Device Development for Monitoring the Plant Water Stress through Surface Electric Potential Measurement

通过表面电位测量监测植物水分胁迫的设备开发

• 批准号: 07556005
• 负责人: YAMAGUCHI Junichi
• 金额: $ 4.86万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07556005/
• 关键词: Surface Electric Potential; Crop; Water Stress; High Impedance; Field bean; Potato; Rice; Earth

1) High impedance amplifier installed with a voltage follower circuit was developed for monitoring plant surface electric potential, together with a circuit accuracy tester.2) Parallel and non-parallel contact methods of the amplifier to plant were tested, where the latter was easier to contact, but was likely to be affected the atmospheric noise. Eventually, the both methods gave a similar accuracy.3) Field bean, potato and rice plants were grown in fields and in greenhouse, and various measurements were carried out using the device developed. Major results are : (i) The electric potential showed a diurnal change : an increase in day time and a decrease in night. The midday increase of field bean were larger in water stressed than in non-water stressed plants. (ii) The potential was higher at the lower than at the higher internodes in water stressed field bean, while the trend was reverse in the non-stressed plant. In potato, however, there were a great difference in the internode position. (iii) The variation of the potential at different stem positions was not in a simple manner, but the difference between positions was additeve. (iv) The potential at the upper internode decreased immediately after detaching the top at the order of several tenth mv, and then recovered gradually. (v) pH of the growing medium affected greatly to the potential. (vi) The potential was affected with the light condition, and its variation was likely to be induced with heat. (vii) Although the growing and atmospheric conditions were similar, there were a great variation of potentials among individual plants.4) Developed devices were successful to monitor plant surface potential. Difference among individual plants was, however, large and the response to environmental conditions varied greatly in each measurement. Therefore, we have to find the cause of these phenomena in a further study.

1)研制了用于植物表面电位监测的带电压跟随器电路的高阻抗放大器，并研制了电路精度测试仪。2)测试了放大器与植物的并联和非并联接触方式，其中非并联接触方式更容易接触，但容易受到大气噪声的影响。最后，这两种方法给出了相似的精度。3)在大田和温室里种植了豆类、马铃薯和水稻植株，并使用所研制的装置进行了各种测量。主要结果是：(1)电势呈日变化：白天增加，夜间减少。水分胁迫下，田间菜豆的午间增长幅度大于非水分胁迫植株。(2)在水分胁迫下，大田菜豆的节间电位在低位高于高位，而在非胁迫植株中则相反。然而，在马铃薯中，节间位置存在很大差异。(3)不同茎位的电位变化不是简单的，而是位间的差异是相加的。(4)去顶后上节间电位立即下降，约为几十mV，然后逐渐恢复。(V)生长介质的pH值对电势影响很大。(6)该电位受光照条件的影响，其变化可能是受热诱导的。(Vii)虽然生长和大气条件相似，但不同植物的电位差异很大。4)研制的设备成功地监测了植物表面电位。然而，不同植物之间的差异很大，而且每次测量对环境条件的反应都有很大的不同。因此，我们必须在进一步的研究中找到这些现象的原因。

项目成果

佐藤肇: "作物体表面電位による水分ストレス測定装置の検討" 日本育種学会・日本作物学会 北海道談話会会報. 37. 54-55 (1996)

Hajime Sato：“基于作物表面电位的水分胁迫测量装置的研究”日本育种学会/日本作物学会北海道学术讨论会通报37. 54-55（1996）。

Sato, H., Iwama, K., Yamaguchi, J.and Takayanagi, S.: "Device Development for Monitoring the Plant Water Stress through Surface Electric Potential Measurement" J.Hokkaido Branch, Jpn.Soc.Breeding and Jpn.Soc.Crop Sci.37. 54-55 (1996)

Sato, H.、Iwama, K.、Yamaguchi, J. 和 Takayanagi, S.：“通过表面电位测量监测植物水分胁迫的设备开发”J.Hokkaido Branch、Jpn.Soc.Breeding 和 Jpn.Soc。

佐藤 肇、岩間 和人、: "作物体表面電位による水分ストレス測定装置の検討" 日本育種学会・日本作物学会、北海道談話会会報. 37. 54-55 (1996)

Hajime Sato、Kazuto Iwama：“利用作物体表面电位的水分胁迫测量装置的研究”日本育种学会、日本作物科学会、北海道论坛公告 37. 54-55 (1996)。