Abstract
SUMMARY The presence of awns doubled the net photosynthetic rate of wheat ears and also increased the proportion of 14 CO 2 assimilated by the ear that moved to the grain. The effect of water supply on photosynthesis and movement of assimilates was greater for leaves than ears, so that drought increased the proportion of assimilate contributed by ear photosynthesis to grain filling from 13% to 24% in the awnless ears, and from 34% to 43% in the awned ears. 14 C assimilated by the ears was most important to the economy of the upper spikelets and to the distal florets in each spikelet, whereas flag leaf assimilate went mainly to the spikelets in the lower half of the ear, and to the proximal florets. Awns increased grain yield in the dry but not in the irrigated treatment, despite the large contribution of awned ears to grain filling. Either the supply of assimilate did not limit grain yield when water supply was not limiting, or there were compensating disadvantages to awns. However, they did not seem to have any adverse effect on the development of the upper florets, nor did they reduce grain number per ear.
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Claims 12
Claim · model-written summary
Awns doubled net photosynthesis of wheat ears.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- presence of awnse0
- Outcome
- net photosynthetic rate of wheat earse0
- Direction
- doublede0
- Value
- doublede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of awns doubled the net photosynthetic rate of wheat ears”
Claim · model-written summary
Awns increased the fraction of ear-assimilated carbon moved to grain.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- awnse0
- Outcome
- proportion of 14 CO 2 assimilated by the ear that moved to the graine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of awns doubled the net photosynthetic rate of wheat ears and also increased the proportion of 14 CO 2 assimilated by the ear that moved to the grain”
t0“wheat”
Claim · model-written summary
Water supply affected leaf photosynthesis more than ear photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leavese0
- Outcome
- photosynthesise0
- Direction
- greatere0
- Comparator
- earse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of water supply on photosynthesis and movement of assimilates was greater for leaves than ears”
t0“wheat”
Claim · model-written summary
Water supply affected assimilate movement more in leaves than ears.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leavese0
- Outcome
- movement of assimilatese0
- Direction
- greatere0
- Comparator
- earse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of water supply on photosynthesis and movement of assimilates was greater for leaves than ears”
t0“wheat”
Claim · model-written summary
Drought increased ear contribution to grain filling from 13% to 24% in awnless ears.
- Taxon
- wheatTriticum aestivumt0
- Material
- awnless earse0
- Treatment
- droughte0
- Outcome
- proportion of assimilate contributed by ear photosynthesis to grain fillinge0
- Direction
- increasede0
- Value
- 13% to 24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought increased the proportion of assimilate contributed by ear photosynthesis to grain filling from 13% to 24% in the awnless ears”
t0“wheat”
Claim · model-written summary
Drought increased ear contribution to grain filling from 34% to 43% in awned ears.
- Taxon
- wheatTriticum aestivumt0
- Material
- awned earse0
- Treatment
- droughte0
- Outcome
- proportion of assimilate contributed by ear photosynthesis to grain fillinge0
- Direction
- increasede0
- Value
- 34% to 43%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought increased the proportion of assimilate contributed by ear photosynthesis to grain filling from 13% to 24% in the awnless ears, and from 34% to 43% in the awned ears”
t0“wheat”
Claim · model-written summary
Ear-assimilated carbon was most important to upper spikelets and distal florets.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- earse0
- Outcome
- most important to the economy of the upper spikelets and to the distal floretse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“14 C assimilated by the ears was most important to the economy of the upper spikelets and to the distal florets in each spikelet”
t0“wheat”
Claim · model-written summary
Flag leaf assimilate went mainly to lower spikelets and proximal florets.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- flag leafe0
- Outcome
- went mainly to the spikelets in the lower half of the ear, and to the proximal floretse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“flag leaf assimilate went mainly to the spikelets in the lower half of the ear, and to the proximal florets”
t0“wheat”
Claim · model-written summary
Awns increased grain yield under dry conditions.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Awnse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Qualifier
- in the drye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Awns increased grain yield in the dry but not in the irrigated treatment”
t0“wheat”
Claim · model-written summary
Awns did not increase grain yield under irrigation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Awnse0
- Outcome
- grain yielde0
- Direction
- note0
- Qualifier
- in the irrigated treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Awns increased grain yield in the dry but not in the irrigated treatment”
t0“wheat”
Claim · model-written summary
Awns showed no adverse effect on upper floret development.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- awnse0
- Outcome
- development of the upper floretse0
- Direction
- did not seem to have any adverse effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Awns increased grain yield in the dry but not in the irrigated treatment, despite the large contribution of awned ears to grain filling. Either the supply of assimilate did not limit grain yield when water supply was not limiting, or there were compensating disadvantages to awns. However, they did not seem to have any adverse effect on the development of the upper florets”
t0“wheat”
Claim · model-written summary
Awns did not reduce grain number per ear.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- awnse0
- Outcome
- grain number per eare0
- Direction
- did they reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Awns increased grain yield in the dry but not in the irrigated treatment, despite the large contribution of awned ears to grain filling. Either the supply of assimilate did not limit grain yield when water supply was not limiting, or there were compensating disadvantages to awns. However, they did not seem to have any adverse effect on the development of the upper florets, nor did they reduce grain number per ear”
t0“wheat”
The same questions in other papers
drought · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
40 papers in the same direction as this paper · 204 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- positive
242 papers more in this group
See all 246 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.