Media type: E-Article Title: Localized Apical Increases of Cytosolic Free Calcium Control Pollen Tube Orientation Contributor: Malho, Rui; Trewavas, Anthony J. imprint: JSTOR, 1996 Published in: The Plant Cell Language: Not determined DOI: 10.2307/3870403 ISSN: 1040-4651 Origination: Footnote: Access State: Open Access