Plants having enhanced yield-related traits and a method for...

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/82 (2006.01) C07K 14/415 (2006.01)

Patent

CA 2685223

The present invention relates generally to the field of molecular biology and concerns a method for enhancing yield-related traits and/or improving various plant growth characteristics by modulating expression in a plant of a nucleic acid encoding a GRP (Growth Regulating Protein). The GRP is selected from a LOB-domain comprising protein (LOB: Lateral Organ Boundaries), herein abbreviated as LBD polypeptide, a JMJC (JUMONJI-C) polypeptide, a CKI (Casein Kinase I) polypeptide, a bHLH11-like (basic Helix-Loop-Helix 11 ) protein, a plant homeodomain finger-homeodomain (PHDf-HD) polypeptide, an ASR (abscisic acid-, stress-, and ripening-induced) polypeptide and/or a Squamosa promoter binding protein-like 1 1 (SPL11 ) transcription factor polypeptide. The present invention also concerns plants having modulated expression of a nucleic acid encoding a GRP, which plants have improved growth characteristics relative to corresponding wild type plants or other control plants. The invention also provides novel GRP nucleic acids and GRP polypeptides as well as constructs useful in the methods of the invention.

L'invention concerne généralement le domaine de la biologie moléculaire et se rapporte à un procédé qui permet de renforcer des traits liés au rendement et/ou d'améliorer diverses caractéristiques de croissance des plantes en modulant l'expression chez une plante d'un acide nucléique codant une protéine régulatrice de croissance (GRP). La protéine GRP est choisie entre une protéine comprenant un domaine LOB (LOB: Lateral Organ Boundaries ou "limites des organes latéraux"), abrégée ci-après sous polypeptide LBD, un polypeptide JMJC (JUMONJI-C), un polypeptide CKI (Caséine Kinase I), une protéine de type bHLH11 (basic Helix-Loop-Helix 11ou "hélice-boucle-hélice de base 11"), un polypeptide de plante à homéodomaine à doigt-homéodomaine (PHDf-HD), un polypeptide ASR (abscisic acid-, stress-, and ripening-induced ou "induit par l'acide abscisique, le stress et la maturation) et/ou un polypeptide de facteur de transcription d'une protéine de liaison de promoteur Squamosa de type 11 (SPL11 ). L'invention se rapporte également à des plantes possédant une expression modulée d'un acide nucléique codant une protéine GRP, plantes qui possèdent des caractéristiques de croissance améliorée par rapport aux plantes de type sauvage correspondantes ou par rapport à d'autres plantes témoins. L'invention se rapporte également à de nouveaux acides nucléiques et polypeptides GRP et à des produits de synthèse utilisés selon les procédés précités.

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