{
"METABOLOMICS WORKBENCH":{"STUDY_ID":"ST002779","ANALYSIS_ID":"AN004525","VERSION":"1","CREATED_ON":"July 12, 2023, 2:05 pm"},

"PROJECT":{"PROJECT_TITLE":"20-0029 - Role of spatial differentiation of metabolism in local colonization of microbiota along the root axis","PROJECT_SUMMARY":"Longitudinal gut-axes of animals show spatial heterogeneity of microbiota related to physiological differentiation. Plant roots show functional heterogeneity in cellular architecture, transcriptome, metabolic states, and immunity. We hypothesized that axial differentiation impacts spatial colonization by rhizobiota along the root axis. We developed two growth systems, ArtSoil and CD-Rhizotrons, to dissect Arabidopsis thaliana roots into three segments. We identified distinct rhizobiota communities in the segments, supporting spatial microbiota differentiation along the axis. Root metabolite profiling revealed differential enrichment and specificity. Correlation analyses point to strong reliance of rhizobiota on carbohydrate supply from the host. Bioinformatic analyses and GUS histochemistry indicate sugar and/or microbe-induced accumulation of SWEET2, 4, and 12 sugar uniporters. Profiling of root-segments in sweet mutants showed impaired spatial rhizobiota arrangement. Correlation analysis revealed complex interconnected metabolite-rhizobiota networks. This work uncovers interdependency between root physiology and microbiota colonization and a contribution of SWEETs to shaping local adaptation of root microbiota.","INSTITUTE":"Heinrich Heine University Düsseldorf","LABORATORY":"Plant Metabolism and Metabolomics Laboratory","LAST_NAME":"Westhoff","FIRST_NAME":"Philipp","ADDRESS":"Universitätsstr. 1 40225 Düsseldorf","EMAIL":"philipp.westhoff@hhu.de","PHONE":"+49 211-8110926"},

"STUDY":{"STUDY_TITLE":"Contribution of sugar transporters to spatial microbiota colonization along the longitudinal root axis of Arabidopsis","STUDY_SUMMARY":"Longitudinal gut-axes of animals show spatial heterogeneity of microbiota related to physiological differentiation. Plant roots show functional heterogeneity in cellular architecture, transcriptome, metabolic states, and immunity. We hypothesized that axial differentiation impacts spatial colonization by rhizobiota along the root axis. We developed two growth systems, ArtSoil and CD-Rhizotrons, to dissect Arabidopsis thaliana roots into three segments. We identified distinct rhizobiota communities in the segments, supporting spatial microbiota differentiation along the axis. Root metabolite profiling revealed differential enrichment and specificity. Correlation analyses point to strong reliance of rhizobiota on carbohydrate supply from the host. Bioinformatic analyses and GUS histochemistry indicate sugar and/or microbe-induced accumulation of SWEET2, 4, and 12 sugar uniporters. Profiling of root-segments in sweet mutants showed impaired spatial rhizobiota arrangement. Correlation analysis revealed complex interconnected metabolite-rhizobiota networks. This work uncovers interdependency between root physiology and microbiota colonization and a contribution of SWEETs to shaping local adaptation of root microbiota.","INSTITUTE":"Heinrich Heine University Düsseldorf","LAST_NAME":"Westhoff","FIRST_NAME":"Philipp","ADDRESS":"Universitätsstr. 1 40225 Düsseldorf","EMAIL":"philipp.westhoff@hhu.de","PHONE":"+49 211-8110926"},

"SUBJECT":{"SUBJECT_TYPE":"Plant","SUBJECT_SPECIES":"Arabidopsis thaliana","TAXONOMY_ID":"3702"},
"SUBJECT_SAMPLE_FACTORS":[
{
"Subject ID":"-",
"Sample ID":"20-0029_120",
"Factors":{"region":"2cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"11.9","RAW_FILE_NAME":"220512_qtof_05.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_121",
"Factors":{"region":"4cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"23.3","RAW_FILE_NAME":"220512_qtof_06.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_122",
"Factors":{"region":"6cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"25","RAW_FILE_NAME":"220512_qtof_07.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_123",
"Factors":{"region":"2cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"18.4","RAW_FILE_NAME":"220512_qtof_08.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_124",
"Factors":{"region":"4cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"16.6","RAW_FILE_NAME":"220512_qtof_09.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_125",
"Factors":{"region":"4cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"17.2","RAW_FILE_NAME":"220512_qtof_10.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_126",
"Factors":{"region":"6cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"19.3","RAW_FILE_NAME":"220512_qtof_11.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_127",
"Factors":{"region":"6cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"15.1","RAW_FILE_NAME":"220512_qtof_12.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_128",
"Factors":{"region":"whole","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"23","RAW_FILE_NAME":"220512_qtof_15.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_129",
"Factors":{"region":"whole","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"21.5","RAW_FILE_NAME":"220512_qtof_16.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_130",
"Factors":{"region":"2cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"10.4","RAW_FILE_NAME":"220512_qtof_17.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_131",
"Factors":{"region":"4cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"17.3","RAW_FILE_NAME":"220512_qtof_18.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_132",
"Factors":{"region":"6cm","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"12.7","RAW_FILE_NAME":"220512_qtof_19.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_133",
"Factors":{"region":"whole","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"17.9","RAW_FILE_NAME":"220512_qtof_20.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_145",
"Factors":{"region":"whole","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"23.5","RAW_FILE_NAME":"220512_qtof_34.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_146",
"Factors":{"region":"whole","genotype":"WT"},
"Additional sample data":{"Sample.weight.[mg]":"20.4","RAW_FILE_NAME":"220512_qtof_35.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_176",
"Factors":{"region":"whole","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"12.1","RAW_FILE_NAME":"221019_sq_11.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_177",
"Factors":{"region":"2cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"7","RAW_FILE_NAME":"221019_sq_12.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_178",
"Factors":{"region":"4cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"7.4","RAW_FILE_NAME":"221019_sq_13.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_179",
"Factors":{"region":"6cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"5","RAW_FILE_NAME":"221019_sq_14.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_180",
"Factors":{"region":"2cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"9.4","RAW_FILE_NAME":"221019_sq_17.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_181",
"Factors":{"region":"4cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"10.2","RAW_FILE_NAME":"221019_sq_18.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_182",
"Factors":{"region":"6cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"10.6","RAW_FILE_NAME":"221019_sq_19.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_183",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"10.8","RAW_FILE_NAME":"221019_sq_20.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_184",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"14.6","RAW_FILE_NAME":"221019_sq_21.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_185",
"Factors":{"region":"2cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"13.4","RAW_FILE_NAME":"221019_sq_22.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_186",
"Factors":{"region":"4cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"7.8","RAW_FILE_NAME":"221019_sq_23.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_187",
"Factors":{"region":"6cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"17.5","RAW_FILE_NAME":"221019_sq_24.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_188",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"21.6","RAW_FILE_NAME":"221019_sq_25.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_189",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"15.7","RAW_FILE_NAME":"221019_sq_26.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_190",
"Factors":{"region":"2cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"5.6","RAW_FILE_NAME":"221019_sq_29.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_191",
"Factors":{"region":"4cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"9.4","RAW_FILE_NAME":"221019_sq_30.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_192",
"Factors":{"region":"6cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"11.6","RAW_FILE_NAME":"221019_sq_31.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_193",
"Factors":{"region":"whole","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"7.5","RAW_FILE_NAME":"221019_sq_32.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_194",
"Factors":{"region":"2cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"8.1","RAW_FILE_NAME":"221019_sq_33.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_195",
"Factors":{"region":"4cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"13.2","RAW_FILE_NAME":"221019_sq_34.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_196",
"Factors":{"region":"6cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"11.2","RAW_FILE_NAME":"221019_sq_35.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_197",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"23.3","RAW_FILE_NAME":"221019_sq_36.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_198",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"16.8","RAW_FILE_NAME":"221019_sq_37.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_199",
"Factors":{"region":"2cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"18.2","RAW_FILE_NAME":"221020_sq_05.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_200",
"Factors":{"region":"4cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"22.8","RAW_FILE_NAME":"221020_sq_06.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_201",
"Factors":{"region":"4cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"14.2","RAW_FILE_NAME":"221020_sq_07.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_202",
"Factors":{"region":"6cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"9.2","RAW_FILE_NAME":"221020_sq_08.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_203",
"Factors":{"region":"6cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"17.2","RAW_FILE_NAME":"221020_sq_09.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_204",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"32.2","RAW_FILE_NAME":"221020_sq_10.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_205",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"16.2","RAW_FILE_NAME":"221020_sq_11.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_206",
"Factors":{"region":"2cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"7","RAW_FILE_NAME":"221020_sq_12.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_207",
"Factors":{"region":"4cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"8.6","RAW_FILE_NAME":"221020_sq_13.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_208",
"Factors":{"region":"6cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"11.8","RAW_FILE_NAME":"221020_sq_14.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_209",
"Factors":{"region":"whole","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"12.8","RAW_FILE_NAME":"221020_sq_15.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_210",
"Factors":{"region":"whole","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"16.6","RAW_FILE_NAME":"221020_sq_16.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_154",
"Factors":{"region":"6cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"15.7","RAW_FILE_NAME":"221020_sq_19.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_155",
"Factors":{"region":"4cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"9.9","RAW_FILE_NAME":"221020_sq_20.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_156",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"18.1","RAW_FILE_NAME":"221020_sq_21.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_157",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"17","RAW_FILE_NAME":"221020_sq_22.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_158",
"Factors":{"region":"2cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"11.3","RAW_FILE_NAME":"221020_sq_23.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_159",
"Factors":{"region":"4cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"5.5","RAW_FILE_NAME":"221020_sq_24.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_170",
"Factors":{"region":"2cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"11","RAW_FILE_NAME":"221020_sq_27.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_171",
"Factors":{"region":"4cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"9.5","RAW_FILE_NAME":"221020_sq_28.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_172",
"Factors":{"region":"6cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"7.5","RAW_FILE_NAME":"221020_sq_29.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_173",
"Factors":{"region":"4cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"10.3","RAW_FILE_NAME":"221020_sq_30.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_174",
"Factors":{"region":"6cm","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"10","RAW_FILE_NAME":"221020_sq_31.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_175",
"Factors":{"region":"whole","genotype":"sweet11;12"},
"Additional sample data":{"Sample.weight.[mg]":"17.4","RAW_FILE_NAME":"221020_sq_32.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_150",
"Factors":{"region":"2cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"9","RAW_FILE_NAME":"221025_sq_05.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_151",
"Factors":{"region":"4cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"16","RAW_FILE_NAME":"221025_sq_06.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_152",
"Factors":{"region":"6cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"6.8","RAW_FILE_NAME":"221025_sq_07.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_153",
"Factors":{"region":"whole","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"20","RAW_FILE_NAME":"221025_sq_08.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_160",
"Factors":{"region":"6cm","genotype":"sweet2"},
"Additional sample data":{"Sample.weight.[mg]":"8.8","RAW_FILE_NAME":"221025_sq_11.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_161",
"Factors":{"region":"2cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"9.2","RAW_FILE_NAME":"221025_sq_12.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_162",
"Factors":{"region":"4cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"10.3","RAW_FILE_NAME":"221025_sq_13.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_163",
"Factors":{"region":"6cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"12.6","RAW_FILE_NAME":"221025_sq_14.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_164",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"12.3","RAW_FILE_NAME":"221025_sq_15.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_165",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"16.6","RAW_FILE_NAME":"221025_sq_16.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_166",
"Factors":{"region":"whole","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"23","RAW_FILE_NAME":"221025_sq_17.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_167",
"Factors":{"region":"2cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"11.5","RAW_FILE_NAME":"221025_sq_18.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_168",
"Factors":{"region":"4cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"22.6","RAW_FILE_NAME":"221025_sq_19.cdf"}
},
{
"Subject ID":"-",
"Sample ID":"20-0029_169",
"Factors":{"region":"6cm","genotype":"sweet4"},
"Additional sample data":{"Sample.weight.[mg]":"24.8","RAW_FILE_NAME":"221025_sq_20.cdf"}
}
],
"COLLECTION":{"COLLECTION_SUMMARY":"Approximately 25-35 sterilized A. thaliana seeds were sown in a row on ArtSoil and grown for 3 weeks. After 3 weeks, the roots were measured (2, 4, and 6 cm from the root tip) and harvested by slicing with a scalpel. The roots were rinsed in distilled water, and blotted dry on Whatman filter papers before they were weighed and kept in 1.5 ml microcentrifuge tubes containing 2 metal beads each. The samples were flash frozen in liquid nitrogen and stored in -80°C until the extraction process.","SAMPLE_TYPE":"Arabidopsis thaliana"},

"TREATMENT":{"TREATMENT_SUMMARY":"no treatment"},

"SAMPLEPREP":{"SAMPLEPREP_SUMMARY":"For metabolite extraction, 0.5 mL of chilled extraction buffer (2:5:2 ratio of ddH2O: methanol: chloroform containing 5µM ribitol as internal standard) was added into each root sample and vortex for 20 secs. Metal beads in the tubes were removed. Sample tubes were shaken on a rotary shaker for 30 mins at 4°C. The samples were then centrifuged at 20, 000g for 5 mins at 4°C. After centrifugation, 0.5 ml of supernatant was carefully aspirated and transferred to a clean 1.5 ml microcentrifuge tube. Samples were stored at-80°C. For GC-MS analysis 30µl of sample were dried by vacuum centrifugation in glass inlet tubes. Dried samples were derivatized according to (Gu et al. 2012 DOI:10.1039/c2ib00109h) and measured as described (Shim et al. 2019 DOI:10.3389/fpls.2019.01726)"},

"CHROMATOGRAPHY":{"CHROMATOGRAPHY_SUMMARY":"Dried samples were derivatized according to (Gu et al. 2012 DOI:10.1039/c2ib00109h) and measured as described (Shim et al. 2019 DOI:10.3389/fpls.2019.01726)","CHROMATOGRAPHY_TYPE":"GC","INSTRUMENT_NAME":"Agilent 7890B","COLUMN_NAME":"Agilent HP5-MS (30m x 0.25mm, 0.25um)","SOLVENT_A":"N/A for GC","SOLVENT_B":"N/A for GC","SOLVENT_C":"N/A for GC","FLOW_GRADIENT":"N/A for GC","FLOW_RATE":"N/A for GC","COLUMN_TEMPERATURE":"N/A for GC"},

"ANALYSIS":{"ANALYSIS_TYPE":"MS"},

"MS":{"INSTRUMENT_NAME":"Agilent 7200 QTOF","INSTRUMENT_TYPE":"QTOF","MS_TYPE":"EI","ION_MODE":"POSITIVE","MS_COMMENTS":"Metabolites were ionized with an electron impact source at 70V and 200 °C source temperature and recorded in a mass range of m/z 60 to m/z 800 at 20 scans per second"},

"MS_METABOLITE_DATA":{
"Units":"Relative intensity",

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