positive phototropism

• 正趋光性

positive phototropism的用法和样例：

例句

1. Gametes showed intensive positive phototaxis.After syngamy motile zygotes, gametes as well as quadriflagellated zoospores showed negative phototaxis.
   雌雄配子具有正趋光性，易大量聚集，结合后同游孢子一样都呈负趋光性。