glasshouse were challenged with VNV. The symptoms
of V1 and V3 infection of
V. fragrans are described and the effects of
V1, V3, and VNV on the growth of
V. fragrans quantified. Both mild
strains moderated the effects of VNV, demonstrating the general potential for
using
in vitro produced mild strain protected plants for the control of
VNV. However, these particular strains also reduced plant growth in the absence
of VNV.
Keywords vanilla; virus; mild strain; cross protection;
Tonga
H99007
Received 5 February 1999; accepted 14 October 1999
Short communication
PDF file of entire paper: medium quality (1017K); (scanned from paper original: notes about this process)
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