Dataset of NMR Profiles and T2 for 10 herbaceous species grown on rhizotron along with morphological and ecophysiological data

Résumé 0

This dataset contains NMR (Profiles and T2 decay curves) and ecophysiological data acquired on 10 well-watered herbaceous species grown on rhizotron. Data were acquired using NMR MOUSE® spectrometer as described in the first article, 10.3390/plants10040782, based on 3 species and dealing with the state of water. In the present analysis, our aim was to understand the dynamics of root water quantity and mobility within roots during nychthemeral cycles for ten herbaceous species with contrasting root traits. The study was submitted to Plant and Soil journal for publication. Data are organized as follows : Ten Excel workbooks, one for each plant, containing six worksheets : 1)-“ReadMe” sheet, describing file contents, 2)-“ClimaticChamber” sheet, describing climatic chamber parameters, 3)- “Ecophysiology” sheet, containing ecophysiological data, 4)- “Root Morphological Traits” sheet, summarizing anatomical parameters, 5)-“Profiles” sheet, containing the NMR signal intensity as a function of measurement depth and 6)- “T2” sheet, containing the raw traverse decays acquired for T2 measurement. Only data acquired during NMR experiments (depth profiles and T2 measurements) are provided. - The sheet “Climatic Chamber” is composed of 5 columns : the first contains the acquisition time for the CO2 concentration (column 2). The third column contains the acquisition time for air temperature (column 4) and humidity (column 5). - The sheet “Ecophysiology” is composed of 7 columns. The first two columns contain the acquisition time and the values of soil humidity, respectively. The third column contains the acquisition time for leaf water potential whose values are provided in the columns 4 and 5 (one column/leaf). The sixth column contains the acquisition time for the Mean Gs (column 7). - The “Root Morphological Traits” worksheet contains the anatomical parameters measured on the root harvested at position corresponding to the NMR measurement windows and after the NMR sessions. After preparation according to the protocol described in the submitted article, using WinRhizoPRO software (V2012b, Régent Instruments, Québec, Canada) the root length (RootLength in m), average root diameter (RootD in mm), and root volume (RootV in cm3) were determined and recorded in the eponymous columns. In this worksheet, roots were classified according to their diameter (12 classes including 10 classes of 0.1 mm-wide increments from 0 mm to 1 mm and classified as Fine Roots while the remaining two, Coarse Roots, contain one class for diameters between 1 mm and 2 mm and one class for diameters higher than 2 mm). The RWC column corresponds to root water content (in g g-1) calculated as (fresh mass – dry mass) / (dry mass). The column SRL corresponds to the specific root length calculated as the average of the ratio of length to dry mass (m g-1); the column RTD corresponds to root tissue density, which was calculated, for all root types, as the ratio of dry mass to volume (g cm-3); RTD was also calculated for fine roots only (< 1mm) and was denominated by FineRTD. -The “Profils” worksheet contains the acquisition parameters and the list of acquisition times for each profile (NMR signal in the function of depth) located in the rar file "Profils_species_name.rar". The raw data (256 echoes) for each point are in the nested rar file "RawProfilsData(species name).rar". - The “T2” worksheet contains the acquisition parameters and the list of acquisition times for each transverse decay located in the rar file "RawT2Decays(species).rar". In three of the RawT2Decays archives, namely, Dactylis, Plantago and Medicago, the outputs of the NNLS inversion of the transversal decay, using a in house regularized NNLS algorithm on MATLAB (MathWorks, Natick, MA, USA) (https://www.mdpi.com/article/10.3390/plants10040782/s1) were also provided.