Interaction between mild NaCl salinity and sublethal SO2 pollution on wheat Triticum aestivum cultivar ‘Wilgoyne’ (Ciano/Gallo). I. Responses of stomatal conductance, photosynthesis, growth and assimilate partitioning
- Huang, L.
- Murray, F.
- Yang, X.
DOIAbstract
Wheat (Triticum aestivum cultivar 'Wilgoyne' (Ciano/Gallo)) plants were exposed to a factorial combination of two levels of salinity (control and 50 mM NaCl), and three levels of SO2 (<10 (ambient), 231, and 441 nl 1-1) in fumigation chambers with rain-exclusioon tops for 4 h per dayfor up to 51 days. The objective was to investigate whether mild salinity stress could decrease the sensitivity of plant growth to sublethal SO2 stress. Exposure to 441 nl 1-1 SO2 significantly decreased CO2 stomatal conductance, net photosynthesis rate, and at the end of experiment, chlorophyll concentrations in the youngest fully expanded (YFE) leaves. Inhibition of hotosynthesis by 441 nl 1-1 SO2 fumigation resulted in a change in assimilate allocation in fav...
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