ArticlePhotosynthesis research2007
Alterations in photosynthesis in Arabidopsis lacking IMMUTANS, a chloroplast terminal oxidase.
Article in Photosynthesis research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 24 citations in OpenAlex.
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- Temporal Control of Seed Development in Dicots: Molecular Bases, Ecological Impact and Possible Evolutionary Ramifications.International journal of molecular sciences · 2021Review
- Leaf patterning of Clivia miniata var. variegata is associated with differential DNA methylation.Plant cell reports · 2016Article
- Article
- Leaf senescence induced by EGY1 defection was partially restored by glucose in Arabidopsis thaliana.Botanical studies · 2015Article
- gigantea suppresses immutans variegation by interactions with cytokinin and gibberellin signaling pathways.Plant physiology · 2014Article
- The Mechanism of Variegation in immutans Provides Insight into Chloroplast Biogenesis.Frontiers in plant science · 2012Article
- Interplay between non-photochemical plastoquinone reduction and re-oxidation in pre-illuminated Chlamydomonas reinhardtii: a chlorophyll fluorescence study.Photosynthesis research · 2011Article
- PDS activity acts as a rheostat of retrograde signaling during early chloroplast biogenesis.Plant signaling & behavior · 2010Article
- Comparative transcriptome analysis of green/white variegated sectors in Arabidopsis yellow variegated2: responses to oxidative and other stresses in white sectors.Journal of experimental botany · 2010Article
- Chloroplast photooxidation-induced transcriptome reprogramming in Arabidopsis immutans white leaf sectors.Plant physiology · 2009Article
- Subunits of the plastid ClpPR protease complex have differential contributions to embryogenesis, plastid biogenesis, and plant development in Arabidopsis.The Plant cell · 2009Article
- Dual role of the plastid terminal oxidase in tomato.Plant physiology · 2007Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Green and white variegation in the Arabidopsis immutans (im) mutant is caused by a nuclear recessive gene. The green sectors contain cells with normal-appearing chloroplasts, while cells in the white sectors have photooxidized plastids lacking organized lamellae. In the present experiments, we found that the green im sectors have enhanced rates of carbon assimilation (monitored by (14)CO(2) uptake) and that there are corresponding increases in the activities of Rubisco and SPS, elevated starch and sucrose pool sizes, and an altered pattern of carbohydrate partitioning that favors sucrose over starch. We hypothesize that these increases are due, at least in part, to interactions with white sectors, perhaps to compensate for reductions in total source tissue. Consistent with this idea, the im white sectors accumulate low levels of sucrose and acid invertase activities are markedly increased in the white versus green cells. This suggests that there is a sucrose gradient between the green and white sectors, and that sucrose is transported from the green to white cells in response to sink demand. The expression of photosynthetic genes is not appreciably altered in the green im sectors versus wild type, but rather there is an up-regulation of genes involved in defense against oxidative stress and down-regulation of genes involved in cell wall biosynthesis. We postulate that changes in photosynthesis in the im green cells are driven by a need for photoprotection (especially early in chloroplast biogenesis) and due to source-sink interactions.
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