AtNAP, a NAC family transcription factor, has an important role in leaf senescence
Article first published online: 21 APR 2006
The Plant Journal
Volume 46, Issue 4, pages 601–612, May 2006
How to Cite
Guo, Y. and Gan, S. (2006), AtNAP, a NAC family transcription factor, has an important role in leaf senescence. The Plant Journal, 46: 601–612. doi: 10.1111/j.1365-313X.2006.02723.x
- Issue published online: 21 APR 2006
- Article first published online: 21 APR 2006
- Received 9 December 2005; revised 24 January 2006; accepted 25 January 2006.
- leaf senescence;
- transcription factor;
- kidney bean;
Leaf senescence is a unique developmental process that is characterized by massive programmed cell death and nutrient recycling. The underlying molecular regulatory mechanisms are not well understood. Here we report the functional analysis of AtNAP, a gene encoding a NAC family transcription factor. Expression of this gene is closely associated with the senescence process of Arabidopsis rosette leaves. Leaf senescence in two T-DNA insertion lines of this gene is significantly delayed. The T-DNA knockout plants are otherwise normal. The mutant phenotype can be restored to wild-type by the intact AtNAP, as well as by its homologs in rice and kidney bean plants that are also upregulated during leaf senescence. Furthermore, inducible overexpression of AtNAP causes precocious senescence. These data strongly suggest that AtNAP and its homologs play an important role in leaf senescence in Arabidopsis and possibly in other plant species.