the occurrence of differently coloured areas on leaves or petals due to virus infection (streaks, spots, mottles), mineral deficiency (veinal or interveinal chlorosis), genetically determined patterns as in leaves of Coleus cultivars, chimerical structure (light-coloured borders on leaves), a transposon (transposable element), rohelistel taimedel korrapäratult paigutunud mitmesuguse värvitugevusega tume- kuni helerohelised laigud, kloroplastide ebaühtlase jaotumise tagajärg