1. Research Centre for Plant Growth and Development; School of Life Sciences; University of KwaZulu-Natal; Pietermaritzburg Campus, P/Bag X01 Scottsville 3209 South Africa
2. Institute of Biosystems Engineering; Faculty of Agricultural and Food Sciences; University of West Hungary; Mosonmagyaróvár H-9200 Hungary
3. Institute of Plant Biology; Faculty of Agricultural and Food Sciences; University of West Hungary; Mosonmagyaróvár H-9200 Hungary