Plant Mol Biol (2017) 94:109–124 DOI 10.1007/s11103-017-0596-6 Cassava C-repeat binding factor 1 gene responds to low temperature and enhances cold tolerance when overexpressed in Arabidopsis and cassava 1 1 1 2 1 Dong An · Qiuxiang Ma · Hongxia Wang · Jun Yang · Wenzhi Zhou · Peng Zhang Received: 29 May 2016 / Accepted: 16 February 2017 / Published online: 4 March 2017 © Springer Science+Business Media Dordrecht 2017 Abstract the nucleus and is mainly expressed in stem and mature Key message Cassava MeCBF1 is a typical CBF leaves, but not in apical buds or stem cambium. MeCBF1 transcription factor mediating cold responses but its expression was not only highly responsive to cold, but low expression in apical buds along with a retarded also significantly induced by salt, PEG and ABA treat- response cause inefficient upregulation of downstream ment. Several stress-associated cis-elements were found cold-related genes, rendering cassava chilling-sensitive. in its promoter region, e.g., ABRE-related, MYC recogni- Abstract Low temperature is a major abiotic stress factor tion sites, and MYB responsive element. Compared with affecting survival, productivity and geographic distribution AtCBF1, the MeCBF1 expression induced by cold in cas- of important crops worldwide. The C-repeat/dehydration- sava was retarded and upregulated only after 4 h, which responsive element binding
Plant Molecular Biology – Springer Journals
Published: Mar 4, 2017
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