A novel ethylene-responsive factor IbERF4 from sweetpotato negatively regulates abiotic stress

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Title
A novel ethylene-responsive factor IbERF4 from sweetpotato negatively regulates abiotic stress
Author(s)
Y Yu; Ho Soo Kim; P Ma; Z Jia; X Guo; Y Xie; Sang Soo Kwak; P Zhang; X Bian
Bibliographic Citation
Plant Biotechnology Reports, vol. 14, pp. 397-406
Publication Year
2020
Abstract
The ERF (ethylene-responsive element-binding factor) transcription factor family plays important roles in abiotic and biotic stress responses in plants. An EAR motif-containing ERF gene, IbERF4, was isolated from sweetpotato [Ipomoea batatas (L.) Lam]. IbERF4 was highly expressed in the early stage of storage roots and can be induced by various stresses. By overexpressing IbERF4 in Arabidopsis, the transgenic Arabidopsis showed greater sensitivity to drought and salt stress by down-regulating stress-related genes, such as rd22, rd29, AtCBF1 and AtCBF2. Overexpressing IbERF4 in sweetpotato made the transgenic sweetpotato more sensitive to salt stress and made propagating new seedlings more difficult. Consistently, the transcriptomic profiling results showed that genes involved in oxidative stress were significantly down-regulated in sweetpotato overexpression lines. These results indicated that IbERF4 plays as key regulators in sweetpotato abiotic stress.
Keyword
SweetpotatoEthyleneAbiotic stressTransgenicGene cloning
ISSN
1863-5466
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s11816-020-00612-x
Type
Article
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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