Physiological characteristics of rice cultivar oochikara and its short-root near isogenic line IL-srt1

Rengui Zhao, Jian Liu, Fumitaka Shiotsu, Masanori Toyota, Akihito Kusutani, Shin Taketa, Masahiko Ichii

研究成果: Article

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The shoot and root characters, the bleeding rate and the photosynthetic rate in flag leaves of rice cultivar Oochikara were compared with its short-root near isogenic line IL-srt1 at the heading stage. The bleeding rate per plant in IL-srt1 was only 56% of that in Oochikara. The total root length and total root weight in IL-srt1 were 30% and 35% of those in Oochikara, respectively. On the other hand, the bleeding rate per total root length and that per total root weight in IL-srt1 were 188% and 163% of those in Oochikara, respectively, showing a significant difference between the two lines. Thus, although the root mass was larger in Oochikara than in IL-srt1, the bleeding rate per unit root mass was higher in IL-srt1 than in Oochikara. These results suggest that the physiological activities of total root in IL-srt1 were lower than that in Oochikara, due to the smaller root mass, and that IL-srt1 had higher physiological activities per unit root mass than Oochikara. There was no significant difference in photosynthetic rate between the two lines, suggesting that the short-root gene srt1 did not affect the photosynthesis.

元の言語English
ページ(範囲)148-152
ページ数5
ジャーナルJapanese Journal of Crop Science
75
発行部数2
DOI
出版物ステータスPublished - 23 6 2006

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