Ontogeny and morphogenesis of the fruticose lichen Usnea florida (L.) Weber ex F.H. Wigg

Ontogeny and morphogenesis of the fruticose lichen Usnea florida (L.) Weber ex F.H. Wigg The development of the fruticose lichen Usnea florida was described in accordance with the concept of a discrete approach to the description of higher plant ontogeny proposed by T.A. Rabotnov and A.A. Uranov. The ontogeny of the U. florida thallus, represented by 4 periods and 11 ontogenetic states, includes the development of fungal hyphae from a spore, its association with alga into a primary thallus, thallus morphogenesis (the life form formation and destruction of the thallus), and all related morphological changes in the apothecia and other structures generated by the thallus. Based on an analysis of morphogenetic processes during thallus formation, we proposed morphological criteria for the separation of ontogenetic states. The formation of the main frame of the thallus and its intensive branching occur before the development of the apothecia because of the switching to the reproductive function. Thallus aging and destruction start even before fruit bodies formation (v2 state); later, these processes become more intensive and reach a maximum at the g3 and ss states. Changes in thallus morphogenesis can include both delay and acceleration of morphogenetic processes, representing the manifestation of adaptation mechanisms in response to different environmental factors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Developmental Biology Springer Journals

Ontogeny and morphogenesis of the fruticose lichen Usnea florida (L.) Weber ex F.H. Wigg

Loading next page...
SP MAIK Nauka/Interperiodica
Copyright © 2010 by Pleiades Publishing, Ltd.
Life Sciences; Animal Anatomy / Morphology / Histology; Developmental Biology
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial