通过核磁共振对植物水流进行非侵入性测量。
Noninvasive measurement of plant water flow by nuclear magnetic resonance.
作者信息
van As H, Schaafsma T J
出版信息
Biophys J. 1984 Feb;45(2):469-72. doi: 10.1016/S0006-3495(84)84170-3.
Water flow through the stem of an intact cucumber plant has been measured by using pulsed NMR. This method yields the linear flow velocity of the sapstream, found to be proportional to the loss of weight due to evaporation. The presence of a large excess of stationary water (for cucumber 95% of the total water content) does not interfere with the detection of a small amount of flowing water, due to cancellation of the NMR signal of stationary water. This makes the method particulary suitable for application to biological systems with a high stationary water content.
通过使用脉冲核磁共振技术，已对完整黄瓜植株茎中的水流进行了测量。该方法得出了液流的线性流速，发现其与因蒸发导致的重量损失成正比。由于静止水的核磁共振信号相互抵消，大量过剩的静止水（对于黄瓜而言，占总含水量的95%）的存在并不干扰对少量流动水的检测。这使得该方法特别适用于静止含水量高的生物系统。
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