Photoperiod and cold night temperature in control of flowering in Kalanchoë
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Photoperiod and cold night temperature in control of flowering in Kalanchoë. / Lopes Coelho, Lívia; Kuligowska, Katarzyna; Lütken, Henrik Vlk; Müller, Renate.
Proceedings of the XXV International EUCARPIA Symposium Section Ornamentals: crossing borders. ed. / J. van Huylenbroeck; E. Dhooghe. International Society for Horticultural Science, 2015. p. 129-134 (Acta Horticulturae, Vol. 1087).Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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TY - GEN
T1 - Photoperiod and cold night temperature in control of flowering in Kalanchoë
AU - Lopes Coelho, Lívia
AU - Kuligowska, Katarzyna
AU - Lütken, Henrik Vlk
AU - Müller, Renate
N1 - Conference code: 25
PY - 2015
Y1 - 2015
N2 - Kalanchoë species and cultivars are produced as ornamental plants in many places in the world. The genus contains around 140 species comprising significant morphological variation, however, the number of species used for breeding is limited due to lack of knowledge of e.g., flower inducing factors. Having both parental plants flowering at the same time is vital for croßpollination; therefore, it is of significant importance to be able to control flowering time of the species of interest. The objective of this study was to control flower induction in K. marmorata and K. longiflora. K. prittwitzii was used as control species to validate treatments that consisted of combining short day photoperiod (8 h) and different night temperature (18, 12 and 6C). While K. prittwitzii had 100% flowering for all treatments, K. marmorata only flowered at 12C (33% plants flowering) and 6C (25% plants flowering), and K. longiflora did not flower in any of the treatments. The decrease of night temperature delayed the growth in all species and flowering in K. prittiwitzii and K. marmorata, and the number of open flowers in K. prittiwitzii was higher at 12C. The results demonstrate that there is a variation of the flowering stimuli in the Kalanchoë genus, and that short days are not the only factors controlling flowering. Even though short days are enough to induce flowering in easily-induced species (e.g., K. prittwitzii), cold night temperatures are required to flower-induce other species (e.g., K. marmorata). There are of course other factors limiting flower induction in K. marmorata and K. longiflora, which need to be addreßed in further studies.
AB - Kalanchoë species and cultivars are produced as ornamental plants in many places in the world. The genus contains around 140 species comprising significant morphological variation, however, the number of species used for breeding is limited due to lack of knowledge of e.g., flower inducing factors. Having both parental plants flowering at the same time is vital for croßpollination; therefore, it is of significant importance to be able to control flowering time of the species of interest. The objective of this study was to control flower induction in K. marmorata and K. longiflora. K. prittwitzii was used as control species to validate treatments that consisted of combining short day photoperiod (8 h) and different night temperature (18, 12 and 6C). While K. prittwitzii had 100% flowering for all treatments, K. marmorata only flowered at 12C (33% plants flowering) and 6C (25% plants flowering), and K. longiflora did not flower in any of the treatments. The decrease of night temperature delayed the growth in all species and flowering in K. prittiwitzii and K. marmorata, and the number of open flowers in K. prittiwitzii was higher at 12C. The results demonstrate that there is a variation of the flowering stimuli in the Kalanchoë genus, and that short days are not the only factors controlling flowering. Even though short days are enough to induce flowering in easily-induced species (e.g., K. prittwitzii), cold night temperatures are required to flower-induce other species (e.g., K. marmorata). There are of course other factors limiting flower induction in K. marmorata and K. longiflora, which need to be addreßed in further studies.
KW - Flower induction
KW - Kalanchoë longiflora
KW - Kalanchoë marmorata
KW - Kalanchoë prittwitzii
KW - Ornamental plant
U2 - 10.17660/ActaHortic.2015.1087.14
DO - 10.17660/ActaHortic.2015.1087.14
M3 - Article in proceedings
AN - SCOPUS:84940032101
SN - 978-94-62610-78-1
T3 - Acta Horticulturae
SP - 129
EP - 134
BT - Proceedings of the XXV International EUCARPIA Symposium Section Ornamentals
A2 - van Huylenbroeck, J.
A2 - Dhooghe, E.
PB - International Society for Horticultural Science
T2 - International EUCARPIA Symposium Section Ornamentals
Y2 - 28 June 2015 through 2 July 2015
ER -
ID: 160098531