Recent research progress on the functional roles and regulatory mechanisms of SMALL AUXIN UP RNA gene family
2018
Lee, S.H., Mokwon University, Daejeon, Republic of Korea
The plant hormone auxin regulates the overall metabolic processes essential for plant growth and development. Auxin signaling is mediated by early auxin response genes, which are classified into three major families: AUXIN/INDOLE ACETIC ACID (AUX/IAA), GRETCHEN HAGEN3 (GH3) and SMALL AUIN UP RNA (SAUR). The SAUR gene family is the largest family among early auxin response genes and encodes the small and highly unstable gene products. The functional roles of SAUR genes have remained unclear for many years. The traditional genetic and molecular studies on the SAUR functions have been hampered by their likely genetic redundancy and tandem arrays of highly related genes in the plant genome, together with the molecular characteristics of SAUR. However, recent studies have suggested possible roles of SAUR in a variety of tissues and developmental stages in accordance with the novel approaches such as gain-of-function and RNA silencing techniques. In this review, the recent research progress on the functional roles and regulatory mechanisms of SAUR and a set of possible future works are discussed.
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