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タイトルヨミ
ヨウホ ノ ハツイク ニ オヨボス オンド ノ エイキョウ
日本語以外のタイトル
Effects of Temperature on the Development of Rice Panicles
ファイル
言語
英語
著者
内容記述(抄録等)
The relationship between temperature and spikelet number per panicle in rice was examined. Two experiments were conducted: Experiment 1)a treatment of air temperature(AT)and Experiment 2)a treatment of water temperature(WT). In experiment1, three regimes of AT were applied: High temperature,32/24℃(day/night); Medium temperature,29/21℃; Low temperature,26/18℃. In Experiment 2, three levels of WT(26,29,32℃)were applied in day. WT at night was not controlled independently from the AT. Dry weights were measured at the stage of spikelet differentiation. At heading, dry weights and the number of differentiated spikelets and primary and secondary rachis-branches per panicle were measured. High AT during the early reproductive stage reduced the number of differentiated spikelets. High AT did not decrease dry matter accumulation, but changed the allocation of dry matter among organs. High AT promoted dry matter accumulation to leaves, but decreased dry matter accumulation to tillers. Low WT increased the number of differentiated spikelets, but decreased the number of surviving spikelets through increasing of spikelet degeneration. The WT treatment little affected dry matter accumulation and partitioning among organs. 13C atom percents in leaf blades and leaf sheaths at heading were higher than those in panicles, which result suggested that carbohydrates assimilated at the stage of spikelet differentiation were translocated into actively growing organs such as leaves prior to young panicles. The role of temperature in spikelet differentiation was discussed.
掲載誌名
島根大学生物資源科学部研究報告
9
開始ページ
7
終了ページ
12
ISSN
13433644
発行日
2004-08-31
NCID
AA1112906X
出版者
島根大学生物資源科学部
出版者別表記
Shimane University, Faculty of Life and Environmental Science
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
業績ID
e18410
部局
生物資源科学部
備考
1-12+ / 1996-2007
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