Document Detail

Photophobic behavior of maize roots.
MedLine Citation:
PMID:  22751294     Owner:  NLM     Status:  MEDLINE    
Primary roots of young maize seedlings showed peculiar growth behavior when challenged by placing them on a slope, or if whole seedlings were turned upside down. Importantly, this behavior was dependent on the light conditions. If roots were placed on slopes in the dark, they performed "crawling" behavior and advanced rapidly up the slope. However, as soon as these roots were illuminated, their crawling movements along their horizontal paths slowed down, and instead tried to grow downwards along the gravity vector. A similar light-induced switch in the root behavior was observed when roots were inverted, by placing them in thin glass capillaries. As long as they were kept in the darkness, they showed rapid growth against the gravity vector. If illuminated, these inverted roots rapidly accomplished U-turns and grew down along the gravity vector, eventually escaping from the capillaries upon reaching their open ends. De-capped roots, although growing vigorously, did not display these light-induced photophobic growth responses. We can conclude that intact root cap is essential for the photophobic root behavior in maize.
Christian Burbach; Katharina Markus; Yin Zhang; Markus Schlicht; František Baluška
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Publication Detail:
Type:  Journal Article     Date:  2012-07-01
Journal Detail:
Title:  Plant signaling & behavior     Volume:  7     ISSN:  1559-2324     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-09-17     Completed Date:  2013-02-07     Revised Date:  2013-07-12    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  874-8     Citation Subset:  IM    
IZMB, University of Bonn, Bonn, Germany.
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MeSH Terms
Morphogenesis / radiation effects
Phototropism / radiation effects*
Plant Roots / physiology*,  radiation effects*
Zea mays / physiology*,  radiation effects*

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