Document Detail

Architectural plasticity in a Mediterranean winter annual.
MedLine Citation:
PMID:  22499177     Owner:  NLM     Status:  MEDLINE    
Size variability in plants may be underlain by overlooked components of architectural plasticity. In annual plants, organ sizes are expected to depend on the availability and reliability of resources and developmental time. Given sufficient resources and developmental time, plants are expected to develop a greater number of large branches, which would maximize fitness in the long run. However, under restrictive growth conditions and environmental reliability, developing large branches might be risky and smaller branches are expected to foster higher final fitness. Growth and architecture of Trifolium purpureum (Papilionaceae) plants from both Mediterranean (MED) and semi-arid (SAR) origins were studied, when plants were subjected to variable water availability, photoperiod cues and germination timing. Although no clear architectural plasticity could be found in response to water availability, plants subjected to photoperiod cuing typical to late spring developed fewer basal branches. Furthermore, plants that germinated late were significantly smaller, with fewer basal branches, compared with plants which grew for the same time, starting at the beginning of the growing season. The results demonstrate an intricate interplay between size and architectural plasticities, whereby size modifications are readily induced by environmental factors related to prevalent resource availability but architectural plasticity is only elicited following the perception of reliable anticipatory cues.
Hagai Shemesh; Benjamin Zaitchik; Tania Acuña; Ariel Novoplansky
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-04-01
Journal Detail:
Title:  Plant signaling & behavior     Volume:  7     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-09-17     Completed Date:  2013-02-07     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  492-501     Citation Subset:  IM    
Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, Israel.
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MeSH Terms
Germination / physiology
Mediterranean Region
Plant Shoots / anatomy & histology
Time Factors
Trifolium / anatomy & histology*,  growth & development

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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