Abstract
When seedlings of a single seed source of Scots pine (Pinussylvestris L.) were raised for 26 weeks in a naturally lit, heated greenhouse, two types of shoot morphology were observed. Type 1 was that normally found in 1-year-old seedlings. Type 2 had a shoot morphology similar to that of seedlings raised outdoors for two growing seasons. When compared with type 1 plants, type 2 plants had an earlier start to shoot elongation, set their buds earlier, and stopped shoot elongation sooner. After one growing season, type 2 plants were shorter, had fewer stem units for shoot elongation in the second season, but carried a greater foliage biomass than 1-year-old type plants. After two seasons they remained shorter. Thus, plant rearing practices which result in the production of seedlings with this type of shoot morphology arc undesirable.The relationship between early "budsct," shoot morphology, and plant height suggests that the proportion of seedlings with a 2-year-old shoot morphology after one growing season in a heated greenhouse may be used as an early test for height growth potential in seed origins and possibly in progenies of north temperate pine species.
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Claims 8
Claim · model-written summary
Two types of shoot morphology were observed in Scots pine seedlings of a single seed source raised for 26 weeks in a heated greenhouse.
- Taxon
- Scots pine
Pinus sylvestrise0 - Outcome
- two types of shoot morphologye0
- Setting
- naturally lit, heated greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When seedlings of a single seed source of Scots pine (Pinussylvestris L.) were raised for 26 weeks in a naturally lit, heated greenhouse, two types of shoot morphology were observed”
Claim · model-written summary
Compared with type 1 plants, type 2 plants had an earlier start to shoot elongation, set buds earlier and stopped shoot elongation sooner.
- Taxon
- Scots pinePinus sylvestrist0
- Material
- type 2 plantse0
- Outcome
- start to shoot elongation, set their buds earlier, and stopped shoot elongatione0
- Direction
- earliere0
- Comparator
- type 1 plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared with type 1 plants, type 2 plants had an earlier start to shoot elongation, set their buds earlier, and stopped shoot elongation sooner”
t0“Scots pine”
Claim · model-written summary
After one growing season, type 2 plants were shorter than type 1 plants.
- Taxon
- Scots pinePinus sylvestrist0
- Material
- type 2 plantse0
- Outcome
- shortere0
- Direction
- shortere0
- Comparator
- 1-year-old type plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After one growing season, type 2 plants were shorter, had fewer stem units for shoot elongation in the second season, but carried a greater foliage biomass than 1-year-old type plants”
t0“Scots pine”
Claim · model-written summary
After one growing season, type 2 plants had fewer stem units for shoot elongation in the second season than type 1 plants.
- Taxon
- Scots pinePinus sylvestrist0
- Material
- type 2 plantse0
- Outcome
- stem units for shoot elongation in the second seasone0
- Direction
- fewere0
- Comparator
- 1-year-old type plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After one growing season, type 2 plants were shorter, had fewer stem units for shoot elongation in the second season, but carried a greater foliage biomass than 1-year-old type plants”
t0“Scots pine”
Claim · model-written summary
After one growing season, type 2 plants carried a greater foliage biomass than type 1 plants.
- Taxon
- Scots pinePinus sylvestrist0
- Material
- type 2 plantse0
- Outcome
- foliage biomasse0
- Direction
- greatere0
- Comparator
- 1-year-old type plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After one growing season, type 2 plants were shorter, had fewer stem units for shoot elongation in the second season, but carried a greater foliage biomass than 1-year-old type plants”
t0“Scots pine”
Claim · model-written summary
After two seasons type 2 plants remained shorter.
- Taxon
- Scots pinePinus sylvestrist0
- Outcome
- remained shortere0
- Direction
- shortere0
Not reportedMaterialComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After two seasons they remained shorter”
t0“Scots pine”
Claim · model-written summary
The authors conclude that rearing practices producing seedlings with this type 2 shoot morphology are undesirable.
- Taxon
- Scots pinePinus sylvestrist0
- Outcome
- undesirablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant rearing practices which result in the production of seedlings with this type of shoot morphology arc undesirable”
t0“Scots pine”
Claim · model-written summary
The authors suggest the proportion of seedlings with a 2-year-old shoot morphology after one growing season in a heated greenhouse may serve as an early test for height growth potential in seed origins and possibly progenies.
- Taxon
- Scots pinePinus sylvestrist0
- Outcome
- early test for height growth potentiale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of seedlings with a 2-year-old shoot morphology after one growing season in a heated greenhouse may be used as an early test for height growth potential in seed origins”
t0“Scots pine”