Studies on the life history of the population of an evergreen herb,Pyrola japonica, on the forest floor in a warm temperate region
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Photosynthetic and respiratory activities and gross production in relation to temperature conditions were investigated in the population of an evergreen herb,Pyrola japonica, growing on the floor of a deciduous forest in the warm temperate region of central Japan.
Analysis of the temperature-photosynthesis relationship ofP. japonica leaves during the growing season indicated distinct seasonal changes in the temperature optimum for photosynthesis. This population was found to be acclimatable to ambient air temperatures exceeding 15C, but this acclimation became less pronounced under thermal conditions below 15 C. This plant possessed narrow photosynthetic optima in the warm season but wide optima in the cold season. The shape of the temperature-respiration curve did not vary significantly with the months except for April. The Q10 for respiration between 10 C and 20 C was calculated to be 1.93–2.65. Annual dry matter loss associated with respiration was estimated to amount to 159.1 g d.w.m−2 based on the measurements of the seasonal changes in the respiratory activity of each organ. Gross production of this population was estimated to be 219.3 g d.w.m−2 year−1 as the sum total of the net production (60.2 g d.w.m−2year−1) and the respiration. Monthly gross production was high in the early growing season, and low and stable in winter.
Key wordsGross production Photosynthesis Pyrola japonica Respiration
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- Hogetsu, K., Y. Oshima, B. Midorikawa, Y. Tezuka, M. Sakamoto, I. Mototani andM. Kimura. 1960. Growth analytical studies in the artificial communities ofHelianthus tuberosus with different densities. Jap. J. Bot.17: 278–305.Google Scholar
- Kawano, S., J. Masuda, H. Takasu andF. Yoshie. 1983. The productive and reproductive biology of flowering plants. XI. Assimilation behavior of several evergreen temperate woodland plants and its evolutionary-ecological implications. J. Coll. Liberal Arts, Toyama Univ.16(1): 31–65.Google Scholar
- Kimura, M. 1970a. Analysis of production processes of an undergrowth of subalpineAbies forest,Pteridophyllum racemosum population. 1. Growth, Carbohydrate economy and net production. Bot. Mag. Tokyo83: 99–108.Google Scholar
- — 1970b. Analysis of production processes of an undergrowth of subalpineAbies forest,Pteridophyllum racemosum population. 2. Respiration, gross production and economy of dry matter. Bot. Mag. Tokyo83: 304–311.Google Scholar
- —,I. Mototani andK. Hogetsu. 1968. Ecological and physiological studies on the vegetation of Mt. Shimagare. VI. Growth and dry matter production of youngAbies stand. Bot. Mag. Tokyo81: 287–296.Google Scholar
- Kimura, M., M. Ohya and E. Tanaka. 1972. Production processes ofOphiopogon planiscapus population grown in a mixed forest stand. JIBP/PP-Photosynthesis Level III, Report 1971: 76–79.Google Scholar
- Midorikawa, B. 1959. Growth-analytical study of altherbosa on Mt. Hakkoda, northern-east Japan. Ecol. Rev.15: 83–117.Google Scholar
- Monsi, M. 1960. Dry matter reproduction in plants. 1. Schemata of dry-matter reproduction. Bot. Mag. Tokyo73: 81–90.Google Scholar
- Mooney, H.A., O. Björrkman andG.J. Collatz. 1978. Photosynthetic acclimation to temperature in the desert shrub,Larrea divaricata. 1. Carbon dioxide exchange characteristics in intact leaves. Pl. Physiol.61: 406–410.Google Scholar
- Oshim, Y. 1961. Ecological studies of Sasa communities. III. Photosynthesis and respiration ofSasa kurilensis. Bot. Mag. Tokyo74: 349–356.Google Scholar
- Taylor, R.J. andR.W. Pearcy. 1976. Seasonal pattern of the CO2 exchange characteristics of understory plants from a deciduous forest. Can. J. Bot.54: 1094–1103.Google Scholar