Abstract
Transplanted oilseed rape (Brassica napus L.) plants were reported to be sensitive to zinc (Zn) deficiency and had a higher external Zn requirement. However, it was not clear whether the increased external Zn requirement was due to transplanting. The aims of this study were to clarify the dynamics of root and shoot recovery growth after transplanting and to assess the effect of Zn supply and root pruning on growth and Zn absorption by transplanted oilseed rape. Transplanted oilseed rape was grown in chelate-buffered nutrient solution and harvested successively at 5-day intervals from 0 to 25 days after transplanting. Treatments consisted of two levels of Zn-HEDTA (0.02 and 5.0 µM) and two root treatments (unpruned and 50% root pruning). The experiment was arranged in a Randomized Complete Block Design (RCBD). Plants were harvested at 5, 10, 15, 20 and 25 days after transplanting. Significant treatment effects were separated with LSD at P £ 0.05. Results showed that low Zn solution and 50% root pruning depressed the growth rates including shoot and root dry weights. The root dry weight of plants with pruned roots recovered only 70% of that with unpruned roots. In addition, plants with unpruned roots had higher Zn absorption rate in their shoot and root dry weights. High solution Zn alleviated but did not fully overcome the effects of pruning on growth of transplanted oilseed rape. Hence, it would be worthwhile to examine the rhizosphere modification including organic acids released by growing roots after transplanting and their response to Zn supply and root pruning.
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Claims 5
Claim · model-written summary
Low zinc solution depressed oilseed rape shoot and root dry weight growth rates.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- low Zn solutione0
- Outcome
- growth rates including shoot and root dry weightse0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“low Zn solution and 50% root pruning depressed the growth rates including shoot and root dry weights”
e1“Transplanted oilseed rape (Brassica napus L.)”
Claim · model-written summary
Pruning 50% of roots depressed oilseed rape shoot and root dry weight growth rates.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- 50% root pruninge0
- Outcome
- growth rates including shoot and root dry weightse0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low Zn solution and 50% root pruning depressed the growth rates including shoot and root dry weights”
e1“Transplanted oilseed rape (Brassica napus L.)”
Claim · model-written summary
Pruned oilseed rape roots recovered only 70% of the dry weight of unpruned roots.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- pruned rootse0
- Outcome
- root dry weighte0
- Direction
- onlye0
- Value
- 70%e0
- Comparator
- unpruned rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root dry weight of plants with pruned roots recovered only 70% of that with unpruned roots”
e1“Transplanted oilseed rape (Brassica napus L.)”
Claim · model-written summary
Unpruned oilseed rape had a higher zinc absorption rate.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- unpruned rootse0
- Outcome
- Zn absorption ratee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants with unpruned roots had higher Zn absorption rate in their shoot and root dry weights”
e1“Transplanted oilseed rape (Brassica napus L.)”
Claim · model-written summary
High solution zinc alleviated the pruning effect on oilseed rape growth without fully overcoming it.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- High solution Zne0
- Outcome
- effects of pruning on growthe0
- Direction
- alleviatede0
- Qualifier
- did not fully overcomee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High solution Zn alleviated but did not fully overcome the effects of pruning on growth of transplanted oilseed rape”
The same questions in other papers
zinc atom · growth · Brassica napus (oilseed rape)Results differ
14 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
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See all 20 papers →pruning · growth · Brassica napus (oilseed rape)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.