Abstract
Most Jerusalem artichoke (JA, Helianthus tuberosus L.) grown as edible functional food plant, produce more tubers with high stems (1.5-2.0 m). To develop them as potted plant it is necessary to control their height and to increase branches in order to create a more compact canopy. Two experiments were conducted under greenhouse conditions. Experiment 1 demonstrated that pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP) increased canopy width, total leaf area, compactness index, number of branching and leaf and stem dry weight, but reduced plant height more than 40% when compared with non-pinching treatment. Leaving 2 or 3 LFP instead of 4 LFP after pinching only increased compactness index with marketable characters. None of the pinching times (10, 20 and 30 days after tuber planting: DAP) affected total leaf area, compactness index, number of branching and total leaf area. Pinching at 30 DAP gave the lowest leaf and root dry weight (DW). No interaction between pinching position and time in all growth parameters was seen, except in plant stem DW by leaving 2 or 3 LFP at 20 DAP after pinching. Experiment 2 showed that pinching seedlings with 2 LFP had low new tuber DW through all growth stages, however the underground part produced higher DW when reaching the harvesting stage. Higher reducing sugar accumulation in new tubers was found in normal plants (non-pinched) from flowering stage to senescence stage, thereafter its content declined compared to pinching plant at harvesting time. This result suggests that pinching technique might be partially a good horticultural practice to control JA height and canopy for the use as an ideal ornamental containerized plant.
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Claims 13
Claim · model-written summary
Pinching seedlings at 2, 3 or 4 leaf pairs increased canopy width, total leaf area and compactness index compared with non-pinching.
- Taxon
- Helianthus tuberosus
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Helianthus tuberosust0 - Treatment
- pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP)e1
- Outcome
- canopy width, total leaf area, compactness indexe1
- Direction
- increasede1
- Comparator
- non-pinching treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP) increased canopy width, total leaf area, compactness index, number of branching and leaf and stem dry weight, but reduced plant height more than 40% when compared with non-pinching treatment”
t0“Helianthus tuberosus”
Claim · model-written summary
Pinching seedlings at 2, 3 or 4 leaf pairs increased the number of branches and leaf and stem dry weight compared with non-pinching.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP)e1
- Outcome
- number of branching and leaf and stem dry weighte1
- Direction
- increasede1
- Comparator
- non-pinching treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP) increased canopy width, total leaf area, compactness index, number of branching and leaf and stem dry weight, but reduced plant height more than 40% when compared with non-pinching treatment”
t0“Helianthus tuberosus”
Claim · model-written summary
Pinching seedlings at 2, 3 or 4 leaf pairs reduced plant height by more than 40% compared with non-pinching.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP)e1
- Outcome
- plant heighte1
- Direction
- reducede1
- Value
- more than 40%e1
- Comparator
- non-pinching treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pinching seedlings at all position (2, 3, and 4 leaf pairs: LFP) increased canopy width, total leaf area, compactness index, number of branching and leaf and stem dry weight, but reduced plant height more than 40% when compared with non-pinching treatment”
t0“Helianthus tuberosus”
Claim · model-written summary
Leaving 2 or 3 leaf pairs instead of 4 after pinching increased only the compactness index.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- Leaving 2 or 3 LFPe1
- Outcome
- compactness indexe1
- Direction
- increasede1
- Comparator
- 4 LFPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Leaving 2 or 3 LFP instead of 4 LFP after pinching only increased compactness index with marketable characters”
t0“Helianthus tuberosus”
Claim · model-written summary
None of the pinching times (10, 20 and 30 days after tuber planting) affected total leaf area, compactness index or number of branches.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- pinching times (10, 20 and 30 days after tuber planting: DAP)e1
- Outcome
- total leaf area, compactness index, number of branchinge1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“None of the pinching times (10, 20 and 30 days after tuber planting: DAP) affected total leaf area, compactness index, number of branching and total leaf area”
t0“Helianthus tuberosus”
Claim · model-written summary
Pinching at 30 days after tuber planting gave the lowest leaf and root dry weight.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- Pinching at 30 DAPe1
- Outcome
- leaf and root dry weighte1
- Direction
- loweste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Pinching at 30 DAP gave the lowest leaf and root dry weight (DW)”
t0“Helianthus tuberosus”
Claim · model-written summary
No interaction between pinching position and time was seen in any growth parameter.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- pinching position and timee1
- Outcome
- all growth parameterse1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“No interaction between pinching position and time in all growth parameters was seen”
t0“Helianthus tuberosus”
Claim · model-written summary
An interaction was seen in plant stem dry weight for leaving 2 or 3 leaf pairs at 20 days after planting.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- leaving 2 or 3 LFP at 20 DAP after pinchinge1
- Outcome
- plant stem DWe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“except in plant stem DW by leaving 2 or 3 LFP at 20 DAP after pinching”
t0“Helianthus tuberosus”
Claim · model-written summary
In experiment 2, seedlings pinched with 2 leaf pairs had low new tuber dry weight through all growth stages.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Organ / stage
- all growth stagese1
- Treatment
- pinching seedlings with 2 LFPe1
- Outcome
- new tuber DWe1
- Direction
- lowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pinching seedlings with 2 LFP had low new tuber DW through all growth stages”
t0“Helianthus tuberosus”
Claim · model-written summary
With 2-leaf-pair pinching the underground part produced higher dry weight at the harvesting stage.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Organ / stage
- harvesting stagee1
- Treatment
- pinching seedlings with 2 LFPe1
- Outcome
- underground part produced higher DWe1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pinching seedlings with 2 LFP had low new tuber DW through all growth stages, however the underground part produced higher DW when reaching the harvesting stage”
t0“Helianthus tuberosus”
Claim · model-written summary
New tubers of normal non-pinched plants accumulated higher reducing sugar than pinched plants from the flowering to the senescence stage.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Organ / stage
- flowering stage to senescence stagee1
- Treatment
- pinching plante1
- Outcome
- reducing sugar accumulation in new tuberse1
- Direction
- Highere1
- Comparator
- normal plants (non-pinched)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Higher reducing sugar accumulation in new tubers was found in normal plants (non-pinched) from flowering stage to senescence stage, thereafter its content declined compared to pinching plant at harvesting time”
t0“Helianthus tuberosus”
Claim · model-written summary
At harvesting time the reducing sugar content of new tubers in non-pinched plants declined relative to pinched plants.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Organ / stage
- harvesting timee1
- Treatment
- pinching plante1
- Outcome
- reducing sugar accumulation in new tuberse1
- Direction
- declinede1
- Comparator
- normal plants (non-pinched)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Higher reducing sugar accumulation in new tubers was found in normal plants (non-pinched) from flowering stage to senescence stage, thereafter its content declined compared to pinching plant at harvesting time”
t0“Helianthus tuberosus”
Claim · model-written summary
The authors suggest that pinching might be partially a good horticultural practice to control height and canopy of Jerusalem artichoke as an ornamental containerized plant.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Outcome
- control JA height and canopy for the use as an ideal ornamental containerized plante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“pinching technique might be partially a good horticultural practice to control JA height and canopy for the use as an ideal ornamental containerized plant”
t0“Helianthus tuberosus”
The same questions in other papers
pruning · growth · Helianthus tuberosus (Jerusalem artichoke)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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.