What is Tulip breaking virus?
{{Virusbox | image = TBVtulip.jpg | image_alt = | image_caption = | parent = Potyvirus | species = Tulip breaking virus | synonyms = | synonyms_ref = | subdivision_ranks = [[Strain (biology)|Strains]] | subdivision = *mild tulip breaking virus (MTBV) *severe tulip breaking virus (STBV) }} '''''Tulip breaking virus''''' is one of five [[plant]] viruses that cause both [[tulip]]s and [[lily|lilies]] to have a different [[petal]] color effect, such as stripes or flames on an otherwise single color flower. ''Tulip breaking virus'' is in the same virus group as ''Tulip top-breaking virus (TTBV), Tulip bandbreaking virus (TBBV), Rembrandt tulip-breaking virus (ReTBV)'' and ''Lily mottle virus (LMoV)'' but they are all considered different viruses. ''Tulip breaking virus'' can come in two forms: Severe tulip breaking virus and mild tulip breaking virus. Severe tulip breaking virus can cause light colors to appear on tulips, whereas mild tulip breaking virus tends to cause darker colors to appear. == Effects of the virus == ''Tulip breaking virus'' infects the bulb of the tulip or lily and changes the color of the petals. This change depends on the strain of the virus, the type of plant and the age of the plant when it gets infected. ''Tulip breaking virus'' causes differences in the pigments in the flowers, which in turn changes the colors. In lilies, it takes two weeks after infection to see a change in petal color and then changes the shape of the leaves and flowers. In all forms, the virus harms the bulb and makes it more difficult for the plant to sprout again year after year. Eventually, the bulb is unable to flower again, which is why rare color broken bulbs from the past are no longer in existence. == History == ''Tulip breaking virus'' used to be considered the earliest recorded virus, but now it is considered the second earliest, virus-induced leaf chlorosis being the first in 752 AD. <ref>{{Cite journal|last=Brunt|first=Alan; Walsh, John|year=2005|title='Broken' tulips and Tulip breaking virus|url=|j