Fructokinase and Hexokinase from Pollen Grains of Bell Pepper (Capsicum annuum L.): Possible Role in Pollen Germination under Conditions of High Temperature and CO₂ Enrichment

Sugar phosphorylating enzymes in pollen grains

High temperatures cause flower abscission and seed abortion in peppers by reducing pollen grain germination and increasing pollination failure, whereas enrichment with CO₂ has the opposite effect. Karni and Aloni (pp. 607-612) suggest that possible explanations lie in the characteristics of hexo- and fructokinase, two enzymes involved in the first steps in hexose metabolism within pepper pollen.