Abstract
One-year rooted shoots of M.VII apple rootstock were grown for a single season by spraying their roots continuously with nutrient solutions containing either < 3 ppmMg(Mg(0)) or 45 ppm(Mg(0)) to give, respectively, potentially very deficient or healthy plants. The new shoots of half the plants in each of these treatments were dipped periodically in a 2 per cent solution of MgSO4. 7H2O plus ‘wetter’. Mg(0) undipped plants developed severe symptoms of Mg deficiency, growth was poor, and the shoot/root dry-weight increment ratio was high; none of these characteristics was found in Mg(0) dipped plants, whose growth was not appreciably less than that of Mg(2) undipped controls. There was little translocation of Mg from leaves to roots: the concentration of Mg in roots of Mg(0) dipped plants was as low as that of the undipped. The large accumulation of Mn and, to a less extent, of Fe in Mg(0) dipped roots was not apparently detrimental to growth. Growth of Mg(2) dipped plants was similar to that of the undipped. Dipping had little effect on the chemical composition of leaves, except to raise the concentration of Mg.
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Claims 9
Claim · model-written summary
M.VII apple rootstock plants grown with very low Mg and left undipped developed severe Mg deficiency symptoms.
Verbatim
t0“Apple Rootstocks”
e0“Mg(0) undipped plants developed severe symptoms of Mg deficiency”
Claim · model-written summary
Mg(0) plants whose shoots were dipped in MgSO4 had growth not appreciably less than healthy Mg(2) undipped controls.
Verbatim
t0“Apple Rootstocks”
e0“none of these characteristics was found in Mg(0) dipped plants, whose growth was not appreciably less than that of Mg(2) undipped controls”
Claim · model-written summary
Dipping shoots of Mg-deficient plants removed the high shoot/root dry-weight increment ratio seen in undipped Mg(0) plants.
Verbatim
t0“Apple Rootstocks”
e0“growth was poor, and the shoot/root dry-weight increment ratio was high; none of these characteristics was found in Mg(0) dipped plants”
e1“Mg(0) undipped plants developed”
Claim · model-written summary
Little Mg was translocated from leaves to roots.
Verbatim
t0“Apple Rootstocks”
e0“There was little translocation of Mg from leaves to roots”
Claim · model-written summary
Root Mg concentration of Mg(0) dipped plants was as low as that of undipped plants.
Verbatim
t0“Apple Rootstocks”
e0“the concentration of Mg in roots of Mg(0) dipped plants was as low as that of the undipped”
Claim · model-written summary
Mg(0) dipped roots accumulated large amounts of Mn and, less so, Fe, which was not apparently detrimental to growth.
Verbatim
t0“Apple Rootstocks”
e0“The large accumulation of Mn and, to a less extent, of Fe in Mg(0) dipped roots was not apparently detrimental to growth”
Claim · model-written summary
Growth of Mg(2) dipped plants was similar to that of undipped plants.
Verbatim
t0“Apple Rootstocks”
e0“Growth of Mg(2) dipped plants was similar to that of the undipped”
Claim · model-written summary
Dipping had little effect on the chemical composition of leaves.
- Taxon
- Apple Rootstockst0
- Treatment
- Dippinge0
- Outcome
- chemical composition of leavese0
- Direction
- little effecte0
Not reportedComparator
Verbatim
t0“Apple Rootstocks”
e0“Dipping had little effect on the chemical composition of leaves”
Claim · model-written summary
Dipping raised the concentration of Mg in leaves.
Not reportedComparator
Verbatim
t0“Apple Rootstocks”
e0“Dipping had little effect on the chemical composition of leaves, except to raise the concentration of Mg”