NDLI: Optimum heating hour to maintain vegetative growth and inhibit premature inflorescence initiation of six-month and one-year-old Phalaenopsis hybrids

Content Provider	Springer Nature Link
Author	An, Seoung Kwang Kim, Yoon Jin Kim, Ki Sun
Copyright Year	2013
Abstract	This experiment examined the effects of heating hour at 29°C to maintain the vegetative growth and to inhibit premature inflorescence initiation in two stages, immature (6-month-old) and mature (1-year-old), Phalaenopsis hybrids in order to save heating expenses. Plants of Phalaenopsis Norman’s Jade ‘Green Apple’ and Doritaenopsis Queen Beer ‘Mantefon’ at 6-month-old and 1-year-old were grown in separate growth chambers with heating at 29°C for 6, 12, 18, and 24 hours. The photoperiod was 16/8 hours (day/night) consisting of 12 hours PPFD at 120 ± 10 μmol·m$^{−2}$·s$^{−1}$ (06:00–18:00 HR) with 4 hours PPFD at 25 ± 10 μmol·m$^{−2}$·s$^{−1}$ (18:00–22:00 HR) as a photoperiod-extension. Inflorescence initiation was inhibited in 6-month-old ‘Green Apple’ regardless of the heating hour treatments. However, inflorescence initiation of ‘Mantefon’ at both stages and ‘Green Apple’ at 1-year-old was inhibited only when the plants were exposed at least for 12 hours at 29°C. Overall, the inflorescence initiation of the plants was inhibited or delayed more in 6-month-old plants than 1-year-old plants. Leaf span of the plants was similar among 12, 18, and 24 hours-29°C treatments, except for 6 hours-29°C treatment. In conclusion, it is recommended that high temperature heating at 29°C for at least 12 hours during the day could increase vegetative growth sufficiently and prevent premature inflorescence initiation completely, even though nigh temperature decreased to 20°C in Phalaenopsis hybrids at immature stage. These approaches could be used to save heating cost during the winter season cultivation.
Starting Page	91
Ending Page	96
Page Count	6
File Format	PDF
ISSN	22113452
Journal	Horticulture, Environment, and Biotechnology
Volume Number	54
Issue Number	2
e-ISSN	22113460
Language	English
Publisher	Korean Society for Horticulture and Science
Publisher Date	2013-05-11
Publisher Place	Korea
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Breeding/Biotechnology Plant Physiology Agriculture Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Horticulture Biotechnology

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