Genetyczna kontrola kwitnienia roślin okrytonasiennych

• Authors: Andrzej Tretyn , Jan Kopcewicz

Title variants

EN

Genetic control of flowering of angiosperm plants

• Languages of publication: PL EN

Abstracts

EN

Summary Plants have developed mechanisms to integrate both endogenous and environmental cues for regulation of flowering time. When environmental and physiological (e.g. photoperiod, temperature) (e.g. stage of development) conditions are appropriate plants undergo the floral transition and become reproductive. The timing of flowering initiation depends on the balanced expression of many different genes that are regulated by both endogenous and environmental factors. As a result of physiological, genetic, and molecular analysis of Arabidopsis thaliana mutants altered in flowering time the existence of a long-promotion pathway, a gibberellic-acid promotion pathway, as well as vernalization and autonomous pathway were discovered and characterized. A few dozen of genes invilved in flower induction of Arabidopsis were identified. Some of them can integrate two or three flowering pathways. Floral repression is likely to be the principal mechanism for maintaining vegetative development. Floral repressor inhibit the floral signaling pathways at various levels. Some of genes involved in vernalization and photoperiodic flower induction encode putative chromatin-associated proteins. They probably function as epigenetic silencers that repress promotion of flowering, and thereby maintain vegetative growth. The complete genome sequences of two plant species; Arabidopsis thaliana (long-day dicot) and Oryza sativa (short-day monocot) have been published recently. Since that time, comparative genomics andmolecular genetics on photoperiod-induced flowering process became possible. Using this approach some differences between long- and short-day plants were established at the molecular level.

• Journal: Kosmos
• Year: 2003
• Volume: 52
• Issue: 4
• Pages: 379-398

Dates

published

2003

Contributors

author

Andrzej Tretyn

• Zakład Biotechnologii, Instytut Biologii Ogólnej i Molekularnej, Uniwersytet Mikołaja Kopernika, Gagarina 9, 87-100 Toruń, Polska

author

Jan Kopcewicz

• Zakład Fizjologii i Biologii Molekularnej Roślin, Instytut Biologii Ogólnej i Molekularnej, Uniwersytet Mikołaja Kopernika, Gagarina 9, 87-100 Toruń, Polska

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