Siphonogamy
Sign in to savethumb|right|Pollen tubes, sperm, and ovule of Cycadophyta
~3 min read
Encyclopedic overview
3 sectionsContents
- Evolutionary context and significance
- Mechanism in seed plants
- References
thumb|right|Pollen tubes, sperm, and ovule of Cycadophyta
Siphonogamy is a condition in which non-motile sperm are transported to the egg through a microscopic pollen tube. The innovation is universal among seed plants (the spermatophytes) and contrasts with the free-swimming gametes of bryophytes, pteridophytes and many algal groups.
Excerpted from Wikipedia’s “Siphonogamy” article, available under the CC BY-SA 4.0 licence.