An effective time for CO<sup>2</sup> gas treatment in overcoming self-incompatibility in <italic>Brassica</italic><xref ref-type="fn" rid="fn1"><sup>1</sup></xref>

Abstract

An investigation was made to determine the effective time for CO2 treatment in overcoming self-incompatibility in Brassica. CO2 was effective when supplied to a self-pollinated flower while hundreds of pollen grains were germinating on the stigma. Since the effective time coincides with the attachment of pollen tubes to papilla cells, it is thought that CO2 produces a metabolic change in these cells during attachement.