Tocopherol Accumulation and Temporal Expression Analysis of VTE1 and VTE5 Gene Family in Fruit of Two Contrasting Avocado Genotypes

Tocopherol Accumulation and Temporal Expression Analysis of VTE1 and VTE5 Gene Family in Fruit of Two Contrasting Avocado Genotypes

α -tocopherol is found in high concentrations in avocado fruit mesocarp, however, its accumulation and genetic control during maturation and ripening has not been elucidated. Based in the relevance of VTE1 and VTE5 genes in tocopherol biosynthesis and aiming to determine the association between toco...

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Bibliographic Details
Published in:Plant foods for human nutrition (Dordrecht) Vol. 77; no. 2; pp. 265 - 270
Main Authors: Valdez-Agramón, Rosalva C., Valdez-Morales, Maribel, López-Meyer, Melina, Sandoval-Castro, Eduardo, Calderón-Vázquez, Carlos L.
Format: Journal Article
Language:English
Published: New York Springer US 01-06-2022
Springer Nature B.V
Subjects:
Accumulation
Biosynthesis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Developmental stages
Ecology
Flowering
Food Science
Fruits
Gene expression
Genes
Genetic control
Genomes
Genotypes
Nutrition
Original Paper
Plant Physiology
Ripening
Tocopherol
Avocado
Phytol kinase
Tocopherol cyclase
Tocopherol
α-Tocopherol
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Summary:α -tocopherol is found in high concentrations in avocado fruit mesocarp, however, its accumulation and genetic control during maturation and ripening has not been elucidated. Based in the relevance of VTE1 and VTE5 genes in tocopherol biosynthesis and aiming to determine the association between tocopherol accumulation and expression of tocopherol biosynthetic genes, gene expression of VTE1 and VTE5 were evaluated through the time during three developmental stages: before harvest at 100, 160 and 220 days after flowering (DAF) and after harvest (220 DAF + 5) in two contrasting avocado genotypes (San Miguel and AVO40). San Miguel reached the highest levels at 220 DAF, whereas AVO40 increased α -tocopherol only after ripening (220 DAF + 5). A genome-wide search for VTE1 and VTE5 allowed to identify one and three genes, respectively. Both genotypes showed contrasting patterns of gene expression. Interestingly, AVO40 showed a highly positive correlation between α -tocopherol levels and gene expression of VTE1 and all VTE5 variants. On the other hand, San Miguel showed only a positive correlation between α -tocopherol level and VTE1 gene expression.
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ISSN:0921-9668
1573-9104
DOI:10.1007/s11130-022-00977-0