Analysis of xylem sap proteins from Brassica napus.

ABSTRACT:

Background

Substance transport in higher land plants is mediated by vascular bundles, consisting of phloem and xylem strands that interconnect all plant organs. While the phloem mainly allocates photoassimilates, the role of the xylem is the transport of water and inorganic nutrients from roots to all aerial plant parts. Only recently it was noticed that in addition to mineral salts, xylem sap contains organic nutrients and even proteins. Although these proteins might have important impact on the performance of above-ground organs, only a few of them have been identified so far and their physiological functions are still unclear.

Results

We used root-pressure xylem exudate, collected from cut Brassica napus stems, to extract total proteins. These protein preparations were th

SUBMITTER: Kehr J 

PROVIDER: S-EPMC1182380 | biostudies-literature | 2005 Jun

REPOSITORIES: biostudies-literature