title: Polysome Formation in Light-sensitive Common Purslane Seeds.
abstract: 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.
authors: United States Department of Agriculture, Agricultural Research Service, Southern Weed Science Laboratory, Stoneville, Mississippi 38776.
authors: B J
authors: BJ
authors: Reger
authors: G H
authors: GH
authors: Egley
authors: C R
authors: CR
authors: Swanson