Abstract
The effects of light, moderate and heavy branch pruning or lopping treatments (resulting in removal of 28-31, 56-60 and 80-82% of the foliage, respectively, unlopped control = 0%) were studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants. Within 24 h of lopping, transpiration rates decreased and water potentials increased. The effects of lopping continued for 48 days. The improved water status of the lopped plants enhanced water-use efficiency during the first 30 days. Regrowth was related to a combination of enhanced net assimilation rates during the first 30 days after lopping, use of current photoassimilates and stored carbohydrates in the roots (particularly in medium and heavily lopped plants) for the production of new leaf area, and delayed leaf senescence. The lightly and moderately lopped plants developed 62 and 57% more leaf area, respectively, than the unlopped plants, but total leaf area development was slower in the heavily lopped plants. Lightly lopped plants produced total biomass equivalent to that of unlopped plants, but the moderately and heavily lopped plants produced less biomass than the unlopped plants. During the first 30 days after lopping, there was a net loss of nodule dry matter and recovery to control values did not occur during the period of study. Immediately (24 h) after lopping, more (14)C-photosynthate was translocated to the roots of lopped plants than to the roots of unlopped plants. When a branch near the base of the main stem was fed (14)CO(2), (14)C-photosynthate translocation to the shoot increased with increasing intensity of lopping, at 50 days after lopping.
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Claims 13
Claim · model-written summary
Transpiration rates decreased within 24 h of lopping.
- Taxon
- Alnus glutinosa
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Alnus glutinosae0 - Treatment
- loppinge1
- Outcome
- transpiration ratese1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e1“Within 24 h of lopping, transpiration rates decreased and water potentials increased”
Claim · model-written summary
Water potentials increased within 24 h of lopping.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- loppinge1
- Outcome
- water potentialse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e1“Within 24 h of lopping, transpiration rates decreased and water potentials increased”
Claim · model-written summary
Lopping enhanced water-use efficiency during the first 30 days.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- lopped plantse6
- Outcome
- water-use efficiencye6
- Direction
- enhancede6
- Qualifier
- during the first 30 dayse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e6“The improved water status of the lopped plants enhanced water-use efficiency during the first 30 days”
Claim · model-written summary
Lightly lopped plants developed 62 percent more leaf area than unlopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- lightlye2
- Outcome
- leaf areae2
- Direction
- moree2
- Value
- 62e2
- Comparator
- unlopped plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e2“The lightly and moderately lopped plants developed 62 and 57% more leaf area, respectively, than the unlopped plants, but total leaf area development was slower in the heavily lopped plants”
Claim · model-written summary
Moderately lopped plants developed 57% more leaf area than unlopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- moderatelye2
- Outcome
- leaf areae2
- Direction
- moree2
- Value
- 57%e2
- Comparator
- unlopped plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e2“The lightly and moderately lopped plants developed 62 and 57% more leaf area, respectively, than the unlopped plants, but total leaf area development was slower in the heavily lopped plants”
Claim · model-written summary
Total leaf area development was slower in heavily lopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- heavily lopped plantse2
- Outcome
- total leaf area developmente2
- Direction
- slowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e2“The lightly and moderately lopped plants developed 62 and 57% more leaf area, respectively, than the unlopped plants, but total leaf area development was slower in the heavily lopped plants”
Claim · model-written summary
Total biomass of lightly lopped plants was equivalent to that of unlopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- Lightly lopped plantse3
- Outcome
- total biomasse3
- Direction
- equivalente3
- Comparator
- unlopped plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e3“Lightly lopped plants produced total biomass equivalent to that of unlopped plants, but the moderately and heavily lopped plants produced less biomass than the unlopped plants”
Claim · model-written summary
Moderately and heavily lopped plants produced less biomass than unlopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- moderately and heavily lopped plantse3
- Outcome
- biomasse3
- Direction
- lesse3
- Comparator
- unlopped plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e3“Lightly lopped plants produced total biomass equivalent to that of unlopped plants, but the moderately and heavily lopped plants produced less biomass than the unlopped plants”
Claim · model-written summary
Nodule dry matter showed a net loss during the first 30 days after lopping.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Organ / stage
- nodulee4
- Treatment
- after loppinge4
- Outcome
- net loss of nodule dry mattere4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e4“During the first 30 days after lopping, there was a net loss of nodule dry matter and recovery to control values did not occur during the period of study”
Claim · model-written summary
Nodule dry matter did not recover to control values during the study period.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Organ / stage
- nodulee4
- Treatment
- after loppinge4
- Outcome
- recovery to control values did not occure4
- Comparator
- control valuese4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e4“During the first 30 days after lopping, there was a net loss of nodule dry matter and recovery to control values did not occur during the period of study”
Claim · model-written summary
Immediately after lopping, more 14C-photosynthate was translocated to the roots of lopped plants than of unlopped plants.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Organ / stage
- rootse5
- Treatment
- after loppinge5
- Outcome
- (14)C-photosynthatee5
- Direction
- moree5
- Comparator
- unlopped plantse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e5“Immediately (24 h) after lopping, more (14)C-photosynthate was translocated to the roots of lopped plants than to the roots of unlopped plants”
Claim · model-written summary
Translocation of 14C-photosynthate to the shoot increased with increasing lopping intensity at 50 days after lopping.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Treatment
- increasing intensity of loppinge7
- Outcome
- (14)C-photosynthate translocation to the shoote7
- Direction
- increasede7
- Qualifier
- at 50 days after loppinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e7“When a branch near the base of the main stem was fed (14)CO(2), (14)C-photosynthate translocation to the shoot increased with increasing intensity of lopping, at 50 days after lopping”
Claim · model-written summary
Regrowth after lopping was probably related to enhanced net assimilation rates, use of current photoassimilates and stored root carbohydrates.
- Taxon
- Alnus glutinosaAlnus glutinosae0
- Outcome
- Regrowthe7
- Qualifier
- enhanced net assimilation ratese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in 3-year-old black alder (Alnus glutinosa L. Gaertn.) plants”
e7“Regrowth was related to a combination of enhanced net assimilation rates during the first 30 days after lopping, use of current photoassimilates and stored carbohydrates in the roots”
The same questions in other papers
light · growth · Alnus glutinosaPositive and negative results
1 in the opposite direction
- 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.