Blue light irradiation induces pollen tube rupture in various flowering plants

Abstract

Pollen tubes exhibit one of the fastest apical growth rates among plant cells. Maintaining the proper balance between turgor pressure and cell wall synthesis at the pollen tube tip is crucial for this rapid growth, and any disruption can result in pollen tube rupture. In our study, we reveal that exposure to short-wavelength visible light, specifically blue light, induces pollen tube rupture. The frequency of pollen tube rupture increases in an intensity-dependent manner. Additionally, we observed Ca2+influx after blue light irradiation, accompanying with either pollen tube rupture or a temporary halt in elongation. These findings offer insights into the interplay between pollen tube integrity maintenance and Ca2+influx at the pollen tube tip, presenting a novel and efficient method to control pollen tube burst.Subject Areas(1) growth and development(11) new methodology