Callose (β-1,3 glucan) is essential for Arabidopsispollen wall patterning, but not tube growth

Abstract

Contrary to a previous report, these results demonstrate that a structured exine layer is not required for pollen development, viability or fertility. In addition, despite the presence of callose-enriched walls and callose plugs in pollen tubes, the results presented here indicate that callose is not required for pollen tube functions.