TY - RPRT TI - Plotting a course: multiple signals guide pollen tubes to their targets. AU - Mark A Johnson AU - Daphne Preuss PY - 2002 DO - 10.1016/s1534-5807(02)00130-2 UR - https://pubmed.ncbi.nlm.nih.gov/11879633/ ID - 11879633 ER -