This dataset contains NMR and ecophysiological data that support the findings of a manuscript “Circadian variation of root water status in three herbaceous species assessed by portable NMR” submitted to Plants for publication. Data are acquired using NMR MOUSE® spectrometer as described in the article. For each plant, raw NMR depth profile data are in the compressed (win.rar RARLab® GmbH, Allemagne) file named “RawDataProfilesDactylis.rar, RawDataProfilesMedicago.rar and RawDataProfiles Plantago.rar”. The profiles acquired as the function of time are stored in the sequentially numbered binary .dat files with 4 colons. The first colon in contains the position of the measurement volume in micrometer, the second contains the average of the first 16 points of the 256 acquired echoes, the third one contains the average of the first 32 echoes whereas the fourth, which is used in the article, is the average value of the whole 256 echoes. The acquisition parameters are summarized in the acqu_XX.par file (where XX is the name of the species). The raw data of transversal echo decays for T2 measurements are in the compressed RawDadaT2DecaysXX.rar (XX= species name) which contain the numbered folders embedding the csv 3 colon-data file. The first colon is the time in ms, the two others are the real and imaginary part of the echo amplitude. The acquisition parameters are in in the acqu.par file located in the first folder. The full results of the nnls inversion of the echo decays wer also provided in the matlab (Matlab®, The MathWorks, Inc) .mat files DatctylisT2FitResultReg.mat, MedicagoT2FitResultReg.mat and PlantagoT2FitResultReg.mat In addition to the NMR Data, a compressed file "Ecophy_data.rar" containing ecophysiological data in Excel format is provided. Each excel workbook named according to the name of the species (“Data_D_glomerata.xlsx”, “Data_P_lanceolata.xlsx”, and “Data_M_sativa.xlsx”) contains climatic chamber parameters (sheet Climatic Chamber), ecophysiological data (sheet Ecophysiology) along with a sheet “ReadMe” sheet, describing the file content. Only data acquired during NMR experiments (depth profiles and T2 measurements) are provided. - The sheet “Climatic Chamber” is composed of 6 colons : the first contains the acquisition time of the CO2 concentration (colon 2) and of photosynthetic active radiation (colon 3). The fourth colon contains the acquisition time of air temperature (colon 5) and humidity (colon 6). - The sheet “Ecophysiology” is composed of 5 colons. The two first contain the acquisition time and the values of soil humidity respectively. The third colon contains the acquisition time of leaf water potential whose values are provided in the colons 4 and 5 (one colon/leaf).

matlab, 2019b