Display options
Cite
Runkle ES, Heins RD, Cameron AC, et al. Photocontrol of flowering and stem extension of the intermediate-day plant Echinacea purpurea. Physiol Plant. 2001;112(3):433-441doi: 10.1034/j.1399-3054.2001.1120318.x.
Runkle, E. S., Heins, R. D., Cameron, A. C., & Carlson, W. H. (2001). Photocontrol of flowering and stem extension of the intermediate-day plant Echinacea purpurea. Physiologia plantarum, 112(3), 433-441. https://doi.org/10.1034/j.1399-3054.2001.1120318.x
Runkle, Erik S., et al. "Photocontrol of flowering and stem extension of the intermediate-day plant Echinacea purpurea." Physiologia plantarum vol. 112,3 (2001): 433-441. doi: https://doi.org/10.1034/j.1399-3054.2001.1120318.x
Runkle ES, Heins RD, Cameron AC, Carlson WH. Photocontrol of flowering and stem extension of the intermediate-day plant Echinacea purpurea. Physiol Plant. 2001 Jul;112(3):433-441. doi: 10.1034/j.1399-3054.2001.1120318.x. PMID: 11473702.
Copy Download .nbib Format: NLM
Share it on

Physiol Plant. 2001 Jul;112(3):433-441. doi: 10.1034/j.1399-3054.2001.1120318.x.

Photocontrol of flowering and stem extension of the intermediate-day plant Echinacea purpurea.

Physiologia plantarum

Erik S. Runkle, Royal D. Heins, Arthur C. Cameron, William H. Carlson

Affiliations

  1. Department of Horticulture, Michigan State University, East Lansing, MI 48824-1325, USA.

PMID: 11473702 DOI: 10.1034/j.1399-3054.2001.1120318.x

Abstract

Intermediate-day plants (IDP) flower most rapidly and completely under intermediate photoperiods (e.g., 12-14 h of light), but few species have been identified and their flowering responses are not well understood. We identified Echinacea purpurea Moench as an IDP and, based on our results, propose a novel mechanism for flowering of IDP. Two genotypes of E. purpurea ('Bravado' and 'Magnus') flowered most completely (>/=79%) and rapidly and at the youngest physiological age under intermediate photoperiods of 13-15 h. Few (/=230% as the photoperiod or NI duration increased, until plants received a saturating duration (at 14 or 1 h, respectively). Flowering was inhibited when 16-h photoperiods were deficient in red (R, 600-700 nm) light, and was promoted when photoperiods were deficient in far-red (FR, 700-800 nm) light. Because of our results, we propose the flowering behavior of IDP such as E. purpurea is composed of two mechanisms: a light-dependent response operating through light-labile (type I) phytochrome in which flowering is inhibited by an LD, and a light-stable (type II) phytochrome (i.e., phyB, D and E) response in which flowering is promoted by a short-night.

Publication Types