ArticleJournal of experimental botany2013
Galacturonosyltransferase 4 silencing alters pectin composition and carbon partitioning in tomato.
Article in Journal of experimental botany, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 40 citations in OpenAlex.
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- Transcriptome Analysis of Salt-Sensitive and Tolerant Genotypes Reveals Salt-Tolerance Metabolic Pathways in Sugar Beet.International journal of molecular sciences · 2019Article
- Downregulation of pectin biosynthesis geneCommunications biology · 2019Article
- Identification of quantitative trait loci and candidate genes for primary metabolite content in strawberry fruit.Horticulture research · 2019Article
- Regional Heritability Mapping Provides Insights into Dry Matter Content in African White and Yellow Cassava Populations.The plant genome · 2018Article
- Sugar release and growth of biofuel crops are improved by downregulation of pectin biosynthesis.Nature biotechnology · 2018Article
- Metabolic Profiling and Post-harvest Behavior of "Dottato" Fig (Frontiers in plant science · 2018Article
- Rice Sucrose Partitioning Mediated by a Putative Pectin Methyltransferase and Homogalacturonan Methylesterification.Plant physiology · 2017Article
- A genetic genomics-expression approach reveals components of the molecular mechanisms beyond the cell wall that underlie peach fruit woolliness due to cold storage.Plant molecular biology · 2016Article
- Knockdown of a laccase in Populus deltoides confers altered cell wall chemistry and increased sugar release.Plant biotechnology journal · 2016Article
- Identification and mode of inheritance of quantitative trait loci for secondary metabolite abundance in tomato.The Plant cell · 2015Article
- Antioxidant activity and comparative RNA-seq analysis support mitigating effects of an algae-based biostimulant on drought stress in tomato plants.Physiologia plantarumArticle
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Authors and funding
14 authors at 5 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pectin is a main component of the plant cell wall and is the most complex family of polysaccharides in nature. Its composition is essential for the normal growth and morphology pattern, as demonstrated by pectin-defective mutant phenotypes. Besides this basic role in plant physiology, in tomato, pectin structure contributes to very important quality traits such as fruit firmness. Sixty-seven different enzymatic activities have been suggested to be required for pectin biosynthesis, but only a few genes have been identified and studied so far. This study characterized the tomato galacturonosyltransferase (GAUT) family and performed a detailed functional study of the GAUT4 gene. The tomato genome harbours all genes orthologous to those described previously in Arabidopsis thaliana, and a transcriptional profile revealed that the GAUT4 gene was expressed at higher levels in developing organs. GAUT4-silenced tomato plants exhibited an increment in vegetative biomass associated with palisade parenchyma enlargement. Silenced fruits showed an altered pectin composition and accumulated less starch along with a reduced amount of pectin, which coincided with an increase in firmness. Moreover, the harvest index was dramatically reduced as a consequence of the reduction in the fruit weight and number. Altogether, these results suggest that, beyond its role in pectin biosynthesis, GAUT4 interferes with carbon metabolism, partitioning, and allocation. Hence, this cell-wall-related gene seems to be key in determining plant growth and fruit production in tomato.
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