Variations qualitatives et quantitatives des carbures terpéniques au cours de la croissance des rameaux et des aiguilles du Pin maritime: étude comparée de huit phénotypes

The variations of the monoterpene and sesquiterpene hydrocarbons have been studied during the growth of the needles and shoots of eight trees of maritime pine. These trees represent the eight possible phenotypic associations for 3-carene, myrcene and limonene. The 'monoterpene profiles' under genetic control are very comparable for a same individual but the differences between phenotypes are more important in oils from cortical tissues than in those from leaves mainly for the 3-carene content.α- and β-Pinene are synthetized very early in the three kinds of organs and tissues studied; needles, wood, and cortical tissues of young shoots. On the contrary, 3-carene, myrcene, and limonene are mainly elaborated in the needles and cortical tissues. The synthesis of limonene and myrcene starts later than that of pinenes and 3-carene. The sesquiterpenes are mainly elaborated in the needles and their accumulation is progressive.These variations during the growth of the organs suggest the existence of several paths ...