Abstract
The effects of kinetin and gibberellin were examined under anaerobic conditions (0 % oxygen) and aerobic conditions (20 % oxygen) on the germination of dehusked seeds of indica and japonica rice cultivars that had been harvested at different times during the formation of seeds. Surjamkhi was used as a representative of deep dormant indica cultivars and Assam IV as a less dormant indica cultivar. Sasanishiki was used as the japonica rice cultivar. Both phytohormones were applied at a concentration of 10 -$ which proved to have the greatest stimulatory effect in preliminary work at concentrations of 10 -$ -10 -& . Under aerobic conditions, inhibition of germination by dehusking of Sasanishiki seeds that had been harvested either 30 or 60 d after anthesis was overcome by kinetin and all seeds germinated. Complete germination induced by kinetin under aerobic conditions was also achieved with the dehusked seeds of the indica rice cultivar Assam IV that had been harvested on two occasions and of Surjamkhi that had been harvested 28 d after anthesis. In contrast, germination of dehusked japonica seeds stimulated by anaerobiosis was inhibited by kinetin. The stimulatory effects of gibberellin on the germination of indica and japonica rice seeds were observed under aerobic and anaerobic conditions. Under anaerobic conditions, the responses of dehusked indica and japonica rice seeds to kinetin and gibberellin differed, being negative with kinetin and positive with gibberellin. Under aerobic conditions, the stimulatory effects of kinetin on germination of dehusked seeds were greater than those of gibberellin. Thus, treatment with kinetin appears to be useful for breaking the considerable dormancy commonly observed in the dehusked seeds of indica rice. Mechanisms are proposed to explain the stimulatory effects of these phytohormones on the germination of dehusked seeds of indica and japonica rice under aerobic and anaerobic conditions.
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Claims 8
Claim · model-written summary
Under aerobic conditions, kinetin overcame dehusking inhibition of Sasanishiki seed germination; all seeds germinated.
- Taxon
- Rice
Oryza sativat0 - Material
- Sasanishikie0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- overcomee0
- Value
- all seedse0
- Qualifier
- 30 or 60 d after anthesise0
- Comparator
- dehuskinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under aerobic conditions, inhibition of germination by dehusking of Sasanishiki seeds that had been harvested either 30 or 60 d after anthesis was overcome by kinetin and all seeds germinated”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Under aerobic conditions, kinetin induced complete germination of dehusked Assam IV seeds harvested on two occasions.
- Taxon
- RiceOryza sativat0
- Material
- Assam IVe0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- Completee0
- Qualifier
- under aerobic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Complete germination induced by kinetin under aerobic conditions was also achieved with the dehusked seeds of the indica rice cultivar Assam IV that had been harvested on two occasions”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Under aerobic conditions, kinetin induced complete germination of dehusked Surjamkhi seeds harvested 28 days after anthesis.
- Taxon
- RiceOryza sativat0
- Material
- Surjamkhie0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- Completee0
- Qualifier
- 28 d after anthesise0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Complete germination induced by kinetin under aerobic conditions was also achieved with the dehusked seeds of the indica rice cultivar Assam IV that had been harvested on two occasions and of Surjamkhi that had been harvested 28 d after anthesis”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Under anaerobic conditions, kinetin inhibited germination of dehusked japonica seeds.
- Taxon
- RiceOryza sativat0
- Material
- japonicae0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- inhibitede0
- Comparator
- anaerobiosise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination of dehusked japonica seeds stimulated by anaerobiosis was inhibited by kinetin”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Gibberellin stimulated indica seed germination under aerobic and anaerobic conditions.
- Taxon
- RiceOryza sativat0
- Material
- indicae0
- Treatment
- gibberelline0
- Outcome
- germinatione0
- Direction
- stimulatorye0
- Qualifier
- under aerobic and anaerobic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulatory effects of gibberellin on the germination of indica and japonica rice seeds were observed under aerobic and anaerobic conditions”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Gibberellin stimulated japonica seed germination under aerobic and anaerobic conditions.
- Taxon
- RiceOryza sativat0
- Material
- japonicae0
- Treatment
- gibberelline0
- Outcome
- germinatione0
- Direction
- stimulatorye0
- Qualifier
- under aerobic and anaerobic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stimulatory effects of gibberellin on the germination of indica and japonica rice seeds were observed under aerobic and anaerobic conditions”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
Under aerobic conditions, kinetin stimulated germination more than gibberellin.
- Taxon
- RiceOryza sativat0
- Treatment
- kinetine0
- Outcome
- germinatione0
- Direction
- greatere0
- Qualifier
- Under aerobic conditionse0
- Comparator
- gibberelline0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under aerobic conditions, the stimulatory effects of kinetin on germination of dehusked seeds were greater than those of gibberellin”
t0“Rice (Oryza sativaL.)”
Claim · model-written summary
The authors proposed kinetin for breaking dormancy in dehusked indica rice seeds.
- Taxon
- RiceOryza sativat0
- Material
- indicae0
- Treatment
- kinetine0
- Outcome
- breaking the considerable dormancye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with kinetin appears to be useful for breaking the considerable dormancy commonly observed in the dehusked seeds of indica rice”
t0“Rice (Oryza sativaL.)”
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- no effect
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See all 80 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.