AtHAP5A modulates freezing stress resistance in Arabidopsis independent of the CBF pathway

Plant Signaling & Behavior
Haitao Shi, Zhulong Chan

Abstract

The heme-associated proteins (HAPs, also known as nuclear factor y, subunit A/B/C (NF-YA/B/C)) have been reported to bind specifically to DNA fragments containing CCAAT-box, however, the physiological functions and direct targets of these HAP proteins remain unclear in plants. In our recent study, we found that AtHAP5A and AtXTH21 positively modulated freezing stress resistance, and chromatin immunoprecipitation (ChIP) assay and genetic evidence indicated that AtHAP5A might act in the upstream of AtXTH21 in freezing stress. Moreover, AtHAP5A and AtXTH21 had significant effects on inhibiting cold stress-induced reactive oxygen species (ROS) accumulation and activating ABA-related genes' expression. Thus, a possible model that depicting AtHAP5A-mediated cold stress responses was proposed in this study, and we highlighted that AtHAP5A modulates freezing stress resistance in Arabidopsis through binding to CCAAT motif of AtXTH21, which is independent of the CBF pathway.

References

Apr 4, 2003·Genes & Development·Viswanathan ChinnusamyJian-Kang Zhu
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Michael F. Thomashow
Sep 24, 2004·Proceedings of the National Academy of Sciences of the United States of America·Daniel CookMichael F Thomashow
May 17, 2006·Proceedings of the National Academy of Sciences of the United States of America·Chun-Hai DongJian-Kang Zhu
Dec 2, 2009·Biochimica Et Biophysica Acta·Donatella CanellaMichael F Thomashow
Aug 11, 2011·Plant & Cell Physiology·Feng QinKazuko Yamaguchi-Shinozaki
Jan 1, 2013·The Plant Cell·Katia PetroniRoberto Mantovani

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Citations

Nov 14, 2020·International Journal of Molecular Sciences·Mohammad AslamAbidur Rahman

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