13 Result(s)
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Article
Costs and benefits of photosynthetic light acclimation by tree seedlings in response to gap formation
Some shade leaves increase their photosynthetic capacity (P max) when exposed to a higher irradiance. The increase in P max is associated with an increase in chloro...
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Article
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-temperat...
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Article
Effects of shift in flowering time on the reproductive output of Xanthium canadense in a seasonal environment
We studied the effects of a change in flowering date on the reproductive output of a short-day annual plant, Xanthium canadense. The flowering date was changed by photoperiodic manipulation to 1 month earlier or...
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Article
Leaf nitrogen distribution in relation to leaf age and photon flux density in dominant and subordinate plants in dense stands of a dicotyledonous herb
We studied the effects of photon flux density (PFD) and leaf position, a measure of developmental age, on the distribution of nitrogen content per unit leaf area (N area) in plants of different heights, in dense...
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Article
Photosynthetic capacity and nitrogen partitioning among species in the canopy of a herbaceous plant community
Partitioning of nitrogen among species was determined in a stand of a tall herbaceous community. Total amount of nitrogen in the aboveground biomass was 261 mmol N m−2, of which 92% was in three dominant species ...
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Article
Timing of seed germination and the reproductive effort in Xanthium canadense
The effect of different dates of germination on the timing of flowering and the final reproductive yield was examined in a short-day annual plant Xanthium canadense (cocklebur). Delays in germination of 30 and 60...
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Article
Growth schedule of Xanthium canadense: Does it optimize the timing of reproduction?
The effects of nutrition on the timing of reproductive initiation of a short-day annual plant Xanthium canadense (cocklebur) were examined with the following hypotheses in mind: If the plant always follows an opt...
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Article
Canopy structure and leaf nitrogen distribution in a stand of Lysimachia vulgaris L. as influenced by stand density
A hypothesis that a dense stand should develop a less uniform distribution of leaf nitrogen through the canopy than an open stand to increase total canopy photosynthesis was tested with experimentally establis...
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Article
Maximizing daily canopy photosynthesis with respect to the leaf nitrogen allocation pattern in the canopy
A model of daily canopy photosynthesis was constructed taking light and leaf nitrogen distribution in the canopy into consideration. It was applied to a canopy of Solidago altissima. Both irradiance and nitrogen ...
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Article
Graphical analysis of the life history evolution of Oenothera glazioviana Micheli
Five-year census data of a semelparous Oenothera glazioviana population in a sand dune system were graphically analyzed. Changes in survivorship until seed production and potential fecundity were calculated from ...
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Article
Soil nitrogen patterns induced by colonization of Polygonum cuspidatum on Mt. Fuji
The spatial pattern of soil nitrogen was analyzed for a patchy vegetation formed by the colonization of Polygonum cuspidatum in a volcanic “desert” on Mt. Fuji. Soils were sampled radially from the bare ground to...
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Article
Bolting induction in Oenothera erythrosepala Borbás in relation to rosette size, vernalization, and photoperiod
The relationships between rosette size, vernalization, and photoperiod in bolting induction of Oenothera erythrosepala (a facultative biennial) were examined. A natural population of O. erythrosepala in a sand du...
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Article
Critical plant size for flowering in biennials with special reference to their distribution in a sand dune system
Four biennial species (Oenothera erythrosepala, Dontostemon dentatus, Erigeron strigosus, and Erigeron sumatrensis) from the dune system at Azigaura, Japan, were sand-cultured in pots with different nutrient leve...
