Complex electrical signatures of Maize and Brachypodium primary roots

We investigated the frequency-dependent electrical properties in terms of conduction and polarization of single root segments of Brachypodium (Brachypodium distachyon L.) and Maize (Zea mays L.). First we designed a sample holder to investigate the electrical properties of root segments and tested it on ideal resistors. We found that it is suitable to assess the electrical properties of crop root segments of 1-5 cm length in a frequency range between 1 Hz and 45 kHz. The system was then used to obtain the complex electrical response of Brachypodium and Maize root segments at 10 different ages, from 8-29 days after sowing (DAS). It was found that the electrical properties of the root segments varied with age and species. This variation was linked to root anatomy based on the microscopic analysis of root sections.

本研究旨在探讨小糠草（Brachypodium distachyon L.）和玉米（Zea mays L.）单个根段在传导和极化方面的频率依赖性电学特性。首先，我们设计了一种样品夹具以研究根段的电学特性，并在理想电阻器上进行了测试。结果表明，此夹具适用于评估长度在1至5厘米之间的作物根段在1 Hz至45 kHz频率范围内的电学特性。随后，该系统被用于获取小糠草和玉米根段在播种后8至29天（DAS）的10个不同龄期的复杂电响应。研究发现，根段的电学特性随龄期和物种的不同而变化，这种变化与基于根段横切面的显微镜分析所得的根部解剖学结构相关联。