Understanding the causes and consequences of high-carotene Cassava roots

Becerra López-Lavalle Luis Agusto, Ortiz D., Sanchez Teresa, Calle Fernando, Ceballos Hernan, Dufour Dominique, Morante Nelson, Hershey Clair. 2012. Understanding the causes and consequences of high-carotene Cassava roots. In : Second Scientific Conference of the Global Cassava Patnership the 21st Century (GCP21-II), Kampala, Uganda, June 18-22, 2012. s.l. : s.n., Résumé, 1 p. Scientific Conference of the Global Cassava Partnership for the 21st Century. 2, Kampala, Ouganda, 18 Juin 2012/22 Juin 2012.

Matériel d'accompagnement : 1 poster

Résumé : A large dataset (2129 data points) was developed over the years of research to increase carotenoids content in cassava roots. Correlations were always based on more than 550 data points. Correlations between dry matter content (DMC) and total carotene content (TCC) or ?- carotene (TBC) were positive and weak (0.13 and 0.07, respectively). There is no problem, therefore, for producing biofortified cassava with adequate levels of DMC. Correlation between cyanogenic potential (HCN) and TCC was negative suggesting that it is possible to obtain highcarotene with low HCN values. Correlations of data from spectrophotometer and HPLC were very high. TCC and TBC had a high correlation (0.90) suggesting that most carotenoids in cassava roots are ?-carotene. Correlations between TCC and TBC with phytoene were relatively high (0.52 and 0.61, respectively). Correlations between TCC and TBC with phytofluene were 0.60 and 0.65, respectively. Correlation between phytoene and phytofluene was 0.96. No case where accumulation of phytoene or phytofluene without parallel levels of carotenoids was observed. Similarly there was no accumulation of phytoene without parallel levels of phtytofluene. There is no evidence, therefore, that accumulation of carotenoids in cassava roots is related to a blockage at the PSY or PDS steps in the carotenoids biosynthesis.

Classification Agris : F60 - Physiologie et biochimie végétale
F62 - Physiologie végétale - Croissance et développement

Auteurs et affiliations

• Becerra López-Lavalle Luis Agusto, CIAT (COL)
• Ortiz D., CIAT (COL)
• Sanchez Teresa, CIAT (COL)
• Calle Fernando, CIAT (COL)
• Ceballos Hernan, CIAT (COL)
• Dufour Dominique, CIRAD-PERSYST-UMR Qualisud (COL) ORCID: 0000-0002-7794-8671
• Morante Nelson, CIAT (COL)
• Hershey Clair, CIAT (COL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/565671/)

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