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Tissue-specific signatures of metabolites and proteins in asparagus roots and exudates

Horticulture Research 2021年第1期8卷 1044-1057页

作者： Stefanie Doll roxana djalali farahani-kofoet Rita Zrenner Andrea Henze Katja Witzel Leibniz Institute of Plant Biochemistry Weinberg 306120 Halle/SaaleGermany Leibniz Institute of Vegetable and Ornamental Crops Theodor-Echtermeyer-Weg 114979 GroßbeerenGermany University of Potsdam Institute of Nutritional ScienceArthur-Scheunert-Allee 114-11614558 NuthetalGermany Present address:German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany

Comprehensive untargeted and targeted analysis of root exudate composition has advanced our understanding of rhizosphere ***,little is known about exudate spatial distribution and *** studied the specific metabolite signatures of asparagus root exudates,root outer(epidermis and exodermis),and root inner tissues(cortex and vasculature).The greatest differences were found between exudates and root *** total,263 non-redundant metabolites were identified as significantly differentially abundant between the three root fractions,with the majority being enriched in the root exudate and/or outer tissue and annotated as‘lipids and lipid-like molecules’or‘phenylpropanoids and polyketides’.Spatial distribution was verified for three selected compounds using MALDI-TOF mass spectrometry ***-specific proteome analysis related root tissue-specific metabolite distributions and rhizodeposition with underlying biosynthetic pathways and transport *** proteomes of root outer and inner tissues were spatially very distinct,in agreement with the fundamental differences between their functions and *** to KEGG pathway analysis,the outer tissue proteome was characterized by a high abundance of proteins related to‘lipid metabolism’,‘biosynthesis of other secondary metabolites’and‘transport and catabolism’,reflecting its main functions of providing a hydrophobic barrier,secreting secondary metabolites,and mediating water and nutrient *** more abundant in the inner tissue related to‘transcription’,‘translation’and‘folding,sorting and degradation’,in accord with the high activity of cortical and vasculature cell layers in growth-and development-related *** summary,asparagus root fractions accumulate specific *** expands our knowledge of tissue-specific plant cell function.

关键词： function outer signature

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