Document Detail

Do high-tannin leaves require more roots?
MedLine Citation:
PMID:  16804703     Owner:  NLM     Status:  MEDLINE    
The well-known deceleration of nitrogen (N) cycling in the soil resulting from addition of large amounts of foliar condensed tannins may require increased fine-root growth in order to meet plant demands for N. We examined correlations between fine-root production, plant genetics, and leaf secondary compounds in Populus angustifolia, P. fremontii, and their hybrids. We measured fine-root (<2 mm) production and leaf chemistry along an experimental genetic gradient where leaf litter tannin concentrations are genetically based and exert strong control on net N mineralization in the soil. Fine-root production was highly correlated with leaf tannins and individual tree genetic composition based upon genetic marker estimates, suggesting potential genetic control of compensatory root growth in response to accumulation of foliar secondary compounds in soils. We suggest, based on previous studies in our system and the current study, that genes for tannin production could link foliar chemistry and root growth, which may provide a powerful setting for external feedbacks between above- and belowground processes.
D G Fischer; S C Hart; B J Rehill; R L Lindroth; P Keim; T G Whitham
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-06-28
Journal Detail:
Title:  Oecologia     Volume:  149     ISSN:  0029-8549     ISO Abbreviation:  Oecologia     Publication Date:  2006 Oct 
Date Detail:
Created Date:  2006-09-21     Completed Date:  2006-12-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  668-75     Citation Subset:  IM    
School of Forestry, Northern Arizona University, Flagstaff, AZ 86011, USA.
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MeSH Terms
Hybridization, Genetic
Plant Leaves / metabolism*
Plant Roots / growth & development*
Polymorphism, Restriction Fragment Length
Populus / genetics,  growth & development,  metabolism*
Proanthocyanidins / metabolism*
Reg. No./Substance:

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