Abstract
Radial growth in five Terminalia ivorensis trees has been recorded from dendrometer reading for a period of 12 months. The duration of the growing season was 7–9 months. Variation in annual radial increment between individual trees was observed to be due both to differences in the length of the growing season and the rate of growth during that period. Seasonal changes in the diameter of sieve elements, and the extent of callose deposition on the sieve plates have also been investigated. Sieve element diameters were smallest in the dry season, possibly because of shrinkage. The width of phloem tissue showing definitive callose was fairly constant throughout the year, but the zone with open pores on the sieve plates changed, being widest in September, and narrowest in March when the trees were almost bare. There were two peaks of cambial activity, indicated by an increase in width of the ‘open pore zone’, one in April at the time of bud break, and a second in September. The sugar concentration of the phloem exudate obtained from small cuts into the bark of the trees varied throughout the year. Concentrations were highest in March, during the dry season, and lowest in May, when the young leaves were expanding.
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Claims 7
Claim · model-written summary
The growing season lasted 7–9 months.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- duration of the growing seasone0
- Value
- 7–9 monthse0
Verbatim
t0“Terminalia ivorensis”
e0“The duration of the growing season was 7–9 months”
Claim · model-written summary
Annual radial increment varied between trees with growing season length and growth rate.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Material
- individual treese0
- Outcome
- annual radial incremente0
- Qualifier
- differences in the length of the growing season and the rate of growth during that periode0
Not reportedDirection
Verbatim
t0“Terminalia ivorensis”
e0“Variation in annual radial increment between individual trees was observed to be due both to differences in the length of the growing season and the rate of growth during that period”
Claim · model-written summary
Sieve element diameters were smallest during the dry season.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- Sieve element diameterse0
- Direction
- smalleste0
- Setting
- dry seasone0
Verbatim
t0“Terminalia ivorensis”
e0“Sieve element diameters were smallest in the dry season, possibly because of shrinkage”
Claim · model-written summary
Width of phloem tissue showing definitive callose was fairly constant year round.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- width of phloem tissue showing definitive callosee0
- Direction
- fairly constante0
Verbatim
t0“Terminalia ivorensis”
e0“The width of phloem tissue showing definitive callose was fairly constant throughout the year”
Claim · model-written summary
The open-pore zone was widest in September and narrowest in March.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- zone with open pores on the sieve platese0
- Direction
- wideste0
- Qualifier
- narrowest in Marche0
Verbatim
t0“Terminalia ivorensis”
e0“the zone with open pores on the sieve plates changed, being widest in September, and narrowest in March”
Claim · model-written summary
Cambial activity peaked in April at bud break and again in September.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- cambial activitye0
- Value
- two peakse0
- Qualifier
- one in April at the time of bud break, and a second in Septembere0
Verbatim
t0“Terminalia ivorensis”
e0“There were two peaks of cambial activity, indicated by an increase in width of the ‘open pore zone’, one in April at the time of bud break, and a second in September”
Claim · model-written summary
Phloem exudate sugar concentration varied through the year, highest in March and lowest in May.
- Taxon
- Terminalia ivorensisTerminalia ivorensist0
- Outcome
- sugar concentration of the phloem exudatee0
- Direction
- higheste0
- Qualifier
- lowest in Maye0
Verbatim
t0“Terminalia ivorensis”
e0“The sugar concentration of the phloem exudate obtained from small cuts into the bark of the trees varied throughout the year. Concentrations were highest in March, during the dry season, and lowest in May, when the young leaves were expanding”