Polysome Formation in Light-sensitive Common Purslane Seeds | Zendy

Bonnie J. Reger | Zendy; G. H. Egley | Zendy; C. R. Swanson | Zendy

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Polysome Formation in Light-sensitive Common Purslane Seeds

Author(s) -

Bonnie J. Reger,

G. H. Egley,

C. R. Swanson

Publication year - 1975

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.55.5.928

Subject(s) - polysome , radicle , imbibition , coleoptile , germination , darkness , biology , elongation , botany , ribosome , biophysics , chemistry , microbiology and biotechnology , biochemistry , rna , materials science , ultimate tensile strength , gene , metallurgy

Common purslane (Portulaca oleracea L.) seeds show light-controlled dormancy. Ribosome profiles from dark-incubated seeds consist of 22 to 26% polysomes. Light induces germination and stimulates polysome formation during the 12-hour lag period preceding radicle protrusion. Polysome levels increase to 29, 35, and 41% with exposure to 3, 6, and 9 hours of light, respectively. Although polysomes form on imbibition in the dark, 6 hours of light stimulates a significant increase in polysome formation which is probably related to early stages of radicle elongation.

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