IMPORTANCE OF BLUE PHOTON LEVELS FOR LETTUCE SEEDLINGS GROWN UNDER RED-LIGHT-EMITTING DIODES
IMPORTANCE OF BLUE PHOTON LEVELS FOR LETTUCE SEEDLINGS GROWN UNDER RED-LIGHT-EMITTING DIODES
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DOI：
10.21273/hortsci.27.5.427
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发表时间：
1992-05-01
期刊：
影响因子：
1.9
通讯作者：
TIBBITTS, TW
中科院分区：
文献类型：
--
作者：
HOENECKE, ME;BULA, RJ;TIBBITTS, TW
具有高强度输出的发光二极管（LED）正被研究作为植物的光合光源。高输出LED在几乎等于660 nm处具有集中在+/-30 nm的波段中的峰值发射。莴苣（莴苣“Grand Rapids”）幼苗在这些LED作为唯一辐照源下生长时，发育出延伸的下胚轴和伸长的子叶。当红色LED辐射补充有来自蓝色荧光灯的超过15 μ mol.m-2.s-1的400- 500-nm光子时，这种延伸和伸长被阻止。蓝色辐射效应与红色辐射的光子水平无关。
Light-emitting diodes (LEDs) with high-intensity output are being studied as a photosynthetic light source for plants. High-output LEDs have peak emission at almost-equal-to 660 nm concentrated in a waveband of +/-30 nm. Lettuce (Lactuca sativa `Grand Rapids') seedlings developed extended hypocotyls and elongated cotyledons when grown under these LEDs as a sole source of irradiance. This extension and elongation was prevented when the red LED radiation was supplemented with more than 15-mu-mol.m-2.s-1 of 400- to 500-nm photons from blue fluorescent lamps. Blue radiation effects were independent of the photon level of the red radiation.