Effect of temperature on cucumber mosaic virus satellite-induced lethal tomato necrosis is helper virus strain dependent

1995 ◽  
Vol 140 (1) ◽  
pp. 65-74 ◽  
Author(s):  
J. M. Kaper ◽  
L. M. Geletka ◽  
G. S. Wu ◽  
M. E. Tousignant
2011 ◽  
Vol 92 (8) ◽  
pp. 1930-1938 ◽  
Author(s):  
Mónica Betancourt ◽  
Aurora Fraile ◽  
Fernando García-Arenal

Two groups of Cucumber mosaic virus (CMV) satellite RNAs (satRNAs), necrogenic and non-necrogenic, can be differentiated according to the symptoms they cause in tomato plants, a host in which they also differ in fitness. In most other CMV hosts these CMV-satRNA cause similar symptoms. Here, we analyse whether they differ in traits determining their relative fitness in melon plants, in which the two groups of CMV-satRNAs cause similar symptoms. For this, ten necrogenic and ten non-necrogenic field satRNA genotypes were assayed with Fny-CMV as a helper virus. Neither type of CMV-satRNA modified Fny-CMV symptoms, and both types increased Fny-CMV virulence similarly, as measured by decreases in plant biomass and lifespan. Necrogenic and non-necrogenic satRNAs differed in their ability to multiply in melon tissues; necrogenic satRNAs accumulated to higher levels both in single infection and in competition with non-necrogenic satRNAs. Indeed, multiplication of some non-necrogenic satRNAs was undetectable. Transmission between hosts by aphids was less efficient for necrogenic satRNAs as a consequence of a more severe reduction of CMV accumulation in leaves. The effect of CMV accumulation on aphid transmission was not compensated for by differences in satRNA encapsidation efficiency or transmissibility to CMV progeny. Thus, necrogenic and non-necrogenic satRNAs differ in their relative fitness in melon, and trade-offs are apparent between the within-host and between-host components of satRNA fitness. Hence, CMV-satRNAs could have different evolutionary dynamics in CMV host-plant species in which they do not differ in pathogenicity.


Gene ◽  
1990 ◽  
Vol 89 (2) ◽  
pp. 296
Author(s):  
Takahiko Hayakawa ◽  
Makoto Mizukami ◽  
Ikuo Nakumura ◽  
Masahiko Suzuki

Virology ◽  
2009 ◽  
Vol 389 (1-2) ◽  
pp. 59-65 ◽  
Author(s):  
Minoru Takeshita ◽  
Yuka Matsuo ◽  
Masashi Suzuki ◽  
Naruto Furuya ◽  
Kenichi Tsuchiya ◽  
...  

1995 ◽  
Vol 140 (10) ◽  
pp. 1841-1847 ◽  
Author(s):  
Y. -H. Hsu ◽  
C. -W. Wu ◽  
B. -Y. Lin ◽  
H. -Y. Chen ◽  
M. -F. Lee ◽  
...  

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