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Tubulin and kinesin-like protein in phloem of Apium graveolens

Yan Longfei, Liu Guoqin

College of Biological Sciences, Beijing Agricultural University. Beijing 100094

Abstract

Tubulin and kinesin-like ptoteins have been identified in the phloem of Apium graveolems, based on immuno-fluo rescence labeling and immunoblotting. Microtubules are distributed along the length of the sieve tubes, and the molecular weight of tubulin weas found to be 55 kD. Kinesin-like proteins are present mainly on the irregular cytoplasmic particles (or aggregates) in the sieve tubes, and the heavy chain of them is found to be 100kD. It is suggested that the kinesin-like proteins in the phloem of Apium graveolens mya play the role of motor in transporting vesicles as kinesin in animal nerve cells.

Key words: Kinesin-like protein;Tubulin;Phloem;Molecular motor

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Citing This Article：

Yan Longfei, Liu Guoqin. Tubulin and kinesin-like protein in phloem of Apium graveolens. Acta Physiol Sin 1995; 47 (4): (in Chinese with English abstract).