The transition from vegetative growth to reproductive development is a complex process that requires an integrated response to multiple environmental cues and endogenous signals. In Arabidopsis thaliana, which has a facultative requirement for vernalization and long days, the genes of the autonomous pathway function as floral promoters by repressing the central repressor and vernalization-regul...

Silicosis and coal worker's pneumoconiosis are serious occupational respiratory diseases associated with the coal mining industry and the inhalation of respirable dusts containing crystalline silica. The purpose of this study (funded by the Mine Health and Safety Council of South Africa) was to evaluate the individual contributions of underground coal mining tasks to the respirable dust and res...

冬季積雪地域である富山県砺波市および新潟県上越市で秋播き移植栽培したタマネギ ‘ターザン’ の抽苔株率データを用い，抽苔株率推定モデルについて検討した．タマネギの花芽形成に関する温度反応を積算したVD値，または日々の温度反応と葉数との積を積算したVDLN値について，積算期間を変えて抽苔株率との近似曲線への非線形回帰における決定係数を調査した．VDについては，いずれもの場合も決定係数が低く抽苔株率を高精度に推定することはできなかった．一方，植物体の大きさを加味したVDLNの決定係数については，砺波と上越の全データを用いた場合，1月20日まで，または移植後80日間の積算で0.75以上，砺波のデータのみを用いた場合は2月20日以降または移植後120日以降までの積算で概ね0.95以上と高かった．よって，VDLNを用いるモデルの有効性が示唆された．実用的な指標として，砺波において移植後140日...

Chromosome segment substitution lines (CSSLs) represent a powerful method for precise quantitative trait loci (QTL) detection of complex agronomical traits in plants. In this study, we used a marker-assisted backcrossing strategy to develop a population consisting of 63 CSSLs, derived from backcrossing of the F1 generated from a cross between two Brassica rapa subspecies: "Chiifu" (ssp. pekinen...

Field pennycress (Thiaspi arvense L.) is a species with a cold requirement for the initiation of reproductive development (thermoinduction). Work in this laboratory has been focused on elucidating the biochemical and molecular mechanisms underlying the bolting or rapid stem elongation response that is an intricate part of reproductive development in this species. In the present paper the cellul...

Abstract Gibberellin (GA) plays a major role in controlling Brassica rapa stalk development. As an essential negative regulator of GA signal transduction, DELLA proteins may exert significant effects on However, the regulatory mechanisms underlying this regulation remain unclear. In study, we report highly efficient and inheritable mutagenesis using CRISPR/Cas9 gene editing system BraPDS (phyto...

Pennycress ( Thlaspi arvense L.) is a new winter annual oilseed crop that can be integrated as “cash cover crop” in Midwestern USA cropping systems. Relay-cropping pennycress with soybean [ Glycine max (L.) Merr.] has been shown an effective way to produce three crops over 2 years while providing living on the agricultural landscape nearly year-round. However, management improvements are needed...