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Abstract Detail


Reproductive Development

Kolar, Jan [1], Matejickova, Lada [2], Senkova, Jana [2].

Abiotic stresses differentially affect flowering of Arabidopsis thaliana and Chenopodium rubrum.

The timing of flowering is crucial for plant reproductive success, especially in annual plants. It is conceivable that plants would react to unfavorable conditions by accelerated flowering, representing a sort of avoidance strategy - seeds are ideally suited for surviving stress conditions or for migrating to better habitats. We investigated the effects of several abiotic stresses on flower induction in two photoperiodically sensitive model plants: the long-day flowering Arabidopsis thaliana and the short-day species Chenopodium rubrum. Flowering of A. thaliana was accelerated by heat and by abrupt withdrawal of mineral nutrition, while drought, salinity, and continuous nutrient deficiency delayed flowering. C. rubrum flowering was stimulated by salinity and cold but suppressed by nutrient deficiency and heat. The flowering response to abiotic stress obviously depends on the type of stress applied and is species-specific. We have also noted ecotype differences among A. thaliana ecotypes. This research was supported by grant Nr. KJB600380510 from GAAV CR.


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1 - Institute of Experimental Botany, Laboratory of Biologically Active Substances, Rozvojova 263, Prague 6, 165 02, Czech Republic
2 - Institute of Experimental Botany, Laboratory of Biologically Active Substances

Keywords:
flowering
stress
Arabidopsis thaliana
Chenopodium rubrum.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P28044
Abstract ID:1655


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