Carotenoid composition and its chemotaxonomic significance in leaves of ten species of the genus Ceratozamia (Cycads)

Quantitative variations of individual carotenoids in relationship with the leaflet development of six species of the genus Ceratozamia (Cycads)

“…On the contrary, HPLC yielded mediocre recoveries which ranged from 60% to 80%, particularly low for the six stroma keto-carotenoids. Therefore, HPLC was used only for qualitative purposes (Cardini and Morassi Bonzi, 2005).…”

“…Specific extinction coefficients A 1% 1 cm used for the quantitative analysis of the six stroma keto-carotenoids considered. For the relative structure formulas see Table 2 in Cardini and Morassi Bonzi, 2005 Stroma keto-carotenoids Exact mass found differences also exist among the species only in stage I, with the exception of lutein-5,6-epoxide in C. robusta (Table 4).…”

“…Recently, Cardini and Morassi Bonzi (2005) described the qualitative carotenoid composition of leaflets of ten species of genus Ceratozamia. The study of that complex composition concerned the presence and the characterization of 16 carotenoids and their distribution and location in the chloroplasts.…”

“…Eight classic carotenoids were located, typically, in the thylakoidal membranes of the species examined. Moreover, a very particular occurrence of a mixture of eight keto-carotenoids, unusually located in several plastoglobules, was present in the leaflets stroma of nine species (C. mexicana, excluded) (Cardini and Morassi Bonzi, 2005).…”

“…The pre-stages were related to desegregation of the prolamellar body and to the early development of thylakoidal apparatus in yet unexpanded leaflets (see Fig. 1a Morassi Bonzi et al, 1996;Cardini and Morassi Bonzi, 2005).…”