THE BLUE LIGHT GRADIENT IN UNILATERALLY IRRADIATED MAIZE COLEOPTILES: MEASUREMENT WITH A FIBER OPTIC PROBE
THE BLUE LIGHT GRADIENT IN UNILATERALLY IRRADIATED MAIZE COLEOPTILES: MEASUREMENT WITH A FIBER OPTIC PROBE
复制标题
单侧照射的玉米胚芽鞘中的蓝光梯度：用光纤探针测量
DOI：
10.1111/j.1751-1097.1985.tb03528.x
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发表时间：
1985
影响因子：
3.3
通讯作者：
W. Haupt
中科院分区：
文献类型：
--
作者：
T. Vogelmann;W. Haupt
摘要：采用光纤微传感器测量单侧辐照的黄化玉米胚芽中的蓝光（450 nm）梯度。穿透和散射光的模式与胚芽的形态有关，在胚芽基部、中部和尖端之间差异很大。在胚芽鞘基部，光沿胚芽鞘均匀散射，致使胚芽鞘背阴面的光比初生叶背阴面的光多。在中空的中间区域，在空气-毡层界面处存在强反射边界，导致光梯度呈阶梯状跃迁。在胚芽鞘尖端，有一个陡峭的、接近线性的蓝光梯度，其中照射侧的光量最大。没有证据表明胚芽鞘的尖端起到透镜的作用，也没有证据表明胚芽鞘有异常现象，导致阴影处的光线比照射处的光线多。紧接在被照射的表面之下，空间辐照度大约是光束通量的两倍。中部和叶尖的光照梯度为4:1，胚芽鞘基部的光照梯度为8:1。
Abstract— The blue light (450 nm) gradient was measured with a fiber optic microsensor in etiolated maize coleoptiles that were irradiated unilaterally. Patterns of transmitted and scattered light across the shoot were related to the morphology of the coleoptile and varied greatly between the coleoptile base, mid‐region and tip. In the coleoptile base, light was scattered equatorially around the coleoptile sheath so that there was more light on the shaded side of the sheath than in the shaded side of the primary leaves. In the hollow mid‐region there were strong reflecting boundaries at the air‐coleoptile interfaces, which resulted in step like transitions in the light gradient. In the coleoptile tip, there was a steep, near‐linear gradient of blue light, with the greatest amount of light on the irradiated side. There was no evidence that the coleoptile tip acts as a lens or that there are anomalies that result in more light on the shaded than irradiated side. Immediately beneath the irradiated surface, the space irradiance was about twice the fluence rate of the light beam. The magnitude of the light gradient was 4:1 between the irradiated and shaded side of the mid‐region and tip and 8:1 for the coleoptile base.
影响因子：
3.8
作者：
A. Profio;D. Doiron
通讯作者：
A. Profio;D. Doiron