Leontopodium Alpinum Research Articles

Hydroxycinnamic acid esters from cell suspension cultures and plants of Leontopodium alpinum

Cell suspension cultures of Leontopodium alpinum were established in a modified Murashige and Sköog medium. The cultures were found to produce sitosterol and high concentrations of chlorogenic acid and 3,4-di- O-caffeoylquinic acid. Leaves and roots of Edelweiss plants obtained through micropropagation were also found to contain small amounts of these hydroxycinnamic acid esters together with sitosterol.

Sull'embriologia diLeontopodium Nivale(Ten.) Huet ex Hand. Mazz.

Abstract Embryology of « Leontopodium nivale » (Ten.) Huet ex Hand.-Mazz. — As in « Leontopodium alpinum » Cass. var. a typicum Fiori e Paoletti, from different alpine localities, no cases of apomixis have been observed (Maugini 1962) while Sokolowska-Kulczycka (1959) has noticed this phenomenon in the same species collected on the Tatra mountains, an embryological research on « Leontopodium nivale » (Ten.) Huet ex Hand. Mazz. has been undertaken. The material, collected in the alpine garden of Campo Imperatore (Abruzzo), has shown that the development of the female gametophyte occurs as in Leontopodium alpinum, according to the normal monomegasporial type which leads to the formation of an 8-nucleate gametophyte which at maturity is almost always poliantipodate. In « Leontopodium nivale » there is no trace of apomixix, but many cases of degeneration, particularly in the mature gametophyte, have been observed.

Morfologia fiorale embriologia ed embriog inLeontopodium alpinumCass. var. αtypicumfiori e Paoletti

Abstract FLOWER MORPHOLOGY, EMBRYOLOGY AND EMBRYOGENESIS OF LEONTOPODIUM ALPINUM CASS. VAR. α TYPICUM FIORI E PAOLETTI. — The present work has been carried on with capitules of L. alpinum var. α typicum, included and dissected, differing thus from the previous research which is also summarised (BEAUVERD 1909 a e b, 1910, 1012, 1913 a e b, 1914). The results are the following: all capitules of the same corymb of this species have the same structure, differing eventually in details. Generally they show outwards a few female flowers, inwards a relevant number of pseudohermaphrodite flowers (the sterile hermaphrodite of BEAUVERD). They are therefore subdioecious capitules with tendency to reduce the already scarce number of female flowers. Both female and pseudohermaphrodite flowers have been extensively described. Some rare hermaphrodite flowers with ovules and anthers, and very rare subhermaphrodite without ovules and empty or almost empty anthers have been also observed. On the same material, embryological...