Document Detail

A biochemical model of photosynthesis for mango leaves: evidence for the effect of fruit on photosynthetic capacity of nearby leaves.
MedLine Citation:
PMID:  12615544     Owner:  NLM     Status:  MEDLINE    
Variations in leaf nitrogen concentration per unit mass (Nm) and per unit area (Na), mass-to-area ratio (Ma), total nonstructural carbohydrates (Ta), and photosynthetic capacity (maximum carboxylation rate, electron transport capacity, rate of phosphate release in triose phosphate utilization and dark respiration rate) were studied within the digitized crowns of two 3-year-old mango trees (Mangifera indica L.) on La Réunion Island. Additional measurements of Nm, Na, Ma, Ta and photosynthetic capacities were performed on young, fully expanded leaves of 11-year-old mango trees. Leaves of similar gap fractions were taken far from and close to developing fruits. Unlike Nm, both Na and Ta were linearly correlated to gap fraction. Similar relationships were found for all leaves whatever their age and origin, except for Ta, for which we found a significant tree effect. Photosynthetic capacity was nonlinearly correlated to Na, and a unique relationship was obtained for all types of leaves. Photosynthetic acclimation to light was mainly driven by changes in Ma, but allocation of total leaf N between the different photosynthetic functions also played a substantial role in acclimation to the lowest irradiances. Leaves close to developing fruits exhibited a higher photosynthetic capacity than other leaves, but similar Ta. Our data suggest that Ta does not control photosynthetic capacity in mango leaves. We used the data to parameterize a biochemically based model of photosynthesis and an empirical stomatal conductance model, allowing accurate predictions of net photosynthesis of leaves in field-grown mango trees.
L Urban; X Le Roux; H Sinoquet; S Jaffuel; M Jannoyer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Tree physiology     Volume:  23     ISSN:  0829-318X     ISO Abbreviation:  Tree Physiol.     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-03-04     Completed Date:  2004-04-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100955338     Medline TA:  Tree Physiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  289-300     Citation Subset:  IM    
INRA/CIRAD-Flhor, Station de Bassin-Martin, BP 180, 97455 Saint-Pierre, France.
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MeSH Terms
Carbohydrates / physiology
Fruit / physiology*
Mangifera / physiology*
Models, Biological
Nitrogen / physiology
Photosynthesis / physiology*
Plant Leaves / physiology*
Plant Transpiration / physiology
Reg. No./Substance:
0/Carbohydrates; 7727-37-9/Nitrogen

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

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