Plant Diversity ›› 2010, Vol. 32 ›› Issue (4): 355-360.DOI: 10.3724/SP.J.1143.2010.09250

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Mutation of APETALA1 Affects the Basal Expression of WRKY Genes

 ZHANG  Li-Ping-1,2,  , YU  Di-Qiu-1   

  1. 1 Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2009-12-22 Online:2010-08-25 Published:2010-02-04


The floral homeotic gene APETALA1 (AP1) specifies floral meristem identity and sepal and petal identity in Arabidopsis. GUS staining showed that the expression of AP1 mainly focus on shoot apex, sepal and petal, floral meristem, junction of siliques and pedicels. Sequence analysis showed that numerous ciselements were found in the AP1 promoter, including the Wbox, which indicated the regulated expression of AP1 by certain transcriptional factors. 21 independent wrky single mutants did not affect the expression of AP1 in inflorescence, however, mutation of AP1 enhanced the basal expression of seven WRKY genes among the 10 genes checked. This result implied that AP1 may participate in the basal resistance of flower through controlling the development of both sepals and petals.

Key words: AP1, Wbox, WRKY, Basal expression, Basal resistance

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