Plant Reactome Pathway Database - Plant Reactome Pathway Database

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created	[InstanceEdit:9924415]
dbId	9924577
displayName	The expression of SMALL AUXIN UP-RNA 39 (SAUR 39) is positi...
literatureReference	[LiteratureReference:9924459] Natural Variations at TIG1 Encoding a TCP Transcription Factor Contribute to Plant Architecture Domestication in Rice [LiteratureReference:9924539] SAUR39, a small auxin-up RNA gene, acts as a negative regulator of auxin synthesis and transport in rice
schemaClass	Summation
text	The expression of SMALL AUXIN UP-RNA 39 (SAUR 39) is positively regulated by the TIG1 transcription factor. TiG1 promotes cell elongation and increases the tiller angle in rice (Zhang et al., 2019). The SAUR39 gene is expressed at higher levels in older leaves and low levels in inflorescence and roots. SAUR39 gene showed rapid induction by transient change in different environmental factors, including auxin, nitrogen, salinity, cytokinin, and anoxia. Plants over-expressing SAUR39 display reduced shoot and root growth, altered shoot morphology, reduced size of vascular tissue, low yield, and decreased basipetal auxin transport (Kant et al., 2009). Thus, it is a negative regulator of auxin synthesis and transport. The SAUR39 gene has an auxin-responsive element in its 5? untranslated region.

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