Biotechnology Bulletin ›› 2019, Vol. 35 ›› Issue (3): 19-23.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0776

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Effect of Warming After Toping on the Growth and Development of the Upper Leaves of Flue-cured Tobacco

HE Wen-jun, YANG Tie-zhao, TIAN Pei, DUAN Du-wei, LI Xiao-hui, HE Jia, ZHOU Jian-fei   

  1. Henan Agricultural University,Zhengzhou 450002
  • Received:2018-09-06 Online:2019-03-26 Published:2019-04-03

Abstract: By studying the effects of warming after topping on the amino acid content and enzyme activity related to growth and development of the upper leaves of flue-cured tobacco,we aim to provide a reference for promoting the growth and development of upper leaves and increasing the yield of tobacco leaves. Having flue-cured tobacco variety Yunyan 116 as an experimental materials,two treatments was set:the normal temperature(T1)and warming treatment(T2). The hydroxyproline content and POD activity in cell wall as well as IAAO activity in the upper leaves of the two treatments were measured. The results showed that warming after toping effectively reduced the content of hydroxyproline,cell wall POD activity and IAAO activity in the upper leaves of tobacco leaves. The length,leaf width,leaf area,the yield and production value of the upper leaves for T2 treatment increased by 8.6%,3.9%,12.9%,7.0%,and 13.8%,compared with T1. In sum,the upper leaves development of flue-cured tobacco can be promoted significantly through warming properly after toping.

Key words: flue-cured tobacco, warming after toping, upper leaf, growth and development