Matter production processes ofReineckia carnea Kunth,an evergreen forest floor herb in the warm-temperate region of Japan |
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Authors: | Yasuo Yamamura |
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Institution: | (1) Department of Biology, Faculty of Science, Tokyo Metropolitan University, Setagaya-ku, 158 Tokyo |
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Abstract: | The growth and matter production were examined forReineckia carnea, an evergreen herb growing on the forest floor in a warm-temperate region. Seasonal change in the biomass of plants growing
in the field was estimated from the harvested sample plants. Carbohydrate contents and respiration rates were measured for
analysis of dry matter economy. Light intensity and temperature on the forest floor were periodically measured.
In mid-spring the biomass reached a maximum which was about half again its minimum value, found in autumn. Two phases, the
productive phase in cooler seasons and the developmental phase in warmer seasons, were distinguished from the annual growth
pattern of this plant. In cooler seasons, positive net production was found without any morphological changes, resulting in
active accumulation of reserves which were mainly soluble sugars. This high net production seems to be closely related to
the favorable light conditions and low respiratory losses. In warmer seasons, though new organs were developed, net production
remained low or was even negative. The morphological development of this plant in these seasons depended mostly on reserves
previously accumulated. This characteristic feature of annual matter economy is considered to be common to evergreen plants
on the forest floor in warm regions. |
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Keywords: | Carbohydrate Evergreen plants Matter production Reineckia carnea Reserves |
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