Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.)
The combined effects of high nitrogen supply, cool temperature regimes and shading on factors related to fertility in rice plants were investigated. High nitrogen supply during the period from the spikelet differentiation stage to the young microspore stage caused a decrease in the number of microsp...
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2000-01-01
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Online Access: | http://dx.doi.org/10.1626/pps.3.323 |
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doaj-15d588cf51cd4e8f914104dda670cc082020-11-25T01:16:07ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082000-01-013332332710.1626/pps.3.32311644435Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.)Takami Hayashi0Kazunari Kashiwabara1Tomoya Yamaguchi2Setsuo Koike3Tohoku National Agricultural Experiment StationNorthern Area Farming Research InstituteTohoku National Agricultural Experiment StationTohoku National Agricultural Experiment StationThe combined effects of high nitrogen supply, cool temperature regimes and shading on factors related to fertility in rice plants were investigated. High nitrogen supply during the period from the spikelet differentiation stage to the young microspore stage caused a decrease in the number of microspores per anther. High nitrogen supply plus cool treatment at the young microspore stage (12°C for 3 or 4 days) resulted in a conspicuous decrease in the number of engorged pollen grains per anther. Shading also decreased the number of microspores and pollen grains. The lowest numbers of microspores and pollen grains were observed in a treatment combining high nitrogen supply with shading and cooling. The number of pollen grains shed on the stigma and germinated pollen grains were decreased by cooling. These results suggested that the lower fertility due to high nitrogen supply combined with cooling resulted from 1) decrease in number of microspores, 2) large decrease in number of pollen grains per anther, and 3) decreases in number of pollen grains and germinated pollen grains on the stigma.http://dx.doi.org/10.1626/pps.3.323CoolingMale sterilityMicrosporeNitrogenPollenRiceShading |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Takami Hayashi Kazunari Kashiwabara Tomoya Yamaguchi Setsuo Koike |
spellingShingle |
Takami Hayashi Kazunari Kashiwabara Tomoya Yamaguchi Setsuo Koike Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) Plant Production Science Cooling Male sterility Microspore Nitrogen Pollen Rice Shading |
author_facet |
Takami Hayashi Kazunari Kashiwabara Tomoya Yamaguchi Setsuo Koike |
author_sort |
Takami Hayashi |
title |
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) |
title_short |
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) |
title_full |
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) |
title_fullStr |
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) |
title_full_unstemmed |
Effects of High Nitrogen Supply on the Susceptibility to Coolness at the Young Microspore Stage in Rice (Oryza sativa L.) |
title_sort |
effects of high nitrogen supply on the susceptibility to coolness at the young microspore stage in rice (oryza sativa l.) |
publisher |
Taylor & Francis Group |
series |
Plant Production Science |
issn |
1343-943X 1349-1008 |
publishDate |
2000-01-01 |
description |
The combined effects of high nitrogen supply, cool temperature regimes and shading on factors related to fertility in rice plants were investigated. High nitrogen supply during the period from the spikelet differentiation stage to the young microspore stage caused a decrease in the number of microspores per anther. High nitrogen supply plus cool treatment at the young microspore stage (12°C for 3 or 4 days) resulted in a conspicuous decrease in the number of engorged pollen grains per anther. Shading also decreased the number of microspores and pollen grains. The lowest numbers of microspores and pollen grains were observed in a treatment combining high nitrogen supply with shading and cooling. The number of pollen grains shed on the stigma and germinated pollen grains were decreased by cooling. These results suggested that the lower fertility due to high nitrogen supply combined with cooling resulted from 1) decrease in number of microspores, 2) large decrease in number of pollen grains per anther, and 3) decreases in number of pollen grains and germinated pollen grains on the stigma. |
topic |
Cooling Male sterility Microspore Nitrogen Pollen Rice Shading |
url |
http://dx.doi.org/10.1626/pps.3.323 |
work_keys_str_mv |
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