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Title Transcription
カイカキ ノ コウオン ニヨル スイトウ ノ ネンジツ ショウガイ ニツイテ
Title Alternative (English)
Sterility Caused by High Temperature at Flowering in Rice Plants
File
language
jpn
Author
Imaki, Tadashi
Jyokei, Kazuyoshi
Yamada, Ichiro
Description
In this study, two experiments were conducted to investigate the mechanism of high temperature-induced sterility at flowering in rice plants, comparing the varietal differnces in occurrences of sterility. Six rice varieties were used ; Nipponbare, Koshihikari, Asahi, Coloro 2, Brirish Honduras, and Milyang 23.
The results obtained were as follows ;
1. There were considerable differences among varieties in the peak time of spikelets opening during the day, under the condition of high temperature (39℃).
2. The spikelets of Milyang 23 opened 2 hours or more earlier than those of the other varieties, and about a third of spikelets had flowered in the condition before the treatment of 39℃. The advancement of spikelets opening time would be contributed to avoidance of the sterility induced by high temperature. The percentage of ripened grains in this variety was 7.7% in the 39℃ treatment for 6 hours, whereas, in other varieties, it was in a range of 0-2%.
3. The most spikelets of British Honduras opened under 39℃ treatment. In this variety, the number of full ripened grains were extremely decreased, and the most of nonripened grains were not fertilized. As a smal number of pollen grains were observed on the stigma, the dehiscences of anthers would be incomplete, and pollens would not be shedded mostly under high temperature treatment of 39℃.
4. In Japonica varieties including Coloro 2, many spikelets opened at the time just after the 39℃ treatment. However, there were many imperfectly ripened grains, which would not develop during about 6 days after anthesis. Although many spikelets of Japonica varieties did not opened under 39℃ treatment, the dehiscences of anthers were seemed to be inhibitted by a high temperature before anthesis. Therefore, the percentage of ripened grains would be decreased in the 39℃ treatment.
Journal Title
Bulletin of the Faculty of Agriculture, Shimane University
Volume
17
Start Page
1
End Page
7
ISSN
0370940X
Published Date
1983-12-20
NCID
AN00108015
Publisher
島根大学農学部
Publisher Aalternative
Shimane University, Faculty of Agriculture
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science
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