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Variations in xanthophyll composition in etiolated seedlings of Arabidopsis thaliana correlate with protochlorophyllide accumulation

100%

Myśliwa-Kurdziel B. , Jemioła-Rzemińska M. , Turek E. , Strzałka K. , Malec P.

tom 59

nr 1

57-60

Protochlorophyllide (Pchlide) accumulation and xantophyll composition were studied in 5-day old etiolated seedlings of three ecotypes of Arabidopsis thaliana: Columbia (Col-0), Landsberg erecta (Ler) and Wassiliewska (Ws). The total Pchlide level as measured by fluorescence spectroscopy varied significantly between ecotypes. A rapid HPLC method revealed quantitative differences in carotenoid composition. It was found that in the Ler ecotype any enhanced accumulation of Pchlide correlates with an increased level of lutein, suggesting the role of enzymes involved in lutein synthesis in cross-regulation between chlorophyll and carotenoid biosynthetic pathways. The function of the dark-accumulated carotenoid pool in seedling de-etiolation is discussed.

Protection of native chlorophyll[ide] forms and of photosystem II against photodamage during early stages of chloroplast differentiation

75%

Franck F. , Schoefs B. , Barthelemy X. , Mysliwska-Kurdziel B. , Strzalka K. , Popovic R.

Acta Physiologiae Plantarum

1995

tom 17

nr 2