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ACTA HORTICULTURAE SINICA ›› 2016, Vol. 43 ›› Issue (2): 239-248.doi: 10.16420/j.issn.0513-353x.2015-0602

• Fruit Trees • Previous Articles     Next Articles

Expression of Two Citrus AP2/ERF Genes Under Different Hormone and#br# Stress Treatments

DONG Cui-cui,MA Yan-yan,XIE Rang-jin,DENG Lie,YI Shi-lai,LÜ Qiang,ZHENG Yong-qiang,#br# and HE Shao-lan*   

  1. Citrus Research Institute,Southwest University–Chinese Academy of Agricultural Scieneces,Chongqing 400712,China
  • Online:2016-02-25 Published:2016-02-25

Abstract:

Two AP2/ERF genes,CitERF9 and CitAP2-7 were analyzed in Citrus junos‘Ziyang’. The
data showed that CitERF9 genomic sequence contained a single exon of 735 bp long,which could encode
a protein of 244 amino acid residues. In contrast,CitAP2-7 genomic sequence possessed 5 introns and its 6
exons could encode a protein of 360 amino acid residues. Sequence alignment showed that CitERF9 and
CitAP2-7 shared 81%–84% amino acid identities with corresponding AP2/ERF members from soybean,
castor,peach and alfalfa. Real time quantitative analysis revealed that the expression of CitAP2-7 and
CitERF9 in different tissues exhibited different patterns. In roots,CitERF9 was induced by all hormone
and stress treatments,whereas CitAP2-7 was mainly modulated by NaCl,ABA and dehydration. In leaves,
CitERF9 was up-regulated by all treatments,similar to that in roots. But CitAP2-7 was suppressed by
ABA,ACC,MeJA,SA and NaCl treatments. The results suggested the involvement of both CitERF9 andCitAP2-7 in the responses of citrus to stresses and relevant hormones.

Key words: citrus, CitERF9, CitAP2-7, gene expression, hormone, stress

CLC Number: