单色
生物
发光二极管
光合作用
蓝光
植物
叶绿素荧光
气孔密度
干燥
叶绿素
光形态发生
园艺
光学
物理
基因
突变体
生物化学
拟南芥
作者
Mehdi Seif,Sasan Aliniaeifard,Mostafa Arab,Mahboobeh Zare Mehrjerdi,Aida Shomali,Dimitrios Fanourakis,Tao Li,Ernst J. Woltering
摘要
Light emitting diodes (LEDs) now enable precise light quality control. Prior to commercialisation however, the plant response to the resultant light quality regime ought to be addressed. The response was examined here in chrysanthemum by evaluating growth, chlorophyll fluorescence (before and following water deficit), as well as stomatal anatomy (density, size, pore dimensions and aperture heterogeneity) and closing ability. Plants were grown under blue (B), red (R), a mixture of R (70%) and B (RB), or white (W; 41% B, 39% intermediate spectrum, 20% R) light LEDs. Although R light promoted growth, it also caused leaf deformation (epinasty) and disturbed the photosynthetic electron transport system. The largest stomatal size was noted following growth under B light, whereas the smallest under R light. The largest stomatal density was observed under W light. Monochromatic R light stimulated both the rate and the degree of stomatal closure in response to desiccation compared with the other light regimes. We conclude that stomatal size is mainly controlled by the B spectrum, whereas a broader spectral range is important for determining stomatal density. Monochromatic R light enhanced stomatal ability to regulate water loss upon desiccation.
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