ISHS Acta Horticulturae 418: III International Symposium on Artificial Lighting in Horticulture
THE INFLUENCE OF LIGHT QUALITY ON GAS EXCHANGE OF DENDRANTHEMA |
| Authors: | F. Walz, W. Horn |
| Keywords: | Chrysanthemum, Dendranthema x grandiflorum, light quality, net photosynthesis, transpiration |
| Abstract:
Gas exchange rates after 17 days of light treatment were investigated using a high pressure sodium (SON-T) and a mercury metal halide (HQI-T) lamp. Short-time variation in light quality induces higher net photosynthesis rates with SON-T compared to HQI-T at each developmental stage. No difference in transpiration rates was observed in plants cultivated in greenhouses or in growth chambers. Plants cultivated continuously with HQI-T or SON-T reacted differently. At the same developmental stage HQI-T treated plants showed higher photosynthetic rates compared to plants from SON-T growth chamber. | |
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