Definition of heterosporous in English:

Share this entry

heterosporous

Pronunciation: /ˌhetəˈräspərəs/ Pronunciation: /-ərəˈspôrəs/

adjective

Biology Producing two different kinds of spores.
Example sentences
  • Both of these genera are heterosporous, meaning that each species produces two distinctly different types of spores: microspores and megaspores.
  • Therefore, improved sampling and a better understanding of the morphology of fossils with affinities to these families are necessary to understand the origin and evolution of the heterosporous fern clade.
  • Some of the large sphenophyte trees of the Paleozoic were heterosporous, producing large megaspores and small microspores, and probably retaining the megaspore in the strobilus.

Derivatives

heterospory

noun
Example sentences
  • The Order Isoetales and Lepidodendrales are sometimes included in the Subclass Ligulatae - defined by the presence of ligules, heterospory, and endospory.
  • Since the ‘seed habit’ begins with the reduction to a single functional megaspore in each megasporangium, heterospory seems like a logical intermediate step.
  • According to this argument, heterospory was the intermediate between homosporous free-sporing reproduction and the retained endosporic gametophyte of the seed habit.

For editors and proofreaders

Syllabification: het·er·os·po·rous

Share this entry
 

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.