Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (11): 2340-2347.DOI: 10.3969/j.issn.1004-1524.2022.11.03

• Crop Science • Previous Articles     Next Articles

Identification of the interaction between ZmNLP5 and promoters of ZmSTP1, ZmAAP2 gene in maize

YUAN Chongyuan(), ZHU Yuanfei, CHEN Xia, ZHU Chan, WANG Yi, TAO Haiyan, YU Jiaojiao()   

  1. School of Chemical Biology and Environment, Yuxi Normal Universtiy, Yuxi 653100, Yunnan,China
  • Received:2022-05-06 Online:2022-11-25 Published:2022-11-29
  • Contact: YU Jiaojiao

Abstract:

Nitrogen (N) is the major limitation factor for its grain production, and both genes contain a NRE cis element in the promoter region.N use efficiency of maize may be improved by increasing the availability of carbon (C). Transporters of ZmSTP1 and ZmAPP2 play important roles in the transport and unloading of C-N assimilates in maize. In addition, both ZmSTP1 and ZmAAP2 contain NRE cis elements in promoter regions. NIN-like protein (NLP) is a conserved plant-specific transcription factor family and has been shown in several plant species to be a key player in regulating nitrogen response. ZmNLP5 is a central hub in a molecular network for mediating N signalling and metabolism. To understand whether ZmNLP5 is involved in regulating of ZmSTP1 and ZmAAP2, we used maize B73 as experimental material to explore the interaction between ZmNLP5, ZmSTP1 and ZmAAP2 by yeast one-hybrid system. The results showed that the pGADT7-ZmNLP5-1/2 were transformed into the Y1H(pAbAi-ZmSTP1) and Y1H(pAbAi-ZmAAP2) strains, respectively, they all grew normally on control medium (SD/-Leu). On selection medium (SD/-Leu/+200 ng·mL-1AbA), the growth of Y1H(pAbAi-ZmAAP2/pGADT7-ZmNLP5-1) strain had been in normal. This result suggested that ZmNLP5 can interact with ZmAAP2 gene, ZmNLP5 is a transcription factor that can bind to the NRE element of ZmAAP2. The results of this study not only contribute to the further understanding of the regulatory mechanism of nitrate signal transduction in maize, but also provide a theoretical basis for the future study of nitrate signal transduction in other plants.

Key words: maize, yeast one-hybrid, transport protein

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