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| Registros recuperados: 16 | |
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| 長, 学; 柳沢, 朗; 菅原, 章人; 加藤, 清明; 三浦, 秀穂; Osa, M; Yanagisawa, A; Sugawara, A; Kato, K; Miura, H. |
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Palavras-chave: Triticum aestivum L.; Wxタンパク質; アミロース含量; 粗蛋白質含量; 糊化特性; 遺伝子型×環境の相互作用; Wx protein; Amylose content; Protein content; Starch-pasting property; Genotype x environment interaction. |
| Ano: 2002 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/117 |
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| 加藤, 清明. |
| 植物のバイオマスを決定する要因に枝分かれ（イネ科植物では分げつ）がある。 枝分かれは、腋芽（分げつ芽）の形成とそれに続く伸長の2 段階で制御される。 植物は、周囲の環境に応答した遺伝子発現とタンパク質合成、そしてオーキシン、サイトカイニン、ストリゴラクトンなどの植物ホルモンの相互作用により分げつ芽の伸長を制御するものと考えられている。例えば、伸長抑制にはたらく転写調節因子FC1(OsTB1)は、これら3 種の植物ホルモンの下流で統合因子としてはたらくことが知られている (Minakuchi et al., 2010)。これらの分げつ伸長経路の解明には、イネの枝分かれの多い多分げつ突然変異体が利用されてきた(Umehara et al., 2010)。我々の研究グループでは、枝分かれの少なくなったイネの少分げつ突然変異体を利用して分げつ伸長経路の理解を深めたいと考えている。これまでに、50 系統あまりの少分げつ突然変異体を選抜し、このうち、遺伝子分析と対立性検定により6 種類の劣性遺伝子rcn1 からrcn6 を報告した(高牟礼ら 1999)。二重変異体の解析から、少なくともこれら6 種の遺伝子が、ストリゴラクトンおよび統合因子FC1 を介した経路とは独立にはたらくことがわかった(Yasuno et al., 2007; Ariyaratne et al., 2009;未発表)。rcn1 は、ABC タンパク質サブグループG に属するOsABCG5 をコード し、このサブグループで最初に報告されたショウジョウバエの白眼突然変異体の原因遺伝子であるwhite タンパク質(P10090)と39.9％の類似性を示した（Yasuno et al., 2009）。ABCG... |
| Ano: 2011 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3057 |
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| Ureshi, An-na; Matuda, Shuichi; Ohashi, Emiko; Onishi, Kazumitsu; Takamure, Itsuro; Kato, Kiyoaki; 大西, 一光; 加藤, 清明. |
| Plants constantly sense changes in their environment. When nutrient elements are scarce, plants often allocate a greater proportion of their biomass to the root system. In the present study, we characterized the early root development of rice reduced culm number (rcn) mutants under standard growth conditions. Short lateral root length was consistent in five rcn mutants, and the remaining root traits varied between the rcn mutants. Subsequently, we characterized the effects of rcn1 mutation in response to nutrient shortage. Root development, involving the elongation of seminal, crown, and lateral roots and branching of the lateral roots, was promoted in wild type in response to nutrient shortage. However, in rcn1 mutants, crown root elongation was constant... |
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Palavras-chave: Nutrient shortage; RCN1/OsABCG5; Reduced culm number; Rice; Root architecture. |
| Ano: 2012 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3823 |
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| Oikawa, Ai; Nagai, Kazuya; Kato, Kiyoaki; Kidou, Shin-ichiro; 加藤, 清明. |
| P23k is a monocot-unique protein that is highly expressed in barley. Our previous loss-of-function studies in barley leaves indicated that P23k, localized to tissues where cell wall polysaccharides accumulate, might contribute to secondary wall formation in the leaf. However, the P23k loss-of-function analysis was limited to the leaf, which is a vegetative organ. Considering the involvement of P23k in secondary wall formation, a dramatically altered phenotype is expected in the stem of P23k gene-silenced barley, where marked secondary wall deposition occurs during the reproductive growth stage. To test this hypothesis, barley striped mosaic virus-based virus-induced gene silencing of P23k was performed. Abnormal tiller formation and arrested intercalary... |
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Palavras-chave: Hordeum vulgare P23k virus-induced gene silencing secondary wall formation (1 3; 1 4)-β-D-glucan tiller intercalary elongation. |
| Ano: 2009 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2692 |
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| Kottearachchi, NS; Uchino, N.; Kato, Kiyoaki; Miura, Hideho; 加藤, 清明; 三浦, 秀穂. |
| White-grained wheat cultivars have long been recognized to be less resistant to preharvest sprouting (PHS) than the red-grained ones. Previously two QTLs for grain dormancy, QPhs.ocs-3A.1 (QPhs-3AS) and QPhs.ocs-4A.1 (QPhs-4AL) were identified in a highly dormant Japanese red wheat, Zenkoujikomugi (Zen). Aiming at improvement of PHS tolerance in white-grained wheat, the introgression effect of these two QTLs in a white-grained population consisting of 40 recombinant inbred lines (RILs) developed from a cross between Zen and white-grained Spica was examined here. Random 20 RILs with red grains were also developed from the same cross and used as a control population. The RILs were grown in the field and in the glasshouse to evaluate the grain dormancy by... |
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Palavras-chave: Grain dormancy; Molecular marker; QTL; Triticum aestivum; White-grained wheat. |
| Ano: 2006 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/714 |
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| Registros recuperados: 16 | |
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