EFFECT OF PHOSPHORUS DEFICIENCY ON SPECTRAL REFLECTANCE AND MORPHOLOGY OF SOYBEAN PLANTS
EFFECT OF PHOSPHORUS DEFICIENCY ON SPECTRAL REFLECTANCE AND MORPHOLOGY OF SOYBEAN PLANTS
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DOI：
10.1016/0034-4257(91)90034-4
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发表时间：
1991-05-01
影响因子：
13.5
通讯作者：
AGER, CM
中科院分区：
文献类型：
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作者：
MILTON, NM;EISWERTH, BA;AGER, CM
大豆植物在具有三种浓度水平的磷的溶液培养溶液中生长。 光谱反射率的变化包括更高的反射率在绿色和黄色部分的电磁波谱在磷缺乏的植物和不同的位置的长波长边缘（红边）的叶绿素吸收带中心附近0.68 μ m。 在生长介质中具有最少磷的植物没有显示出随着叶子成熟而发生的红边向较长波长的正常偏移。 缺磷植株地上部和根系生物量显著降低。 这些结果是一致的，当大豆植物与高浓度的金属元素的剂量。 我们假设，营养失衡或异常的金属浓度在土壤中设置在土壤/根界面的生理条件下，负责在实验室和现场研究中观察到的反射率的差异生长在基质中富含金属元素的植物。
Soybean plants were grown in hydroponic solutions having three concentration levels of phosphorus. Spectral reflectance changes included higher reflectance in the green and yellow portions of the electromagnetic spectrum in phosphorus-deficient plants and a difference in position of the long wavelength edge (the red edge) of the chlorophyll absorption band centered near 0.68-mu-m. Plants having the least phosphorus in the growing medium did not show the normal shift of the red edge to longer wavelength which occurs as leaves mature. Shoot and root biomass were significantly lower in the phosphorus-deficient plants. These results are consistent with those obtained when soybean plants are dosed with elevated concentrations of metallic elements. We hypothesize that nutrient imbalances or anomalous metal concentrations in the soil set up physiological conditions at the soil / root interface that are responsible for the reflectance differences observed in laboratory and field studies of plants growing in substrates enriched in metallic elements.