ArticleThe Plant cell2001
Sucrose export defective1 encodes a novel protein implicated in chloroplast-to-nucleus signaling.
Article in The Plant cell, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.
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Who cites it
47 citing papers in PubMed, 133 citations in OpenAlex.
- Genomic insights into historical improvement of heterotic groups during modern hybrid maize breeding.Nature plants · 2022Article
- Plant Cell-Cell Transport via Plasmodesmata Is Regulated by Light and the Circadian Clock.Plant physiology · 2019Article
- Beyond pathways: genetic dissection of tocopherol content in maize kernels by combining linkage and association analyses.Plant biotechnology journal · 2018Article
- Maize Carbohydrate partitioning defective1 impacts carbohydrate distribution, callose accumulation, and phloem function.Journal of experimental botany · 2018Article
- Recent Advances in our Understanding of Tocopherol Biosynthesis in Plants: An Overview of Key Genes, Functions, and Breeding of Vitamin E Improved Crops.Antioxidants (Basel, Switzerland) · 2017Review
- Chlorophyllide-a-Oxygenase (CAO) deficiency affects the levels of singlet oxygen and formation of plasmodesmata in leaves and shoot apical meristems of barley.Plant signaling & behavior · 2017Article
- Tocopherol deficiency reduces sucrose export from salt-stressed potato leaves independently of oxidative stress and symplastic obstruction by callose.Journal of experimental botany · 2015Article
- Chloroplast signaling within, between and beyond cells.Frontiers in plant science · 2015Review
- Phenotypic analyses of rice lse2 and lse3 mutants that exhibit hyperaccumulation of starch in the leaf blades.Rice (New York, N.Y.) · 2014Article
- Expression of γ-tocopherol methyltransferase in chloroplasts results in massive proliferation of the inner envelope membrane and decreases susceptibility to salt and metal-induced oxidative stresses by reducing reactive oxygen species.Plant biotechnology journal · 2014Article
- Role of callose synthases in transfer cell wall development in tocopherol deficient Arabidopsis mutants.Frontiers in plant science · 2014Article
- Plasmodesmata dynamics are coordinated by intracellular signaling pathways.Current opinion in plant biology · 2013Review
- Increased expression of a phloem membrane protein encoded by NHL26 alters phloem export and sugar partitioning in Arabidopsis.The Plant cell · 2013Article
- Minor loading vein acclimation for three Arabidopsis thaliana ecotypes in response to growth under different temperature and light regimes.Frontiers in plant science · 2013Article
- Defining the core proteome of the chloroplast envelope membranes.Frontiers in plant science · 2013Article
- Tie-dyed2 encodes a callose synthase that functions in vein development and affects symplastic trafficking within the phloem of maize leaves.Plant physiology · 2012Article
- Plasmodesmata formation and cell-to-cell transport are reduced in decreased size exclusion limit 1 during embryogenesis in Arabidopsis.Proceedings of the National Academy of Sciences of the United States of America · 2012Article
- Redox states of plastids and mitochondria differentially regulate intercellular transport via plasmodesmata.Plant physiology · 2012Article
- Genome-wide association studies identified three independent polymorphisms associated with α-tocopherol content in maize kernels.PloS one · 2012Article
- Inheritance of deficient tocopherol accumulation in sunflower seeds.Journal of genetics · 2011Article
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Sucrose export defective1 (Sxd1) gene of maize was cloned and shown to encode a novel protein conserved between plants and cyanobacteria. The structure of the Sxd1 locus was determined in wild-type plants and two independent sxd1 alleles. Expression analysis demonstrated that the gene was transcribed in all green tissues, with highest levels in maturing leaf blades. In situ hybridization studies revealed high levels of Sxd1 mRNA in bundle sheath cells, with lower levels within the mesophyll. The SXD1 protein was localized to chloroplasts, in both bundle sheath and mesophyll cells. Levels of sucrose, glucose, and fructose were compared between wild-type and sxd1 plants. Mutant plants were fully capable of producing sucrose and accumulated all three sugars at concentrations above those measured in wild-type plants. Despite these increased sugar concentrations, photosynthetic gene expression was not significantly downregulated in affected areas of sxd1 leaf blades. These results are consistent with photosynthate being trapped within anthocyanin-accumulating regions of sxd1 leaves due to plasmodesmal occlusion at the bundle sheath-vascular parenchyma boundary of the minor veins. A model for SXD1 function is proposed in which the protein is involved in a chloroplast-to-nucleus signaling pathway necessary for proper late-stage differentiation of maize bundle sheath cells, including the developmentally regulated modification of plasmodesmata.
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