期刊
PLANTS-BASEL
卷 8, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/plants8040090
关键词
light intensity; light quality; light spectrum; night break; photomorphogenesis
资金
- National Research Foundation of Korea [2016R1D1A3B03933450]
- National Research Foundation of Korea [2016R1D1A3B03933450] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The effects of the quality and intensity of night interruption light (NIL) on the flowering and morphogenesis of kalanchoe (Kalanchoe blossfeldiana) Lipstick' and Spain' were investigated. Plants were raised in a closed-type plant factory under 250 molm(-2)s(-1) PPFD white light emitting diodes (LEDs) with additional light treatments. These treatments were designated long day (LD, 16 h light, 8 h dark), short day (SD, 8 h light, 16 h dark), and SD with a 4 h night interruption (NI). The NIL was constructed from 10 molm(-2)s(-1) or 20 molm(-2)s(-1) PPFD blue (NI-B), red (NI-R), white (NI-W), or blue and white (NI-BW) LEDs. In Spain', the SPAD value, area and thickness of leaves and plant height increased in the NI treatment as compared to the SD treatment. In Lipstick', most morphogenetic characteristics in the NI treatment showed no significant difference to those in the SD treatment. For both cultivars, plants in SD were significantly shorter than those in other treatments. The flowering of Kalanchoe Lipstick' was not affected by the NIL quality, while Kalanchoe Spain' flowered when grown in SD and 10 molm(-2)s(-1) PPFD NI-B. These results suggest that the NIL quality and intensity affect the morphogenesis and flowering of kalanchoe, and that different cultivars are affected differently. There is a need to further assess the effects of the NIL quality and intensity on the morphogenesis and flowering of short-day plants for practical NIL applications.
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