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Ultra-short term plant growth dynamics under cadmium stressusing Statistical Interferometry Technique

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Abstract

Heavy metals such as cadmium are life threatening substances and causing a serious soil pollution in many countries. Recently, an environmental technique called phytoremediation has been getting attention to solve the problem. The technique employs specific plants to absorb and remove the pollutant from the soil. In this study, an evaluation method of the influence of the heavy metal on plant growth using a novel optical interference method named Statistical Interferometry Technique (SIT), which was developed by the authors. The very short term growth dynamics under the effect of cadmium were measured for pea (Pisum sativum L.) in real time with very high sensitivity in the order of sub-nanometer. We have paid a special attention to Nanometric Intrinsic Fluctuations (NIF)2 (Fig. 3) which are the fluctuations discovered in plants growth rate over very short periods, e.g, 5.5 seconds. The Standard deviation (SD) of NIF was found to be the indicator of the plant healthiness.

© 2014 Japan Society of Applied Physics, Optical Society of America

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