| mating system and population genetic structure of an androdioecious tree, fraxinus lanuginosa koidz. (oleaceae) in northern japan. | models for the maintenance of androdioecy have suggested that selfing of hermaphrodites decreases the frequency of males in a population (the "male frequency"). to test this hypothesis, we used electrophoretic allozyme methods to study the mating system and population genetics of an androdioecious tree, fraxinus lanuginosa, which exhibits large variations in male frequency among subpopulations in central hokkaido (northern japan). we estimated the outcrossing rates by using seeds assayed at thre ... | 2002 | 11920138 |
| leaf anatomy and light acclimation in woody seedlings after gap formation in a cool-temperate deciduous forest. | the photosynthetic light acclimation of fully expanded leaves of tree seedlings in response to gap formation was studied with respect to anatomical and photosynthetic characteristics in a natural cool-temperate deciduous forest. eight woody species of different functional groups were used; two species each from mid-successional canopy species (kalopanax pictus and magnolia obovata), from late-successional canopy species (quercus crispula and acer mono), from sub-canopy species (acer japonicum an ... | 2006 | 16832649 |
| anatomy of the vessel network within and between tree rings of fraxinus lanuginosa (oleaceae). | the three-dimensional (3-d) arrangement of vessels and the vessel-to-vessel connections in the secondary xylem of the stem of the ring-porous hardwood tree fraxinus lanuginosa were studied in series of thick transverse sections with epifluorescence microscope and confocal laser scanning microscope. vessels were traced in sequential sections, and vessel networks were reconstructed in two segments of wood with dimensions of 2 × 1.4 × 21.2 mm(3) and 2 × 1.4 × 5.8 mm(3) (tangential × radial × axial) ... | 2004 | 21653432 |