The coat protein gene of tobamovirus P 0 pathotype is a determinant for activation of temperature-insensitive L 1a-gene-mediated resistance in Capsicum plants.
Tobamovirus resistance in Capsicum plants, which is mediated by L genes (L(1), L(2), L(3) or L(4)), is known to be temperature sensitive. However, the L(1a ) gene, a newly identified tobamovirus resistance gene that is mapped to the L locus, confers temperature-insensitive resistance against the tobamovirus P(0) pathotype. To identify the viral elicitor that activates the L(1a )-gene-mediated resistance, several chimeric viral genomes were constructed between tobacco mosaic virus-L (P(0) pathotype), paprika mild mottle virus-J (P(1 )pathotype) and pepper mild mottle virus-J (P(1,2) pathotype). Infection patterns of these chimeric viruses in L(1a )-harboring plants revealed that the L(1a )-gene-mediated resistance was activated by the CP of a particular pathotype of tobamovirus, like other L-gene-mediated resistances, but the L(1a )-gene-mediated resistance differs from those conferred by other L genes in terms of temperature sensitivity.
Matsumoto
Katsutoshi
K
Laboratory of Plant Pathology and Biotechnology, Kochi University, Nankoku, Kochi, 783-8502, Japan.
Sawada
Hiromasa
H
Matsumoto
Kouhei
K
Hamada
Hiroyuki
H
Yoshimoto
Eri
E
Ito
Takao
T
Takeuchi
Shigeharu
S
Tsuda
Shinya
S
Suzuki
Kazumi
K
Kobayashi
Kappei
K
Kiba
Akinori
A
Okuno
Tetsuro
T
Hikichi
Yasufumi
Y
D002212:Capsicum / Q000235:genetics / Q000821:virology*; D036022:Capsid Proteins / Q000235:genetics*; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D010935:Plant Diseases / Q000821:virology*; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D013696:Temperature; D017898:Tobamovirus / Q000235:genetics / Q000472:pathogenicity*
D036022:Capsid Proteins; D010940:Plant Proteins; D011994:Recombinant Proteins