ion, the University of KwaZulu-Natal, South Africa and the Centre
of the Region Haná for Biotechnological and Agricultural Research,
Palacký University, Olomouc, Czech Republic (Grant No. ED000/01/
01). J.G. and K.D. acknowledge the support of the Operational
Program Education for Competitiveness - European Social Fund
(project CZ.1.07/2.3.00/20.0165). We also thank Mrs Alison Young
(UKZN Botanical Garden, Pietermaritzburg, South Africa) and her
staff for their assistance in maintaining the plants.