Plant material
Bare-root plants (with root length of approximately 18 cm) of
strawberry (Fragaria ananassa Duch. cv. ‘Selva’) without leaves
were sterilised by immersion in a solution that contained 2.5 g of
fosetylealuminium for 2 h and thenwashed thoroughly in running
water. Twenty-four plants were transferred to two 20-L polyethylene
vessels filled with Hoagland’s nutrient solution, which
contained: 5 mM Ca(NO3)2, 5 mM KNO3, 1.0 mM KH2PO4, 2.0 mM
MgSO4, 46.0 mMH3BO3, 0.8 mMZnSO4, 0.4 mMCuSO4, 9.0 mMMnCl2,
and 0.02 mMMoO3. Half of the plants were grown in the presence of
10 mM Fe (as Fe(III)-EDDHA; Fe10) and half in the absence of Fe
(Fe0). The initial pH of the nutrient solution was 6.0 0.2 and the
electrical conductivity (EC) was 2.2 0.1 dS m1. The aerated
nutrient solution was replaced when the EC dropped to 1.7 dS m1.
The experiments were performed in a glasshouse under natural
photoperiod conditions and a temperature 25 C.
Plant materialBare-root plants (with root length of approximately 18 cm) ofstrawberry (Fragaria ananassa Duch. cv. ‘Selva’) without leaveswere sterilised by immersion in a solution that contained 2.5 g offosetylealuminium for 2 h and thenwashed thoroughly in runningwater. Twenty-four plants were transferred to two 20-L polyethylenevessels filled with Hoagland’s nutrient solution, whichcontained: 5 mM Ca(NO3)2, 5 mM KNO3, 1.0 mM KH2PO4, 2.0 mMMgSO4, 46.0 mMH3BO3, 0.8 mMZnSO4, 0.4 mMCuSO4, 9.0 mMMnCl2,and 0.02 mMMoO3. Half of the plants were grown in the presence of10 mM Fe (as Fe(III)-EDDHA; Fe10) and half in the absence of Fe(Fe0). The initial pH of the nutrient solution was 6.0 0.2 and theelectrical conductivity (EC) was 2.2 0.1 dS m1. The aeratednutrient solution was replaced when the EC dropped to 1.7 dS m1.The experiments were performed in a glasshouse under naturalphotoperiod conditions and a temperature 25 C.
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