Abstract
A pot experiment was conducte d to analyze the relationship between the size of each apical dome (AD) and the numbers of differentiated primary rachis-branches (PBs) and spikelets.Two rice cultivars were used : one was a heavy-panicle type 'Akenohoshi' and the other was a many-tillering type 'Nipponbare'.Rice plants were applied nitrogen (N) at various rates (75-600mg N pot-1 week-t) during the vegetative stage.The base diameter and the height of ADs were measured at the panicle initiation (PI) stage.At heading, the numbers of differentiated PBs, secondary rachis-branches (SBs), and spikelets were counted.The N treatment increased shoot N concentration in both cultivars.The N treatment increased the base diameter of AD in Akenohoshi at the PI stage, but not in Nipponbare.The ADs in Akenohoshi had a base diameter about 6.2/s larger on average than that in Nipponbare.The N treatment did not a{Iect AD height.In Akenohoshi, the plants with a larger AD base diameter differentiated more PBs per panicle and then differentiated more SBs and spikelets than did those plants with a smaller AD diameter.However, in Nipponbare, the N treatments did not affect the number of differentiated PBs per panicle.These results suggest that the AD size at the PI stage, which is enlarged by higher N nutrition in the vegetative stage, is a determinant of the number of differentiated PBs and spikelets and that a larger AD size is responsible for a higher number of PBs and spikelets in Akenohoshi.
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Claims 8
Claim · model-written summary
Nitrogen treatment increased shoot nitrogen concentration in both cultivars.
- Taxon
- rice
Oryza sativat0 - Treatment
- N treatmente0
- Outcome
- shoot N concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N treatment increased shoot N concentration in both cultivars”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Nitrogen increased apical dome base diameter in Akenohoshi at panicle initiation.
- Taxon
- riceOryza sativat0
- Material
- Akenohoshie0
- Organ / stage
- PI stagee0
- Treatment
- N treatmente0
- Outcome
- base diameter of ADe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N treatment increased the base diameter of AD in Akenohoshi at the PI stage”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Nitrogen did not increase apical dome base diameter in Nipponbare.
- Taxon
- riceOryza sativat0
- Material
- Nipponbaree0
- Treatment
- N treatmente1
- Outcome
- base diameter of ADe1
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not in Nipponbare”
e1“The N treatment increased the base diameter of AD in Akenohoshi at the PI stage”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Akenohoshi apical domes had a larger mean base diameter than Nipponbare apical domes.
- Taxon
- riceOryza sativat0
- Material
- Akenohoshie0
- Outcome
- base diametere0
- Direction
- largere0
- Value
- 6.2/se0
- Comparator
- Nipponbaree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ADs in Akenohoshi had a base diameter about 6.2/s larger on average than that in Nipponbare”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Nitrogen treatment did not affect apical dome height.
- Taxon
- riceOryza sativat0
- Treatment
- N treatmente0
- Outcome
- AD heighte0
- Direction
- did not a{Iecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N treatment did not a{Iect AD height”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Akenohoshi plants with larger apical dome bases differentiated more primary rachis branches per panicle.
- Taxon
- riceOryza sativat0
- Material
- Akenohoshie0
- Outcome
- PBs per paniclee0
- Direction
- moree0
- Comparator
- larger AD base diametere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Akenohoshi, the plants with a larger AD base diameter differentiated more PBs per panicle”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Akenohoshi plants with larger apical dome bases differentiated more secondary branches and spikelets.
- Taxon
- riceOryza sativat0
- Material
- Akenohoshie1
- Outcome
- SBs and spikeletse0
- Direction
- moree0
- Comparator
- smaller AD diametere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“then differentiated more SBs and spikelets than did those plants with a smaller AD diameter”
e1“The N treatment increased the base diameter of AD in Akenohoshi at the PI stage”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
Claim · model-written summary
Nitrogen treatments did not affect primary branch number per panicle in Nipponbare.
- Taxon
- riceOryza sativat0
- Material
- Nipponbaree0
- Treatment
- N treatmentse0
- Outcome
- number of differentiated PBs per paniclee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Nipponbare, the N treatments did not affect the number of differentiated PBs per panicle”
t0“Relationship between apical dome diameter at panicle initiation and the size of panicle components in rice grown under different nitrogen conditions during the Vegetative Stage”
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