SOYBEAN STEM GROWTH UNDER HIGH-PRESSURE SODIUM WITH SUPPLEMENTAL BLUE LIGHTING
SOYBEAN STEM GROWTH UNDER HIGH-PRESSURE SODIUM WITH SUPPLEMENTAL BLUE LIGHTING
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DOI：
10.2134/agronj1991.00021962008300050024x
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发表时间：
1991-09-01
期刊：
影响因子：
2.1
通讯作者：
SAGER, JC
中科院分区：
文献类型：
--
作者：
WHEELER, RM;MACKOWIAK, CL;SAGER, JC
高压钠灯（HPS）因其高能量转换效率而在植物照明中广受欢迎。然而，它们的光谱中很少有蓝光（BL），这可能会引起不良的形态反应。为了研究这一点，‘McCall’大豆[Glycine max (L.)]稳定。在HPS灯下生长28 d，有或没有蓝色荧光灯的补充光。总光合光子通量（PPF）水平（包括蓝色荧光）保持在300或500 μ mol m-2 s-1附近。蓝色荧光水平范围为7至20 μ mol m-2 s-1，提供6至18 μ mol m-2 s-1的补充BL （400-500 nm）。茎秆和节间长度在300 μ mol m-2 s-1 HPS光照下最长，随着添加量的增加，茎秆和节间长度逐渐变短，直到光谱中出现大约30 μ mol m-2 s-1的BL（来自HPS和BL补充）。除此之外，额外的BL没有效果。另外两种富含BL的灯，金属卤化物灯（Optimarc）和荧光灯（Vita-Lite），也产生了短茎植物，HPS灯保持在500 μ mol m-2 s-1。结果表明，在低至中等光合光子通量水平下，使用高压钠或其他缺乏蓝光的光源可能会导致茎伸长异常，但这可以通过添加少量补充蓝光来防止。
High-pressure sodium (HPS) lamps are popular for plant lighting because of their high energy conversion efficiencies. Yet their spectrum has very little blue light (BL), which may cause undesirable morphological responses. To study this, 'McCall' soybean [Glycine max (L.) Merr.] plants were grown for 28 d in growth chambers using HPS lamps, with or without supplemental light from blue phosphor fluorescent lamps. Total photosynthetic photon flux (PPF) levels (including blue fluorescent) were kept near 300 or 500-mu-mol m-2 s-1. Blue fluorescent levels ranged from 7 to 20-mu-mol m-2 s-1, providing from 6 to 18-mu-mol m-2 s-1 of supplemental BL (400-500 nm). Stem and internode lengths were longest under 300-mu-mol m-2 s-1 HPS lighting and became progressively shorter with increasing supplemental BL until a total of approximately 30-mu-mol m-2 s-1 of BL (from HPS and BL supplement) was present in the spectrum. Beyond this, extra BL had no effect. Two other lamps rich in BL, metal halide (Optimarc) and fluorescent (Vita-Lite), also produced plants with short stems, as did HPS lighting maintained at 500-mu-mol m-2 s-1. Results suggest that use of high-pressure sodium or other blue-deficient sources for lighting at low to moderate photosynthetic photon flux levels may cause abnormal stem elongation, but this can be prevented by adding a small amount of supplemental blue light.