Evaluation of Golden Delicious/Chistock 1 on Resistance to Low Iron Stress
In order to evaluate the capacity of Chistock 1 on resistance to low iron stress,this experiment was conducted on the phenotypic,physiological and biochemical characteristics of 2-year-old Golden Delicious/Chistock 1 (GD/Cs) under different iron conditions of 0,4,10,20,30 or 40 μmol · L-1 Fe-EDTA.Compared to Golden Delicious/Malus baccata (GD/Mb),GD/Cs at 30 μmol · L-1 Fe showed no chlorosis in the whole growth period,and had no significant differences at Fe levels between the normal concentration (40 μmol · L-1) and low Fe stress (30 μmol · L-1) on shoot growth,leaf area,young leaf chlorophyll,photosynthetic rate,or active iron content.Furthermore,at 0 to 20 μmol · L-1 Fe,GD/Cs showed much slighter chlorosis than GD/Mb.However,GD/Mb showed severe chlorosis after 15 days at 30 μmol · L-1 Fe,and reduced leaf area with shoot tip dieback from 0 to 20 μmol · L-1 Fe in autumn growth stage.Thus,the experiment lead a preliminary conclusion that Golden Delicious can grow normally under long-term low iron stress on rootstock of Chistock 1.
applerootstocklow iron stressgrowth and development
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万方数据
维普
