Impédance in vivo des organes aériens de certaines plantes mono- et dicotylédones

We measure in this paper the electrical capacitance and resistance of aerial organs of some plants, grown in the laboratory (sunflower, pumpkin, and maize, of different ages) or bought at the market (sorrel), in a range of 34 frequencies, from 40 Hz to 100 kHz. The electrospectrometric curves of the leaves aged 14 days of the dicotyledoneous studied are close to each other. They diverge from that of corn, which is monocotyledonous. The opposite organs, as the leaves or the cotyledons, of a same plant have different impedances. Beyond 14 days, the sunflower leaf gives no more any typical electrospectrometric curve. To cite this article: S. Laarabi et al., C. R. Biologies 328 (2005).