Pigment Synthesis and Photosynthetic Activity in Carotenoid Deficient Mutants of Maize

Faludi-Dániel, Ágnes

doi:10.1007/978-94-010-1936-1_22

Cited by 1 publication

(2 citation statements)

References 12 publications

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“…Therefore, the simplest interpretation of our results is that steric hindrance provoked by capsanthin changes the normal architecture of the thylakoid membranes. This conclusion is consistent with the severe disorganization of thylakoid membranes in mutant maize accumulating lycopene (Faludi-Daniel et al, 1968) or ζcarotene (Faludi-Daniel, 1975) and is reinforced by the fact that carotenoid structures affect photosynthetic membrane shaping in prokaryotes . Pigmentprotein analysis revealed that capsanthin is essentially integrated into PSII complexes rather than PSI.…”

Section: Preferential Integration Of Non-native Carotenoids Into Photsupporting

confidence: 81%

“…In a more general context, significant accumulation of acyclic carotenoids in plant chloroplasts has been described following inhibitor treatments (Seyama and Splittstoesser, 1975) and mutations (Faludi-Daniel, 1975;Faludi-Daniel et al, 1968). However, these changes are lethal due to pleiotropic effects associated with premature inhibition of the carotenogenic pathway.…”

Section: Introductionmentioning

confidence: 99%

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Functional integration of non‐native carotenoids into chloroplasts by viral‐derived expression of capsanthin–capsorubin synthase in Nicotiana benthamiana

et al. 1998

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SummaryThe biosynthesis of leaf carotenoids in Nicotiana benthamiana was altered by forced re-routing of the pathway to the synthesis of capsanthin, a non-native chromoplastspecific xanthophyll, using an RNA viral vector containing capsanthin-capsorubin synthase (Ccs) cDNA. The cDNA encoding Ccs was placed under the transcriptional control of a tobamovirus subgenomic promoter. Leaves from transfected plants expressing Ccs developed an orange phenotype and accumulated high levels of capsanthin (up to 36% of total carotenoids). This phenomenon was associated with thylakoid membrane distortion and reduction of grana stacking. In contrast to the situation prevailing in chromoplasts, capsanthin was not esterified and its increased level was balanced by a concomitant decrease of the major leaf xanthophylls, suggesting an autoregulatory control of chloroplast carotenoid composition. Capsanthin was exclusively recruited into the trimeric and monomeric light-harvesting complexes of photosystem II (PSII) and shown to significantly contribute to the lightharvesting capacity. On a chlorophyll basis, the concentrations of PSI and PSII reaction centres were not modified. This demonstration that higher plant antenna complexes can accommodate non-native carotenoids provides compelling evidence for functional remodelling of photosynthetic membranes toward a better photoreactivity by rational design of the incorporated carotenoid structures.

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Section: Preferential Integration Of Non-native Carotenoids Into Photsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Functional integration of non‐native carotenoids into chloroplasts by viral‐derived expression of capsanthin–capsorubin synthase in Nicotiana benthamiana

et al. 1998

View full text Add to dashboard Cite

show abstract

Pigment Synthesis and Photosynthetic Activity in Carotenoid Deficient Mutants of Maize

Cited by 1 publication

References 12 publications

Functional integration of non‐native carotenoids into chloroplasts by viral‐derived expression of capsanthin–capsorubin synthase in Nicotiana benthamiana

Functional integration of non‐native carotenoids into chloroplasts by viral‐derived expression of capsanthin–capsorubin synthase in Nicotiana benthamiana

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