Abstract
Source-sink manipulation could regulate the net photosynthetic rate (PN) of winter wheat after anthesis, however, the direction and magnitude of the regulation varied with time after anthesis. The PN was significantly increased by source reduction at the initial time of grain filling, but sink reduction had little influence on the PN, which suggested that the sink (spike) limitation did not occur at this time. Source-sink relation markedly affected PN during rapid grain filling. The PN was increased by source reduction and decreased by sink reduction significantly, which indicated that PN was closely associated with the change of source or sink size. The effect of source-sink manipulation on PN had some relationship with the occurrence of plant senescence at the time of late grain filling. Source reduction accelerated the senescence and dropped the PN, meanwhile, sink reduction delayed the senescence and promoted the PN. A direct relation between the effect of source-sink manipulation on PN and stomatal limitation was not found. Removing one quarter of leaves (RQ) had little influence on spike development after anthesis. In this case there was enough compensation in source production through photosynthesis. Removing one half of leaves (RH) made grain mass per spike and mass of grains lowered, especially the grain mass in the top and base positions of spike declined markedly. The source supply was grain-limiting. Removing one quarter of spikelets (RS) was beneficial to grain-setting in the remaining spikelets, leading to the increase of grain mass. Thus promoting the source supply of photosynthates after anthesis is of major importance for grain to set and to develop.
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Claims 15
Claim · model-written summary
Source reduction increased photosynthetic rate early in grain filling.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- source reductione0
- Outcome
- PNe0
- Direction
- increasede0
- Qualifier
- initial time of grain fillinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PN was significantly increased by source reduction at the initial time of grain filling”
t0“winter wheat”
Claim · model-written summary
Sink reduction had little effect on photosynthetic rate early in grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- sink reductione0
- Outcome
- PNe0
- Direction
- little influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sink reduction had little influence on the PN”
t0“winter wheat”
Claim · model-written summary
Source reduction significantly increased photosynthetic rate during rapid grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- source reductione0
- Outcome
- PNe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PN was increased by source reduction and decreased by sink reduction significantly”
t0“winter wheat”
Claim · model-written summary
Sink reduction significantly decreased photosynthetic rate during rapid grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- sink reductione0
- Outcome
- PNe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PN was increased by source reduction and decreased by sink reduction significantly”
t0“winter wheat”
Claim · model-written summary
Source reduction accelerated senescence late in grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Source reductione0
- Outcome
- senescencee0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Source reduction accelerated the senescence and dropped the PN”
t0“winter wheat”
Claim · model-written summary
Source reduction lowered photosynthetic rate late in grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Source reductione0
- Outcome
- PNe0
- Direction
- droppede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Source reduction accelerated the senescence and dropped the PN”
t0“winter wheat”
Claim · model-written summary
Sink reduction delayed senescence late in grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- sink reductione0
- Outcome
- senescencee0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sink reduction delayed the senescence and promoted the PN”
t0“winter wheat”
Claim · model-written summary
Sink reduction promoted photosynthetic rate late in grain filling.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- sink reductione0
- Outcome
- PNe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sink reduction delayed the senescence and promoted the PN”
t0“winter wheat”
Claim · model-written summary
No direct relation between manipulation effects on photosynthesis and stomatal limitation was found.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- source-sink manipulatione0
- Outcome
- direct relation between the effect of source-sink manipulation on PN and stomatal limitatione0
- Direction
- not founde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A direct relation between the effect of source-sink manipulation on PN and stomatal limitation was not found”
t0“winter wheat”
Claim · model-written summary
Removing one quarter of leaves had little influence on spike development.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Removing one quarter of leaves (RQ)e0
- Outcome
- spike developmente0
- Direction
- little influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing one quarter of leaves (RQ) had little influence on spike development after anthesis”
t0“winter wheat”
Claim · model-written summary
Removing one half of leaves lowered grain mass per spike and mass of grains.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Removing one half of leaves (RH)e0
- Outcome
- grain mass per spike and mass of grainse0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing one half of leaves (RH) made grain mass per spike and mass of grains lowered”
t0“winter wheat”
Claim · model-written summary
Removing half the leaves markedly reduced grain mass in top and base spike positions.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Removing one half of leaves (RH)e1
- Outcome
- grain mass in the top and base positions of spikee0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially the grain mass in the top and base positions of spike declined markedly”
t0“winter wheat”
e1“Removing one half of leaves (RH)”
Claim · model-written summary
Removing one quarter of spikelets improved grain setting in remaining spikelets.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Removing one quarter of spikelets (RS)e0
- Outcome
- grain-setting in the remaining spikeletse0
- Direction
- beneficiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing one quarter of spikelets (RS) was beneficial to grain-setting in the remaining spikelets”
t0“winter wheat”
Claim · model-written summary
Removing one quarter of spikelets increased grain mass.
- Taxon
- winter wheatTriticum aestivumt0
- Treatment
- Removing one quarter of spikelets (RS)e0
- Outcome
- grain masse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing one quarter of spikelets (RS) was beneficial to grain-setting in the remaining spikelets, leading to the increase of grain mass”
t0“winter wheat”
Claim · model-written summary
The authors recommend increasing photosynthate source supply after anthesis for grain development.
- Taxon
- winter wheatTriticum aestivumt0
- Outcome
- promoting the source supply of photosynthates after anthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoting the source supply of photosynthates after anthesis is of major importance for grain to set and to develop”
t0“winter wheat”
The same questions in other papers
humidity · yield · Triticum aestivum (wheat)Positive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 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.