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자료유형
학술저널
저자정보
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한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY JOURNAL OF THE KOREAN SOCIETY FOR HORTICULTURAL SCIENCE Vol.46 No.6
발행연도
2005.12
수록면
385 - 391 (7page)

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Most farmers have cultivated Ardisia pusilla, foliage plant native to Korea, under various temperatures and shading levels without a typical cultivation technology. This research was initiated to screen an adequate shading level and temperature for promoting photosynthesis of A. pusilla and also to provide practical information for A. pusilla-nursery through comparing photosynthetic rates with plant growth parameters. In shading experiment, photosynthetic rates of two-year-old A. pusilla plants acclimatized on four shading levels (0, 70, 80, and 90%) of sunlight for 35 days were measured using continuous sunlight transmitted through each shading net. In temperature experiment, two-month-old A. pusilla plants acclimatized at 20, 25, 30, and 35℃ under constant artificial light (450 ± 21 μ㏖ㆍm?²ㆍs?¹) within each large-scale chamber for 30 days were measured using incident artificial light. The measurements of net CO₂ assimilation rates (A<SUB>CO2</SUB>) in response to continuous photosynthetic photon flux (PPF) under sunlight revealed the typical characteristics of photosynthesis. Maximum CO₂ assimilation rate (A<SUB>max</SUB>) for 90, 80, 70, and 0% of shading level (SL) was 10.21, 8.04, 4.52, and 3.13 μ㏖ㆍm?²ㆍs?¹, respectively. Light compensation points (Γ<SUB>light</SUB>) for 90, 80, and 70% of SL was greatly lower than that for 0% of SL. ACO₂ also showed the exponential regression curves as typical characteristics of photosynthesis at each temperature. ACO₂ was higher at 25℃ than at 20℃ by about 3 μ㏖ㆍm?²ㆍs?¹ depending on PPF ranged from 0 to 1,800 μ㏖ㆍm?²ㆍs?¹. A<SUB>max</SUB> of A. pusilla acclimatized under 20, 25, 30, and 35℃ were 1.17, 4.09, 3.72, and 2.26 μ㏖ㆍm?²ㆍs?¹, respectively. The Γ<SUB>light</SUB> at 25℃ was greatly lower than at any other temperature. Comparing plant growth data, the plants acclimatized at 25℃ showed the highest values of all growth parameters such as plant height, leaf area, and dry weight, while the plants acclimatized under various SLs showed significant difference in chlorophyll value and leaf length. In conclusion, photosynthetic characteristics of A. pusilla plant distinctly depended on shading and temperature, and optimal value of two main factors promoting its photosynthesis and growth was 90% SL and 25℃.
#acclimatization #chlorophyll content #foliage plants #light saturation

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgement
Literature Cited

참고문헌 (26)

참고문헌 신청
[학술지(정기간행물)] - / 1982 / and chlorophyll content of shade- and sun-tolerant plants grown under different light regimes : 342 ~ 17 343 google schola [학술지(정기간행물)] - / 1996 / Myrsinaceae : 1 ~ 38 google schola [학술지(정기간행물)] - / 1999 / Photosynthetic characteristics and chlorophyll content of Hedera canariensis, and Ficus benjamina in response to photosynthetic photon fluxes and CO2 concentration 40 : 627 ~ 630 google schola [학술지(정기간행물)] - / 1998 / Photosynthesis and stomatal conductance of eight foliage plant species as affected by photosynthetic photon flux density and temperature 39 : 197 ~ 202 google schola [학술지(정기간행물)] - / 1982 / Net photosynthesis and transpiration of sun- and shade-grown Ficus benjamina leaves : 758 ~ 761 google schola

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