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KMID : 0578320100300030271
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Molecules and Cells
2010 Volume.30 No. 3 p.271 ~ p.277
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Overexpression of the Ethylene-Responsive Factor Gene BrERF4 from Brassica rapa Increases Tolerance to Salt and Drought in Arabidopsis Plants
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Seo Yean-Joo
Park Jong-Beum
Cho Yeon-Jeong
Jung Choon-Kyun
Seo Hak-Soo
Park Soon-Ki
Nahm Baek-Hie
Song Jong-Tae
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Abstract
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Ethylene-responsive factors (ERFs), within a subgroup of the AP2/ERF transcription factor family, are involved in diverse plant reactions to biotic or abiotic stresses. Here, we report that overexpression of an ERF gene from Bras-sica rapa ssp. pekinensis (BrERF4) led to improved toler-ance to salt and drought stresses in Arabidopsis. It also significantly affected the growth and development of transgenic plants. We detected that salt-induced expres-sions of a transcriptional repressor gene, AtERF4, and some Ser/Thr protein phosphatase2C genes, ABI1, ABI2 and AtPP2CA, were suppressed in BrERF4-overexpres-sing Arabidopsis plants. Furthermore, BrERF4 was in-duced by treatment with ethylene or methyljasmonate, but not by abscisic acid or NaCl in B. rapa. These results suggest that BrERF4 is activated through a network of different signaling pathways in response to salinity and drought.
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KEYWORD
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Brassica rapa (B. rapa), drought stress, ethylene-responsive factor (ERF), salt stress, transcriptional regulator
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