Regulation of Tobamovirus Gene Expression

Movement and subcellular localization of a tobamovirus in Arabidopsis

“…CP of some tobamoviruses has been occasionally found seed-transmissible in the chloroplasts of the infected host cells (Dawson and Lehto, 1990;Gibbs, 1986). Here, we used polyclonal antiViral movement into the floral organs is of special interest because of the possible seed transmission of the virus.…”

“…lular space following cell damage. How plant viruses, which unlike their animal counterparts do not bud out of the Within the infected cells, viral CP is often found in chloroplasts (Dawson and Lehto, 1990;Gibbs, 1986), preinfected host cells, reach the intercellular space in unclear.…”

Compromising early salicylic acid accumulation delays the hypersensitive response and increases viral dispersal during lesion establishment in TMV‐infected tobacco

“…Indeed lesion sizes have been correlated with levels of the 30 kDa'movement-protein' (MP) (Dawson and Lehto, 1990;Deem etal,, 1991). Though, MP is not directly involved in the elicitation of HR in N-gene tobacco varieties (Deem et al,, 1991) which appears to involve recognition of the replicase complex (Padgett and Beachy, 1993), a link between MP-levels and levels of replication (Dawson and Lehto, 1990) has been demonstrated. Interestingly, there is recent data that SA effects TMV replication in compatible interactions (Chivasa et al, 1997).…”

Subgenomic RNAs of bamboo mosaic potexvirus-V isolate are packaged into virions.

“…However, for virions with rod-shaped morphology, subgenomic RNAs of alphaviruses are generally found to be inefficiently encapsidated (Maia et al, 1996). In the case of tobacco mosaic virus, the subgenomic RNAs are encapsidated in certain strains depending on the position of the packaging signal (Dawson & Lehto, 1990). Few subgenomic RNAs of potexviruses are encapsidated (Maia et al, 1996) since the packaging signal of potexviruses is located at the 5h end of the genomic RNA, a region that is not transcribed into subgenomic RNAs (Sit et al, 1994).…”