Gibberellin Signaling Repressor LlDELLA1 Controls the Flower and Pod Development of Yellow Lupine (Lupinus luteus L.)

International Journal of Molecular Sciences
Katarzyna Marciniak, Krzysztof Przedniczek

Abstract

Precise control of generative organ development is of great importance for the productivity of crop plants, including legumes. Gibberellins (GAs) play a key role in the regulation of flowering, and fruit setting and development. The major repressors of GA signaling are DELLA proteins. In this paper, the full-length cDNA of LlDELLA1 gene in yellow lupine (Lupinus luteus L.) was identified. Nuclear-located LlDELLA1 was clustered in a second phylogenetic group. Further analyses revealed the presence of all conserved motifs and domains required for the GA-dependent interaction with Gibberellin Insensitive Dwarf1 (GID1) receptor, and involved in the repression function of LlDELLA1. Studies on expression profiles have shown that fluctuating LlDELLA1 transcript level favors proper flower and pod development. Accumulation of LlDELLA1 mRNA slightly decreases from the flower bud stage to anther opening (dehiscence), while there is rapid increase during pollination, fertilization, as well as pod setting and early development. LlDELLA1 expression is downregulated during late pod development. The linkage of LlDELLA1 activity with cellular and tissue localization of gibberellic acid (GA3) offers a broader insight into the functioning of the ...Continue Reading

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Citations

Apr 19, 2021·BMC Plant Biology·Carmen García-FernándezJuan Jose Ferreira

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Datasets Mentioned

BETA
PRJNA285604
SRX1069734
MN956900

Methods Mentioned

BETA
RNA-Seq
glycosylation
PCR
Assay

Software Mentioned

STRIDE
FastPCR
MEME
ProtComp
BLAST
VMD
PhyML
DiAlign

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