title: [Photosynthetic pigments of tomato under conditions of biotic stress and effects of furostanol glycosides].
abstract: Adaptogenic effect of furostanol glycosides (FG) on biosynthesis of photosynthetic pigments in tomato plants (Lycopersicon esculentum Mill.) were studied under conditions of biotic stress caused by root-knot nematode (Meloidogyne incognita Kofoid et White). Treatment of plants with 5 x 10(-4) M FG was accompanied by an increase in the rate of biosynthesis of pigments (particularly, chlorophyll b and carotenoids), which was observed against the background of a decrease in the relative contribution of beta-carotene and an increase in the relative contribution of pigments of violaxanthin cycle (VXC) to the overall pool of carotenoids. It was suggested that FG stimulated phytoimmunity by shifting metabolism of carotenoids toward enhanced biosynthesis of VXC pigments. These pigments play a protective role and facilitate stabilization of photosynthetic apparatus, which is particularly important under stress conditions.
authors.affiliation: Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071 Russia. isvas@inbi.ras.ru
authors.forename: I S
authors.initials: IS
authors.lastname: Vasil'eva
authors.forename: S A
authors.initials: SA
authors.lastname: Vaniushkin
authors.forename: S V
authors.initials: SV
authors.lastname: Zinov'eva
authors.forename: Zh V
authors.initials: ZhV
authors.lastname: Udalova
authors.forename: Iu V
authors.initials: IuV
authors.lastname: Bolychevtseva
authors.forename: V A
authors.initials: VA
authors.lastname: Paseshnichenko
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000096:biosynthesis*; D002734:Chlorophyll / Q000096:biosynthesis; D006027:Glycosides / Q000494:pharmacology*; D018551:Solanum lycopersicum / Q000187:drug effects / Q000378:metabolism* / Q000469:parasitology; D010788:Photosynthesis / Q000187:drug effects; D010860:Pigments, Biological / Q000096:biosynthesis*; D013261:Sterols / Q000494:pharmacology*; D014431:Tylenchoidea; D024341:Xanthophylls; D019207:beta Carotene / Q000031:analogs & derivatives* / Q000378:metabolism
chemical_list: D006027:Glycosides; D010860:Pigments, Biological; D013261:Sterols; D024341:Xanthophylls; D019207:beta Carotene; D002734:Chlorophyll; D002338:Carotenoids; C005613:violaxanthin; C037184:chlorophyll b; C041827:furostanol I