Abstract
Among soft red winter wheat (Triticum aestivum L.) cultivars, compensatory kernel set does not occur with 50% spikelet removal (SR) at anthesis, but there are differential responses in final kernel mass. It seems that these cultivar differences resulted from sink limitations for nonresponsive cultivars and from source limitations for responsive cultivars. Individual kernel masses and kernel growth rates of sink-limited cultivars are not expected to respond to an increased ratio of source to sink and should be less affected than source-limited cultivars when this ratio is reduced. To compare kernel growth traits of six cultivars that differed in response to 50% SR in a previous experiment, a range of SR treatments and defoliation were used to manipulate ratios of source to sink. Two field experiments were conducted for four years. In the first experiment, all spikes on a plant had 0, 25, 50, 75 and 100% SR treatments at anthesis. In the second experiment, sink size was reduced at anthesis by restricting 50% SR to a single culm, and source size was reduced at anthesis by removing all leaf blades from a single culm. Partial SR increased final kernel mass of only responsive cultivars (15–25%), but differences in final kernel mass between the 50 and 75% SR-treated plants were not significant. At maturity, water-soluble carbohydrate levels in stems of all cultivars with 75% SR were less than or equal to those with 100% SR, but greater than those with ≤ 50% SR. Partial SR increased the kernel growth rate of responsive cultivars, which increased the final mass of individual kernels. Kernel N concentrations also were increased. Defoliation decreased kernel growth rate and individual kernel mass of all cultivars; relative decreases were greater for responsive cultivars than for nonresponsive cultivars. The mass and kernel growth rate of individual kernels of responsive cultivars were normally source-limited, while source and sink strengths of nonresponsive cultivars were more closely balanced than those of responsive cultivars.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Half spikelet removal at anthesis did not induce compensatory kernel set.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- 50% spikelet removal (SR) at anthesise0
- Outcome
- compensatory kernel sete0
- Direction
- does not occure0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compensatory kernel set does not occur with 50% spikelet removal (SR) at anthesis”
t0“wheat”
Claim · model-written summary
Partial spikelet removal increased final kernel mass by 15–25% only in responsive cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- responsive cultivarse0
- Treatment
- Partial SRe0
- Outcome
- final kernel masse0
- Direction
- increasede0
- Value
- 15–25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Partial SR increased final kernel mass of only responsive cultivars (15–25%)”
t0“wheat”
Claim · model-written summary
Final kernel mass did not differ significantly between 50% and 75% spikelet removal.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 75% SR-treated plantse0
- Outcome
- final kernel masse0
- Comparator
- 50e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences in final kernel mass between the 50 and 75% SR-treated plants were not significant”
t0“wheat”
Claim · model-written summary
At maturity, stem water-soluble carbohydrates with 75% removal were no greater than with 100% removal.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 75% SRe0
- Outcome
- water-soluble carbohydrate levels in stemse0
- Direction
- less than or equal toe0
- Comparator
- 100% SRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water-soluble carbohydrate levels in stems of all cultivars with 75% SR were less than or equal to those with 100% SR”
t0“wheat”
Claim · model-written summary
At maturity, stem water-soluble carbohydrates with 75% removal exceeded those with at most 50% removal.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 75% SRe1
- Outcome
- water-soluble carbohydrate levels in stemse1
- Direction
- greater thane0
- Comparator
- ≤ 50% SRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater than those with ≤ 50% SR”
e1“water-soluble carbohydrate levels in stems of all cultivars with 75% SR”
t0“wheat”
Claim · model-written summary
Partial spikelet removal increased kernel growth rate in responsive cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- responsive cultivarse0
- Treatment
- Partial SRe0
- Outcome
- kernel growth ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Partial SR increased the kernel growth rate of responsive cultivars”
t0“wheat”
Claim · model-written summary
Partial spikelet removal increased kernel nitrogen concentration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Partial SRe1
- Outcome
- Kernel N concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kernel N concentrations also were increased.”
e1“Partial SR increased the kernel growth rate of responsive cultivars”
t0“wheat”
Claim · model-written summary
Defoliation decreased kernel growth rate and kernel mass across cultivars.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Defoliatione0
- Outcome
- kernel growth rate and individual kernel masse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation decreased kernel growth rate and individual kernel mass of all cultivars”
t0“wheat”
Claim · model-written summary
Defoliation caused greater relative kernel declines in responsive cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- responsive cultivarse0
- Treatment
- Defoliatione1
- Outcome
- kernel growth rate and individual kernel masse1
- Direction
- greatere0
- Comparator
- nonresponsive cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative decreases were greater for responsive cultivars than for nonresponsive cultivars”
e1“Defoliation decreased kernel growth rate and individual kernel mass of all cultivars”
t0“wheat”
Claim · model-written summary
Responsive cultivar kernel mass and growth rate were normally source-limited.
- Taxon
- wheatTriticum aestivumt0
- Material
- responsive cultivarse0
- Outcome
- mass and kernel growth rate of individual kernelse0
- Qualifier
- source-limitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mass and kernel growth rate of individual kernels of responsive cultivars were normally source-limited”
t0“wheat”
Claim · model-written summary
Nonresponsive cultivars had more balanced source and sink strengths than responsive cultivars.
- Taxon
- wheatTriticum aestivumt0
- Material
- nonresponsive cultivarse0
- Outcome
- source and sink strengthse0
- Direction
- more closely balancede0
- Comparator
- responsive cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“source and sink strengths of nonresponsive cultivars were more closely balanced than those of responsive cultivars”
t0“wheat”
The same questions in other papers
pruning · growth · Triticum aestivum (wheat)Positive and negative results
22 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
29 papers more in this group
See all 33 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.