Plant Reactome Pathway Database - Plant Reactome Pathway Database

TAC1

Stable Identifier

R-OSA-9924533

Type

Protein [EntityWithAccessionedSequence]

Species

Oryza sativa

Synonyms

TAC1_ORYSJ

GO Cellular Component

nucleoplasm (0005654)

Locations in the PathwayBrowser

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Summation

TILLER ANGLE CONTROL 1 (TAC1) is involved in the regulation of the tiller angle. It promotes horizontal shoot growth. TAC1 and LAZY1 play opposite functions in the regulation of tiller growth angle. The overexpression of TAC1 results in an enlarged tiller angle, thus a spread-out plant architecture. The cultivated japonica rice genotypes contain a point mutation in the 3'-splice site of TAC1's fourth intron (?GGGA?) that suppresses TAC1 expression, causing a compact plant architecture (Zhu et al., 2021). In contrast, wild rice and several indica rice accessions (with spread-out tillers) contain ?AGGA? in the 3'-splice site of TAC1's fourth intron (Dong et al., 2016). Transgenic RNAi plants that show silencing of TAC1 exhibit erect tillers with a very small tiller angle (Baisheng et al., 2007). TAC1 promoter has binding sites for the three TFs including ARF15, OsHOX1, and OsHOX28 (Naithani et al. (2024);analysis conducted by the Plant Reactome Biocurator)

Literature References

PubMed ID	Title	Journal	Year
33067639	LAZY1 Controls Tiller Angle and Shoot Gravitropism by Regulating the Expression of Auxin Transporters and Signaling Factors in Rice	Plant Cell Physiol	2021
27814357	A Novel Tiller Angle Gene, TAC3, together with TAC1 and D2 Largely Determine the Natural Variation of Tiller Angle in Rice Cultivars	PLoS Genet	2016
17908158	TAC1, a major quantitative trait locus controlling tiller angle in rice	Plant J	2007