Impacts of contrasting light on bud burst and on RwMAX1 and RwMAX2 expression in rose

• Autorzy: Azri W. , Le Gourrierec J. , Demotes-Mainard S. , Huche-Thelier L. , Rabot A. , Guerin V. , Sakr S.
• Języki publikacji: EN

Abstrakty

EN

Bud burst is a crucial factor in plant architecture and is strongly induced by light. In Rosa sp., this light effect was correlated with the growth of axillary buds and RwMAX1 and RwMAX2 expression within buds. In this paper, we investigated whether strigolactone pathway is involved in the regulation of axillary bud in response to light intensity. Hence, young roses were subjected to two contrasting light intensity regimes: high/high and high/low. The phenotype was characterized in both conditions and the expression of RwMAX1 and RwMAX2 genes was measured in the basal, middle and apical parts of rose primary branch. Light treatments showed a strong impact on axillary bud. The percentage of bud burst was severely reduced in the treatment high/low compared to the treatment high/high in all branch parts. In addition, the expression of RwMAX1 and RwMAX2 was strongly inhibited by high/high light regime and was conversely correlated with the rate of bud burst. In in vitro-grown axillary buds supplied with sucrose, glucose and fructose, RwMAX1 expression was significantly stimulated whereas that of RwMAX2 was significantly inhibited. Our results suggest that although RwMAX1 and RwMAX2 expression can be regulated by light, this expression does not explain the ability of bud burst.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2015
• Tom: 37
• Numer: 02
• Opis fizyczny: Article: 30 [9 p.], fig.,ref.

Twórcy

autor

Azri W.

• INRA, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universite d’Angers), SFR 149 QUASAV, 44071 Beaucouze, France
• Laboratoire de Physiologie Moleculaire des Plantes, Centre de Biotechnologie, B.P. 901, 2050 Hammam Lift, Tunisia

autor

Le Gourrierec J.

• Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universite d’Angers), Universite d’Angers, SFR 149 QUASAV, 49045 Angers, France

autor

Demotes-Mainard S.

• INRA, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universite d’Angers), SFR 149 QUASAV, 44071 Beaucouze, France

autor

Huche-Thelier L.

• INRA, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universite d’Angers), SFR 149 QUASAV, 44071 Beaucouze, France

autor

Rabot A.

• Agrocampus-Ouest, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universited’Angers), SFR 149 QUASAV, 49045 Angers, France

autor

Guerin V.

• INRA, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universite d’Angers), SFR 149 QUASAV, 44071 Beaucouze, France

autor

Sakr S.

• Agrocampus-Ouest, Institut de Recherche en Horticulture et Semences (INRA, Agrocampus-Ouest, Universited’Angers), SFR 149 QUASAV, 49045 Angers, France

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Identyfikatory

DOI

10.1007/s11738-014-1764-9