Characteristics and pathways of bioactive 4-desmethylsterols, triterpene alcohols and 4α-monomethylsterols, from developing Tunisian cultivars and wild peanut (Arachis hypogaea L.).

Aicha O. Cherif (1) , Mhamed Ben Messaouda (2) , Belhassen Kaabi (3) , Isabelle Pellerin (4) , Sadok Boukhchina (1) , Habib Kallel (1) , Claude Pepe (4)

1 UTM - Université de Tunis El Manar
2 IPEST - Institut préparatoire aux études scientifiques et techniques [La Marsa]
3 Institut Pasteur de Tunis
4 LADIR - Laboratoire de Dynamique Interactions et Réactivité

Seven 4-desmethylsterols, five triterpene alcohols and three 4α-monomethylsterols were identified by GC-MS during the development of wild peanut, which is Arbi (AraA), and cultivars peanut, which are Trabelsia (AraT) and Chounfakhi (AraC). Our results showed that the maximum level of 4-desmethylsterols (881.07 mg/100 g of oil) was reached at 12 days after flowering (DAF) date of peanut plant in AraA, as well as the highest level of triterpene alcohols (31.51 mg/100 g of oil) was reached at 23 DAF in AraA, whilst, the highest level of 4α-monomethylsterols (15.11 mg/100 g of oil) was reached at 41 DAF in AraC. Herein, the level of triterpene alcohols and 4α-monomethylsterols was overwhelmed by the amount of 4-desmethylsterols at each stage of peanut maturity. Differences were observed in each sterol contents among the studied cultivars and wild one especially in immature stage.

Mots clés: 4 alpha-monomethylsterols; Wild peanut; Cultivars peanut; Accumulation; 4-desmethylsterols; Triterpene alcohols

Domaines: Sciences du Vivant [q-bio]; Sciences de l'environnement

Aicha O. Cherif, Mhamed Ben Messaouda, Belhassen Kaabi, Isabelle Pellerin, Sadok Boukhchina, et al.. Characteristics and pathways of bioactive 4-desmethylsterols, triterpene alcohols and 4α-monomethylsterols, from developing Tunisian cultivars and wild peanut (Arachis hypogaea L.).. Plant Physiology and Biochemistry, 2011, 49 (7), pp.774-81. ⟨10.1016/j.plaphy.2011.02.009⟩. ⟨pasteur-01375280⟩