Abstract
Senescence of rice ( Oryza sativa L. cv. Jaya) leaves was regulated with kinetin and abscisic acid (ABA) sprays at the reproductive stage. The effect of such sprays on grain‐filling and yield was analyzed. Spraying 100‐day‐old plants with kinetin solution (100 μg ml ‐1 ) significantly delayed senescence as indicated by higher total chlorophyll and protein levels in the three uppermost leaves compared with the controls. In contrast, spraying with ABA (15 μg ml ‐1 ) significantly promoted foliar senescence. The number of spikelets per panicle, number of panicles, percentage filled grains, panicle weight and grain yield per plant and the mobilization and harvest indices were significantly increased by kinetin treatment, while ABA decreased most of them. The possibility of increased grain‐filling and thus, yield due to delayed foliar senescence by kinetin treatment and decreased grain‐filling due to hastening of senescence by ABA is discussed.
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Claims 7
Claim · model-written summary
Kinetin significantly delayed rice leaf senescence.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- leavese0
- Treatment
- kinetin solution (100 μg ml ‐1 )e0
- Outcome
- senescencee0
- Direction
- delayede0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying 100‐day‐old plants with kinetin solution (100 μg ml ‐1 ) significantly delayed senescence as indicated by higher total chlorophyll and protein levels in the three uppermost leaves compared with the controls.”
t0“rice”
Claim · model-written summary
Kinetin raised total chlorophyll and protein in the three uppermost rice leaves.
- Taxon
- riceOryza sativat0
- Organ / stage
- three uppermost leavese0
- Treatment
- kinetin solution (100 μg ml ‐1 )e0
- Outcome
- total chlorophyll and protein levelse0
- Direction
- highere0
- Comparator
- the controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying 100‐day‐old plants with kinetin solution (100 μg ml ‐1 ) significantly delayed senescence as indicated by higher total chlorophyll and protein levels in the three uppermost leaves compared with the controls.”
t0“rice”
Claim · model-written summary
ABA significantly promoted rice foliar senescence.
- Taxon
- riceOryza sativat0
- Treatment
- ABA (15 μg ml ‐1 )e0
- Outcome
- foliar senescencee0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast, spraying with ABA (15 μg ml ‐1 ) significantly promoted foliar senescence.”
t0“rice”
Claim · model-written summary
Kinetin significantly increased the number of rice spikelets per panicle, number of panicles and filled grain percentage.
- Taxon
- riceOryza sativat0
- Treatment
- kinetin treatmente0
- Outcome
- number of spikelets per panicle, number of panicles, percentage filled grainse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of spikelets per panicle, number of panicles, percentage filled grains, panicle weight and grain yield per plant and the mobilization and harvest indices were significantly increased by kinetin treatment, while ABA decreased most of them.”
t0“rice”
Claim · model-written summary
Kinetin significantly increased rice panicle weight and grain yield per plant.
- Taxon
- riceOryza sativat0
- Treatment
- kinetin treatmente0
- Outcome
- panicle weight and grain yield per plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of spikelets per panicle, number of panicles, percentage filled grains, panicle weight and grain yield per plant and the mobilization and harvest indices were significantly increased by kinetin treatment, while ABA decreased most of them.”
t0“rice”
Claim · model-written summary
Kinetin significantly increased rice mobilization and harvest indices.
- Taxon
- riceOryza sativat0
- Treatment
- kinetin treatmente0
- Outcome
- mobilization and harvest indicese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of spikelets per panicle, number of panicles, percentage filled grains, panicle weight and grain yield per plant and the mobilization and harvest indices were significantly increased by kinetin treatment, while ABA decreased most of them.”
t0“rice”
Claim · model-written summary
ABA decreased most of the listed rice yield and grain filling traits.
- Taxon
- riceOryza sativat0
- Treatment
- ABAe0
- Outcome
- most of theme0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of spikelets per panicle, number of panicles, percentage filled grains, panicle weight and grain yield per plant and the mobilization and harvest indices were significantly increased by kinetin treatment, while ABA decreased most of them.”
t0“rice”
The same questions in other papers
kinetin · yield · Oryza sativa (rice)Results differ
23 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- negative
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See all 26 papers →(+)-abscisic acid · quality: postharvest · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →kinetin · molecular: expression · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
2 papers more in this group
See all 6 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.