Abstract
Plant propagators must take two technological critical decisions: the plug-cell size and the growing medium, both of which have been mentioned as abiotic stress sources for bedding pot plants. However, only a few recent reports on bedding pot plants have simultaneously included limiting and non-limiting plug cell volumes and growing medium during nursery. The aim of this work was to assess the nursery performance of Impatiens walleriana seedlings grown in four plug cell volumes and four growing media with significant differences in both physical and chemical properties. Plants were sprayed or not with an early and single benzyl aminopurine (BAP) dose, aiming to understand how they interact on determining biomass accumulation at the pot transplant stage. The hypothesis tested was that, both plug cell volume and growing medium, must be seen as additive abiotic stress sources, which can be partially overridden by exogenous cytokinin supply. The main result was that, in I. walleriana seedlings, the abiotic stress imposed by the growing medium quality during nursery had a higher effect on biomass accumulation (on both fresh and dry base), leaf area expansion and photo assimilates partitioning than plug cell volume and constitute an interactive process associated with cytokinin synthesis. From a grower´s point of view, one expensive option to avoid root restriction is to use high quality growing media and increase the plug cell volume. In contrast, a single 100 mg L-1 BAP spray can partially override the root restriction symptoms related to abiotic stresses. The novelty of this work is related to the fact that growing media quality would be a more limited factor than plug cell volume for I. walleriana seedlings during nursery.
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Claims 4
Claim · model-written summary
In Impatiens walleriana seedlings, growing medium quality had a higher effect than plug cell volume on biomass accumulation, leaf area expansion and photoassimilate partitioning.
- Taxon
- I. walleriana
Impatiens wallerianae0 - Treatment
- growing medium qualitye0
- Outcome
- biomass accumulation (on both fresh and dry base), leaf area expansion and photo assimilates partitioninge0
- Direction
- higher effecte0
- Comparator
- plug cell volumee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in I. walleriana seedlings, the abiotic stress imposed by the growing medium quality during nursery had a higher effect on biomass accumulation (on both fresh and dry base), leaf area expansion and photo assimilates partitioning than plug cell volume”
Claim · model-written summary
The effects of growing medium and plug cell volume constitute an interactive process associated with cytokinin synthesis.
- Taxon
- Impatiens wallerianaImpatiens wallerianat0
- Compound
- cytokinine0
- Outcome
- interactive processe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitute an interactive process associated with cytokinin synthesis”
t0“Impatiens walleriana”
Claim · model-written summary
To avoid root restriction in nursery, one (expensive) option is to use high quality growing media and increase the plug cell volume.
- Taxon
- Impatiens wallerianaImpatiens wallerianat0
- Outcome
- use high quality growing media and increase the plug cell volumee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one expensive option to avoid root restriction is to use high quality growing media and increase the plug cell volume”
t0“Impatiens walleriana”
Claim · model-written summary
A single 100 mg L-1 BAP spray can partially override root restriction symptoms related to abiotic stresses.
- Taxon
- Impatiens wallerianaImpatiens wallerianat0
- Treatment
- single 100 mg L-1 BAP spraye0
- Outcome
- root restriction symptomse0
- Direction
- partially overridee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a single 100 mg L-1 BAP spray can partially override the root restriction symptoms related to abiotic stresses”
t0“Impatiens walleriana”
The same questions in other papers
application · disease · Impatiens wallerianaPositive and negative results
1 in the opposite direction
- negative
in vitro · growth · Impatiens wallerianaResults agree
1 paper in the same direction as this paper
- 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.