Scientia Horticulturae
Biran, I., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
Enoch, H.Z., Division of Agricultural Meteorology, The Volcani Center, Bet Dagan, Israel
Zieslin, N., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
Halevy, A.H., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
The effect of light intensity, temperature and CO2 concentration on anthocyanin content, blueing of flowers and size of flower buds was examined in 'Baccara' roses. Reflectance percentage at 425 nm was found to be an accurate measure of petal blueing. Reflectance was higher as the degree of blueing (determined by subjective estimation) increased and pigmentation decreased. During the first stage of development of the flower branch (elongation stage) temperature and light intensity had no effect on blueing. During Stage 2 of development (main stage of bud development), high temperatures and low light intensities caused blueing, whereas low temperatures during this stage, even at low light intensities, prevented blueing. Blueing was associated with low concentrations of CO2 (0-100 vpm) as well as darkness. High concentrations of CO2 (1500-3000 vpm) prevented blueing and increased pigmentation and flower size. The effectiveness of CO2 in preventing blueing is related to high light intensities. © 1973.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
The influence of light intensity, temperature and carbon dioxide concentration on anthocyanin content and blueing of 'Baccara' roses
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Biran, I., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
Enoch, H.Z., Division of Agricultural Meteorology, The Volcani Center, Bet Dagan, Israel
Zieslin, N., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
Halevy, A.H., Department of Ornamental Horticulture, The Hebrew University, Rehovot, Israel
The influence of light intensity, temperature and carbon dioxide concentration on anthocyanin content and blueing of 'Baccara' roses
The effect of light intensity, temperature and CO2 concentration on anthocyanin content, blueing of flowers and size of flower buds was examined in 'Baccara' roses. Reflectance percentage at 425 nm was found to be an accurate measure of petal blueing. Reflectance was higher as the degree of blueing (determined by subjective estimation) increased and pigmentation decreased. During the first stage of development of the flower branch (elongation stage) temperature and light intensity had no effect on blueing. During Stage 2 of development (main stage of bud development), high temperatures and low light intensities caused blueing, whereas low temperatures during this stage, even at low light intensities, prevented blueing. Blueing was associated with low concentrations of CO2 (0-100 vpm) as well as darkness. High concentrations of CO2 (1500-3000 vpm) prevented blueing and increased pigmentation and flower size. The effectiveness of CO2 in preventing blueing is related to high light intensities. © 1973.
Scientific Publication