Effects of high temperature treatment on the flowering of Japonica rise on pollen germination.
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Accession number;00A0428651
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| Title;Effects of high temperature treatment on the flowering of Japonica rise on pollen germination. |
| Author;
MOROKUMA MASAHIRO
(Fac. of Agric., Kagawa Univ.)
TAO KEIKO
(Fac. of Agric., Kagawa Univ.)
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Journal Title;Technical Bulletin of Faculty of Agriculture, Kagawa University
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Journal Code:G0765A
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ISSN:0368-5128
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VOL.52;NO.;PAGE.97-103(2000)
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| Figure&Table&Reference;FIG.8, TBL.4, REF.17 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The effects of high temperature treatment on the flowering of five japonica rice cultivars on pollen germination were investigated. The study focussed on the effect high temperature had on pollen germination on the stigmas of spikelets and their growth on culture medium. In high temperature treatment at 35.DEG.C., spikelet fertility, amongst all cultivars was averaged, and observed to have decreased by about 10% below the control. The largest decline in spikelet fertility was observed in Koganebare. The number of germinated pollen grains on the stigmas of spikelets varied greatly amongst the cultivars, yet similar tendencies of germination were observed in individual treatment conditions. Koganebare showed the greatest decrease in the percentage of pollen germination on the stigmas of spikelets during the 35.DEG.C. heat treatment, compared with that of the control. This can be attributed to the few number of pollen grains shed on the stigmas of spikelets. Amongst all cultivars, the average percentage of pollen germination on culture medium at 35.DEG.C. heat treatment, was similar to the control, yet differed among the cultivars tending to be lower in Koganebare. After pollen shedding on culture medium, there were large differences in the percentage of pollen germination, after 5 minutes, amongst the cultivars. These were averaged together and observed to be greater than the control percentage of pollen germination at 35.DEG.C. heat treatment. No differences amongst the cultivars were observed after 10 minutes of pollen germination. In Koganebare, the growth of pollen tubes on culture medium was observed to be below that of the other cultivars and the length of the anthers appeared shortened. (author abst.) |
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