Identification of phloem-specific proteinaSEOus structure heterogeneity in sieve element of Populus trichocarpa.

ABSTRACT: Phloem, an exceptional plant vascular tissue, facilitates the transport of photoassimilates, RNAs, and other signaling substances from the leaves to the roots throughout the plant. Among the specialized phloem cells are the conductive sieve elements (SEs), which are unique in that they remain alive despite lacking several cell organelles, including the nucleus, plastids, and most mitochondria. These SEs contain a specific proteinaceous structure composed of phloem-specific proteins (P-proteins), whose function is not yet fully understood. Various P-proteins have been characterized in broad range of model species, including Arabidopsis thaliana, and reported in Fabaceae and Cucurbitaceae plants. To date, only one P-protein has been identified in the model tree species Populus trichocarpa. G

SUBMITTER: Kulak K 

PROVIDER: S-EPMC11983751 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature