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Bulletin of Botanical Research ›› 2002, Vol. 22 ›› Issue (1): 46-50.

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PHOTOYNTHESIS AND RESPONSE TO WATER STRESS OF TOBACCO AT THE ROOT EXTENDING STAGE

SUN Guo-rong1, LIU Bo1, ZHAO Guang-wei2, LIU De-yu2, YAN Xiu-feng3   

  1. 1. Department of Biology, Harbin Normal University, Harbin 150080;
    2. Heilongjiang Institute of Tobacco Science, Mudanjiang 157011;
    3. Open Research Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin 150040
  • Received:2001-02-16 Online:2002-03-15 Published:2016-06-14

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Abstract: The flue-cured tobacco growth of NC89、LJ851、LJ911 focus mainly on subterranean part in the root extending stage. It is important element of production management to control soil water content reasonably and harmonize growth between root and stem at this stage. Photosynthesis rate reaches peak when relative soil water is at 75%~85%, yet water use efficiency peak value is at 65%~75% that is in favor of tobacco seedling strong growth.

Key words: flue-cured tobacco, water stress, photosynthesis rate, respiration rate, transpiration rate, water use efficiency