Kang Dong Il, Jeong Hai Kyoung, Park Yoo Gyeong, Jeong Byoung Ryong
Division of Applied Life Science (BK21 Plus Program), Graduate School, Gyeongsang National University, Jinju 52828, Korea.
Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Korea.
Plants (Basel). 2019 Apr 4;8(4):90. doi: 10.3390/plants8040090.
The effects of the quality and intensity of night interruption light (NIL) on the flowering and morphogenesis of kalanchoe () 'Lipstick' and 'Spain' were investigated. Plants were raised in a closed-type plant factory under 250 μmol·m·s 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 μmol·m·s or 20 μmol·m·s 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 μmol·m·s 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.
研究了夜间中断光（NIL）的质量和强度对长寿花‘口红’和‘西班牙’开花及形态发生的影响。植株在封闭型植物工厂中，于250μmol·m·s光合光子通量密度（PPFD）的白色发光二极管（LED）下培养，并进行额外的光照处理。这些处理被指定为长日照（LD，16小时光照，8小时黑暗）、短日照（SD，8小时光照，16小时黑暗）以及有4小时夜间中断的短日照（NI）。夜间中断光由10μmol·m·s或20μmol·m·s PPFD的蓝色（NI - B）、红色（NI - R）、白色（NI - W）或蓝白组合（NI - BW）LED构成。在‘西班牙’品种中，与短日照处理相比，夜间中断处理下叶片的叶绿素含量测定仪（SPAD）值、面积和厚度以及株高均有所增加。在‘口红’品种中，夜间中断处理下的大多数形态发生特征与短日照处理相比无显著差异。对于两个品种而言，短日照处理下的植株显著矮于其他处理。长寿花‘口红’的开花不受夜间中断光质量的影响，而长寿花‘西班牙’在短日照和10μmol·m·s PPFD的蓝色夜间中断光条件下开花。这些结果表明，夜间中断光的质量和强度会影响长寿花的形态发生和开花，且不同品种受到的影响不同。有必要进一步评估夜间中断光的质量和强度对短日照植物形态发生和开花的影响，以便实际应用夜间中断光。
