Optimization of Growth Environment in a Plant Production Facility Using a Chlorophyll Fluorescence Method

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
40-02-07.pdf335.72 KB

Chlorophyll fluorescence has been known as one of the indicators of photosynthetic status to various environmental stresses. The aims of this study were to assess the effects of environmental factors on lettuce chlorophyll fluorescent responses (Fv/Fm) and to develop an environment optimization model for lettuce growth using a simple genetic algorithm. High values of Fv/Fm were observed when environmental factors were 22-26°C ambient temperature, 15-23°C root zone temperature, 900-1,600 ppm CO2 concentration, 0.4-1.3 m·s-1 air current speed, and 65-85% relative humidity. As photosynthesis photon flux (PPF) increased over 150 μmol·m-2·s-1, Fv/Fm values were decreased. Principle compo-nent analysis was used to estimate the combined effects of six environmental factors on lettuce growth. The developed model fitted observed Fv/Fm values with an average standard error of 1.2%. An optimal environment for lettuce growth was estimated by the model to be 22°C ambient temperature, 20°C root zone temperature, 1,578 ppm CO2 concentration, 1.3 m·s-1 air current speed, 216 μmol·m-2·s-1 PPF, and 75% relative humidity. The Fv/Fm value can be a good indicator of plant stress level and thus a useful parameter to optimize the environment for plant growth.

作成者 KIM Kee-Sung GIACOMELII Gene A. SASE Sadanori SON Jung-Eek NAM Sang-Woon NAKAZAWA Fumio

environmental stress


genetic algorithm


principle component analysis

公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 149
終了ページ 156
DOI 10.6090/jarq.40.149
権利 Japan International Research Center for Agricultural Sciences
言語 eng