You are signed in as:
  • IFPRI
  • Signed in via:
  • IP Address

  • Choose a colour
  • Correlates of leaf optical properties in tropical forest sun and extreme-shade plants.

    Author(s) : Lee, D. W.Bone, R. A.Tarsis, S. L.Storch, D.

    Author Affiliation : Department of Biological Sciences, Florida International University, Miami, FL 33199, USA.

    Journal article : American Journal of Botany 1990 Vol.77 No.3 pp.370-380 ref.69

    Abstract : Thirteen shade-adapted rain forest species were compared with twelve sun-adapted tropical forest species for correlates with leaf optical propertiesoptical propertiesSubject Category: Properties
    see more details
    . The two samples were similar in absorptance of quanta for photosynthesisphotosynthesisSubject Category: Natural Processes
    see more details
    , but the shade-adapted taxa had significantly lower specific leaf weights (indicating a more metabolically efficient production of surface for quantum capture), synthesized less chlorophyll per unit area and used less chlorophyll for capturing the same quanta for photosynthesis. The anatomical features that best correlated with this increased efficiency were palisade cell shape and chloroplast distribution. Palisade cells with more equal dimensions had more chloroplasts on their abaxial surfaces. This dense layer of chloroplasts maximizes the light capture efficiency limited by sieve effects. The more columnar palisade cells of sun-adapted taxa allow light to pass through the central vacuoles and spaces between cells, making chloroplasts less efficient in energy capture, but allowing light to reach chloroplasts in the spongy mesophyll. Pioneer speciespioneer speciesSubject Category: Organism Groups
    see more details
    may be an exception to these two groups of species. Three pioneer taxa included in this study had columnar palisade cells that were extremely narrow and packed closely together. This layer allows little penetration of light, but exposure of the leaf undersurface may provide illumination of spongy mesophyll chloroplasts in these plants.

    ISSN : 0002-9122

    DOI : 10.2307/2444723

    Record Number : 19920656261

    Language of text : English

    Indexing terms for this abstract:

    Organism descriptor(s) : plantsplantsSubject Category: Organism Names
    see more details

    Descriptor(s) : anatomyanatomySubject Category: Disciplines, Occupations and Industries
    see more details
    , BroadleavesbroadleavesSubject Category: Organism Groups
    see more details
    , FoliagefoliageSubject Category: Anatomical and Morphological Structures
    see more details
    , leavesleavesSubject Category: Anatomical and Morphological Structures
    see more details
    , lightlightSubject Category: Miscellaneous
    see more details
    , Light intensitylight intensitySubject Category: Properties
    see more details
    , optical propertiesoptical propertiesSubject Category: Properties
    see more details
    , PhotosynthesisphotosynthesisSubject Category: Natural Processes
    see more details
    , Pioneer speciespioneer speciesSubject Category: Organism Groups
    see more details
    , treestreesSubject Category: Organism Groups
    see more details
    , TropicstropicsSubject Category: Climate Related
    see more details
    , woody plantswoody plantsSubject Category: Organism Groups
    see more details

    Identifier(s) : broadleaved trees, carbon assimilation, carbon dioxide fixation, tropical countries, tropical zones

    Broader term(s) : eukaryoteseukaryotesSubject Category: Organism Names
    see more details