- Tytuł:
-
Genetyczna kontrola kwitnienia roślin okrytonasiennych
Genetic control of flowering of angiosperm plants - Autorzy:
-
Tretyn, Andrzej
Kopcewicz, Jan - Powiązania:
- https://bibliotekanauki.pl/articles/1201660.pdf
- Data publikacji:
- 2003
- Wydawca:
- Polskie Towarzystwo Przyrodników im. Kopernika
- Opis:
- 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.
- Źródło:
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Kosmos; 2003, 52, 4; 379-398
0023-4249 - Pojawia się w:
- Kosmos
- Dostawca treści:
- Biblioteka Nauki