PMID:23386682

Citation	Valdivia, ER, Herrera, MT, Gianzo, C, Fidalgo, J, Revilla, G, Zarra, I and Sampedro, J (2013) Regulation of secondary wall synthesis and cell death by NAC transcription factors in the monocot Brachypodium distachyon. J. Exp. Bot. 64:1333-43
Abstract	In several dicotyledonous species, NAC transcription factors act as master switches capable of turning on programmes of secondary cell-wall synthesis and cell death. This work used an oestradiol-inducible system to overexpress the NAC transcription factor BdSWN5 in the monocot model Brachypodium distachyon. This resulted in ectopic secondary cell-wall formation in both roots and shoots. Some of the genes upregulated in the process were a secondary cell-wall cellulose synthase (BdCESA4), a xylem-specific protease (BdXCP1) and an orthologue of AtMYB46 (BdMYB1). While activation of BdMYB1 may not be direct, this study showed that BdSWN5 is capable of transactivating the BdXCP1 promoter through two conserved binding sites. In the course of Brachypodium development, the BdXCP1 promoter was observed to be active in all types of differentiating tracheary elements. Together, these results suggest that Brachypodium SWNs can act as switches that turn on secondary cell-wall synthesis and programmed cell death.
Links	PubMed PMC3598421 Online version:10.1093/jxb/ers394
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Annotations

Gene product	Qualifier	GO Term	Evidence Code	with/from	Aspect	Extension	Notes	Status
ARATH:CESA5		GO:0009833: primary cell wall biogenesis	ECO:0000250:	UniProtKB:Q94JQ6	P		Supplementary Figure 1 shows phylogenetic tree of CESA genes based on protein sequences of Arabidopsis, rice, and Brachypodium.	complete CACAO 8125
ARATH:CESA5	involved_in	GO:0009833: plant-type primary cell wall biogenesis	ECO:0000250: sequence similarity evidence used in manual assertion	UniProtKB:Q94JQ6	P		Seeded From UniProt	complete
BRADI:I1J3T2		GO:1901348: positive regulation of secondary cell wall biogenesis	ECO:0000315:		P		Figure 4: Inducible overexpression of SWN5 causes ectopic cell-wall formation	complete CACAO 7708
BRADI:I1J3T2	involved_in	GO:1901348: positive regulation of secondary cell wall biogenesis	ECO:0000315: mutant phenotype evidence used in manual assertion		P		Seeded From UniProt	complete
ARATH:CESAA		GO:0009833: primary cell wall biogenesis	ECO:0000250:	UniProtKB:O48946	P		Supplementary Figure 1 shows phylogenetic tree of CESA genes based on protein sequences of Arabidopsis, rice, and Brachypodium.	complete CACAO 8123
ARATH:CESAA	involved_in	GO:0009833: plant-type primary cell wall biogenesis	ECO:0000250: sequence similarity evidence used in manual assertion	UniProtKB:O48946	P		Seeded From UniProt	complete

References

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