Retraction notice to“Improvement in winter wheat productivity through regulating PSⅡ photochemistry,photosynthesis and chlorophyll fluorescence under deficit irrigation conditions”

This article has been retracted:please see Elsevier Policy on Article Withdrawal(http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Editor and Authors.The article was submitted by the first author Shahzad ALI without permission from corresponding author,Dr.JIA Zhi-kuan.The editor and corresponding author requested to retract the article.Apologies are offered to the readers of the journal.