Ploidy level and caffeine content in leaves of Coffea

Several species of Coffea and varieties of C. arabica differing in chromosome number had their caffeine content determined in the leaves. For Coffea arabica var. "Angustifolia", var. "Caturra" and var. "Icatu", it was observed caffeine decrease from the haploid (2n = 22) to tetraploid leaves (2n = 44). Caffeine in the tetraploid "Angustifolia" was decreased by 50% when compared to the haploid. Caffeine reduction was also observed in leaves of C. canephora var. "Kouilou" as chromosome number was increased (2n = 22 ® 2n = 44). In this case, caffeine in the leaves of the diploid genotype was close to 4 times higher than in the tetraploid. On the other hand it was observed an increase of the alkaloid when the chromosome number was doubled in the C. canephora var. "Robusta".

Bibliographic Details

Main Authors:	Silvarolla,Maria Bernadete, Mazzafera,Paulo, Lima,Marinez Muraro Alves de, Medina Filho,Herculano Penna, Fazuoli,Luiz Carlos
Format:	Digital revista
Language:	English
Published:	Escola Superior de Agricultura "Luiz de Queiroz" 1999
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000300021
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