Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Identification of immunologically related proteins in sieve-tube exudate collected from monocotyledonous and dicotyledonous plants

Title data

Schobert, Christian ; Baker, Lucian ; Szederkényi, Judit ; Großmann, Pia ; Komor, Ewald ; Hayashi, Hiroaki ; Chino, Mitsuo ; Lucas, William J.:
Identification of immunologically related proteins in sieve-tube exudate collected from monocotyledonous and dicotyledonous plants.
In: Planta. Vol. 206 (1998) Issue 2 . - pp. 245-252.
ISSN 0032-0935
DOI: https://doi.org/10.1007/s004250050396

Abstract in another language

The mature, functional sieve-tube system in higher plants is dependent upon protein import from the companion cells to maintain a functional long-distance transport system. Soluble proteins present within the sieve-tube lumen were investigated by analysis of sieve-tube exudates which revealed the presence of distinct sets of polypeptides in seven monocotyledonous and dicotyledonous plant species. Antibodies directed against sieve-tube exudate proteins from Ricinus communis L. demonstrated the presence of shared antigens in the phloem sap collected from Triticum aestivum L., Oryza sativa L., Yucca filamentosa L., Cucurbita maxima Duch., Robinia pseudoacacia L. and Tilia platyphyllos L. Specific antibodies were employed to identify major polypeptides. Molecular chaperones related to Rubisco-subunit-binding protein and cyclophilin, as well as ubiquitin and the redox proteins, thioredoxin h and glutaredoxin, were detected in the sieve-tube exudate of all species examined. Actin and profilin, a modulator of actin polymerization, were also present in all analyzed phloem exudates. However, some proteins were highly species-specific, e.g. cystatin, a protease-inhibitor was present in R. communis but was not detected in exudates from other species, and orthologs of the well-known squash phloem lectin, phloem protein 2, were only identified in the sieve-tube exudate of R. communis and R. pseudoacacia. These findings are discussed in terms of the likely roles played by phloem proteins in the maintenance and function of the enucleate sieve-tube system of higher plants.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER22482
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Physiology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 09 Oct 2015 05:57
Last Modified: 09 Oct 2015 05:57
URI: https://eref.uni-bayreuth.de/id/eprint/20317