Dynamics of annatto pigment synthesis and accumulation in seeds of Bixa orellana L. revealed by integrated chemical, anatomical, and RNA-Seq analyses

Moreira, Viviane Santos; Souza, Vinícius Carius de; Soares, Virgínia Lúcia Fontes; Sousa, Aurizângela Oliveira de; Nascimento, Katiucia de Souza de Ticila; Santana, Monique Reis de; Rebouças, Tiyoko Nair Hojo; Leitão, Carlos André Espolador; Goliatt, Priscila Vanessa Zabala Capriles; Faria, Daniele Vidal; Otoni, Wagner Campos; Costa, Márcio Gilberto Cardoso

doi:10.1007/s00709-023-01842-w

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Cited by 2 publications

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Advances in Tissue Culture and Transformation Studies in Non-model Species: Bixa orellana L. (Bixaceae)

Otoni,

Machado,

de Freitas Correia

et al. 2024

Plant Cell Culture Protocols

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Advances in Tissue Culture and Transformation Studies in Non-model Species: Bixa orellana L. (Bixaceae)

Otoni,

Machado,

de Freitas Correia

et al. 2024

Plant Cell Culture Protocols

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Plant age-dependent dynamics of annatto pigment (bixin) biosynthesis in Bixa orellana

Machado,

Faria,

Duarte

et al. 2023

Journal of Experimental Botany

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Age affects the production of secondary metabolites, but how developmental cues regulate secondary metabolism remains poorly understood. The achiote tree (Bixa orellana L.) is a source of bixin, an apocarotenoid used in diverse industries worldwide. Understanding how age-dependent mechanisms control bixin biosynthesis is of great interest for plant biology and for economic reasons. Here we overexpressed miRNA156 (miR156) in B. orellana to comprehensively study the effects of the miR156/SQUAMOSA PROMOTER BINDING PROTEIN–LIKE (SPL) module on the age-dependent bixin biosynthesis in leaves. The overexpression of miR156 in annatto plants (miR156ox) reduced BoSPL transcript levels, impacted leaf ontogeny, lessened bixin production, and increased abscisic acid (ABA) levels. Modulation of BoCCD4-4 and BoCCD1 expression, key genes in carotenoid biosynthesis, was associated with diverting the carbon flux from bixin to ABA in miR156ox leaves. Proteomic analyses revealed an overall low accumulation of most secondary metabolite-related enzymes in miR156ox leaves, suggesting that miR156-targeted BoSPLs may be required to activate several secondary metabolic pathways. Our findings suggest that the conserved BomiR156/BoSPL module is deployed to regulate leaf dynamics of bixin biosynthesis, and may create novel opportunities to fine-tune bixin output in B. orellana breeding programs.

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Dynamics of annatto pigment synthesis and accumulation in seeds of Bixa orellana L. revealed by integrated chemical, anatomical, and RNA-Seq analyses

Cited by 2 publications

References 38 publications

Advances in Tissue Culture and Transformation Studies in Non-model Species: Bixa orellana L. (Bixaceae)

Advances in Tissue Culture and Transformation Studies in Non-model Species: Bixa orellana L. (Bixaceae)

Plant age-dependent dynamics of annatto pigment (bixin) biosynthesis in Bixa orellana

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