2022
DOI: 10.1093/plphys/kiac406
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GA signaling expands: The plant UBX domain-containing protein 1 is a binding partner for the GA receptor

Abstract: The plant UBX-domain containing protein 1, PUX1, functions as a negative regulator of gibberellin (GA) signaling. GAs are plant hormones that stimulate seed germination, the transition to flowering, and cell elongation and division. Loss of Arabidopsis (Arabidopsis thaliana) PUX1 resulted in a “GA-overdose” phenotype including early flowering, increased stem and root elongation, and partial resistance to the GA-biosynthesis inhibitor paclobutrazol during seed germination and root elongation. Furthermore, GA ap… Show more

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Cited by 7 publications
(3 citation statements)
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“…Mutations in GID1b can increase stem elongation or increase seed germination in the dark or in under dim lighting suggesting that GID1b negatively regulates GA signaling under some conditions ( Griffiths et al., 2006 ; Ge and Steber, 2018 ; Hauvermale and Steber, 2020 ). Future work will need to investigate whether GID1b negatively regulates germination and plant growth via DELLA repressors or via the recently identified GID1-interacting protein PUX1 (Plant UBX domain containing protein 1) ( Hauvermale et al., 2022 ).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Mutations in GID1b can increase stem elongation or increase seed germination in the dark or in under dim lighting suggesting that GID1b negatively regulates GA signaling under some conditions ( Griffiths et al., 2006 ; Ge and Steber, 2018 ; Hauvermale and Steber, 2020 ). Future work will need to investigate whether GID1b negatively regulates germination and plant growth via DELLA repressors or via the recently identified GID1-interacting protein PUX1 (Plant UBX domain containing protein 1) ( Hauvermale et al., 2022 ).…”
Section: Discussionmentioning
confidence: 99%
“…Indeed, GA-insensitive mutants over-accumulate GA, likely as a feedback response to reduced signaling (Griffiths et al, 2006;Ariizumi et al, 2013). Mutations in SLY1 do not entirely block GA signaling due to a mechanism of GA signaling that does not require DELLA proteolysis but does require GA and GID1 protein (McGinnis et al, 2003;Ariizumi and Steber, 2007;Hauvermale et al, 2022). GA-insensitive sly1 mutants have elevated DELLA protein levels, a semi-dwarf stature, reduced male fertility, and increased seed dormancy.…”
Section: Introductionmentioning
confidence: 99%
“…The DELLA protein SLR1 was discovered in rice [53]. Five DELLA proteins were identified in Arabidopsis thaliana: RGA [54], GAI [55], RGL1 [56], RGL2 [57], and RGL3 [58]. Five DELLA proteins were identified in Brassica oleracea var.…”
Section: Regulate the Expression Of Genes Of Key Enzymes In Ja Signal...mentioning
confidence: 99%