Abstract
Two pot experiments and one field experiment were conducted on sugarcane to assess the effects of treatments expected to change total carbon assimilation on the partitioning of assimilate.In the first experiment pots of cultivars CP and N14 were arranged to simulate normal field spacing.At 5 months, plants were partially defoliated or left intact.In the subsequent four months, defoliation resulted in a small (not significant) decrease in total dry mass increment; it increased the proportional partitioning of assimilates to leaves in N14, whilst in CP it increased the proportional partitioning to stems.In both cultivars defoliation increased proportional allocation to non-structural dry matter, and thus sucrose, in the stem.In the second experiment pots of cv.CP were grown at normal spacing for 4 months, then left untreated, shaded, or placed further apart.During the subsequent four months shading decreased total dry matter increment, but increased proportional partitioning to the stems, and within stems to non-structural dry matter, and so sucrose.Widened spacing increased total assimilation, but decreased proportional allocation to stems; partitioning within the stems was not affected.In the field experiment plants of both cultivars were partially defoliated at 6 months, or left intact.Defoliation resulted in only a very small decrease in stem dry mass increment during the subsequent four months (leaves were not measured).Within the stem partial defoliation caused proportionally increased partitioning to non-structural dry matter, hence to sucrose.The results suggest that sucrose storage receives priority in the allocation of assimilate, rather than representing the accumulation of assimilate not required for vegetative growth.
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Claims 12
Claim · model-written summary
Defoliation caused a small, nonsignificant decrease in total dry mass increment.
- Taxon
- sugarcanet0
- Treatment
- defoliatione0
- Outcome
- total dry mass incremente0
- Direction
- decreasee0
- Qualifier
- smalle0
Not reportedComparator
Verbatim
e0“defoliation resulted in a small (not significant) decrease in total dry mass increment”
t0“sugarcane”
Claim · model-written summary
Defoliation increased proportional assimilate partitioning to leaves in N14.
- Taxon
- sugarcanet0
- Material
- N14e0
- Treatment
- defoliatione1
- Outcome
- proportional partitioning of assimilates to leavese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“it increased the proportional partitioning of assimilates to leaves in N14”
t0“sugarcane”
e1“defoliation resulted in a small (not significant) decrease in total dry mass increment”
Claim · model-written summary
Defoliation increased proportional assimilate partitioning to stems in CP.
- Taxon
- sugarcanet0
- Material
- CPe0
- Treatment
- defoliatione1
- Outcome
- proportional partitioning to stemse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“whilst in CP it increased the proportional partitioning to stems”
t0“sugarcane”
e1“defoliation resulted in a small (not significant) decrease in total dry mass increment”
Claim · model-written summary
Defoliation increased proportional allocation to nonstructural dry matter and sucrose in the stem in both cultivars.
- Taxon
- sugarcanet0
- Treatment
- defoliatione0
- Outcome
- proportional allocation to non-structural dry matter, and thus sucrose, in the steme0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“In both cultivars defoliation increased proportional allocation to non-structural dry matter, and thus sucrose, in the stem”
t0“sugarcane”
Claim · model-written summary
Shading decreased total dry matter increment.
Not reportedComparator
Verbatim
e0“shading decreased total dry matter increment”
t0“sugarcane”
Claim · model-written summary
Shading increased proportional allocation to stems and their nonstructural dry matter and sucrose.
- Taxon
- sugarcanet0
- Treatment
- shadinge0
- Outcome
- proportional partitioning to the stems, and within stems to non-structural dry matter, and so sucrosee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“shading decreased total dry matter increment, but increased proportional partitioning to the stems, and within stems to non-structural dry matter, and so sucrose”
t0“sugarcane”
Claim · model-written summary
Widened spacing increased total assimilation.
Not reportedComparator
Verbatim
e0“Widened spacing increased total assimilation”
t0“sugarcane”
Claim · model-written summary
Widened spacing decreased proportional allocation to stems.
- Taxon
- sugarcanet0
- Treatment
- Widened spacinge0
- Outcome
- proportional allocation to stemse0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Widened spacing increased total assimilation, but decreased proportional allocation to stems”
t0“sugarcane”
Claim · model-written summary
Widened spacing did not affect partitioning within stems.
- Taxon
- sugarcanet0
- Treatment
- Widened spacinge1
- Outcome
- partitioning within the stemse0
- Direction
- not affectede0
Not reportedComparator
Verbatim
e0“partitioning within the stems was not affected”
t0“sugarcane”
e1“Widened spacing increased total assimilation”
Claim · model-written summary
Field defoliation caused only a very small decrease in stem dry mass increment.
- Taxon
- sugarcanet0
- Treatment
- Defoliatione0
- Outcome
- stem dry mass incremente0
- Direction
- decreasee0
- Qualifier
- only a very smalle0
Not reportedComparator
Verbatim
e0“Defoliation resulted in only a very small decrease in stem dry mass increment”
t0“sugarcane”
Claim · model-written summary
Field defoliation increased stem allocation to nonstructural dry matter and sucrose.
- Taxon
- sugarcanet0
- Treatment
- partial defoliatione0
- Outcome
- partitioning to non-structural dry matter, hence to sucrosee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Within the stem partial defoliation caused proportionally increased partitioning to non-structural dry matter, hence to sucrose”
t0“sugarcane”
Claim · model-written summary
Authors infer that sucrose storage has priority in assimilate allocation.
Verbatim
e0“The results suggest that sucrose storage receives priority in the allocation of assimilate”
t0“sugarcane”
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See all 9 papers →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.