Ontology highlight
ABSTRACT:
SUBMITTER: Sogo A
PROVIDER: S-EPMC1150840 | biostudies-other | 2005 Jun
REPOSITORIES: biostudies-other
Proceedings of the National Academy of Sciences of the United States of America 20050602 24
In alders, where fertilization occurs approximately 8 weeks after pollination, the pollen tube (male gametophyte) grows intermittently in four steps in close association with the development of the ovary and its ovules. Pollen tubes stop growing in the style, at the ovarian locule, and at the chalaza (ovule), before reaching an embryo sac for fertilization. At the stage when the ovary develops an ovule primordium in each of the two locules, many pollen tubes germinate on the stigma, and a few of ...[more]