Metabolomics of laminae and midvein during leaf senescence and source-sink metabolite management in Brassica napus L. leaves.

ABSTRACT: Leaf senescence is a long developmental process important for nutrient management and for source to sink remobilization. Constituents of the mesophyll cells are progressively degraded to provide nutrients to the rest of the plant. Up to now, studies on leaf senescence have not paid much attention to the role of the different leaf tissues. In the present study, we dissected leaf laminae from the midvein to perform metabolite profiling. The laminae mesophyll cells are the source of nutrients, and in C3 plants they contain Rubisco as the most important nitrogen storage pool. Veins, rich in vasculature, are the place where all the nutrients are translocated, and sometimes interconverted, before being exported through the phloem or the xylem. The different metabolic changes we observed in lamin

SUBMITTER: Clement G 

PROVIDER: S-EPMC5853214 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature