name one species of plant that is often attacked by the tobacco mosaic virus
Plant virus
Plant virus transmission from generation to generation occurs in about 20 % of plant viruses . When viruses are transmitted by seeds , the seed is infected in the generative cells and the virus is maintained in the germ cells and sometimes , but less often , in the seed coat . When the growth and development of plants is delayed because of situations like unfavourable weather , there is an increase in the amount of virus infections in seeds . There does not seem to be a correlation between the location of the seed on the plant and its chances of being infected . Little is known about the mechanisms involved in the transmission of plant viruses via seeds , although it is known that it is environmentally influenced and that seed transmission occurs because of a direct invasion of the embryo via the ovule or by an indirect route with an attack on the embryo mediated by infected gametes . These processes can occur concurrently or separately depending on the host plant . It is unknown how the virus is able to directly invade and cross the embryo and boundary between the parental and progeny generations in the ovule . Many plants species can be infected through seeds including but not limited to the families Leguminosae , Solanaceae , Compositae , Rosaceae , Cucurbitaceae , Gramineae . Bean common mosaic virus is transmitted through seeds .
Plant virus transmission from generation to generation occurs in about 20 % of plant viruses . When viruses are transmitted by seeds , the seed is infected in the generative cells and the virus is maintained in the germ cells and sometimes , but less often , in the seed coat . When the growth and development of plants is delayed because of situations like unfavourable weather , there is an increase in the amount of virus infections in seeds . There does not seem to be a correlation between the location of the seed on the plant and its chances of being infected . Little is known about the mechanisms involved in the transmission of plant viruses via seeds , although it is known that it is environmentally influenced and that seed transmission occurs because of a direct invasion of the embryo via the ovule or by an indirect route with an attack on the embryo mediated by infected gametes . These processes can occur concurrently or separately depending on the host plant . It is unknown how the virus is able to directly invade and cross the embryo and boundary between the parental and progeny generations in the ovule . Many plants species can be infected through seeds including but not limited to the families Leguminosae , Solanaceae , Compositae , Rosaceae , Cucurbitaceae , Gramineae . Bean common mosaic virus is transmitted through seeds .