Oxygen radicals and cytoplasm zoning in growing lily pollen tubes.

Differential modulation of ROS content of the microenvironment (O ¯/MnTMPP/OH·) affects growth speed and morphology in lily pollen tubes. Oxygen radicals influence ionic zoning: membrane potential and pH gradients. Recently, redox-regulation of tip growth has been extensively studied, but differential sensitivity of growing cells to particular ROS and their subcellular localization is still unclear.

Dynamics of Pollen Activation and the Role of H-ATPase in Pollen Germination in Blue Spruce ().

Pollen is a highly specialized structure for sexual plant reproduction. Early stages of pollen germination require the transition from dormant state to active metabolism. In particular, an important role during this early phase of angiosperm pollen germination is played by H-ATPase.

Redox-regulation of ion homeostasis in growing lily pollen tubes.

The pollen tube is characterized by cytoplasm compartmentalization typical for cells with polar growth. This concept includes "ion zoning", i.e.