Argon-ion beam is an effective mutagen capable of inducing a variety of mutation types. In this study, an argon ion-induced pale green mutant of Arabidopsis thaliana was isolated and characterized. The mutant, designated Ar50-33-pg1, exhibited mod...
FRONTIERS IN PLANT SCIENCE 10 1665-1665 2020年1月 [査読有り]
Recently, a recessive Arabidopsis thaliana mutant with abundant stromules in leaf epidermal pavement cells was visually screened and isolated. The gene responsible for this mutant phenotype was identified as PARC6, a chloroplast division site regu...
Makoto T. Fujiwara   Alvin Sanjaya   Ryuuichi D. Itoh   
FRONTIERS IN PLANT SCIENCE 10 1403-1403 2019年10月 [査読有り]
The existence of numerous chloroplasts in photosynthetic cells is a general feature of plants. Chloroplast biogenesis and inheritance involve two distinct mechanisms: proliferation of chloroplasts by binary fission and partitioning of chloroplasts...
Ryuuichi D. Itoh   Hiroki Ishikawa   Kohdai P. Nakajima   Shota Moriyama   Makoto T. Fujiwara   
PHYSIOLOGIA PLANTARUM 162(4) 479-494 2018年4月 [査読有り]
Stromules, or stroma-filled tubules, are thin extensions of the plastid envelope membrane that are most frequently observed in undifferentiated or non-mesophyll cells. The formation of stromules is developmentally regulated and responsive to bioti...
Makoto T. Fujiwara   Mana Yasuzawa   Kei H. Kojo   Yasuo Niwa   Tomoko Abe   Shigeo Yoshida   Takeshi Nakano   Ryuuichi D. Itoh   
PLOS ONE 13(2) e0192380 2018年2月 [査読有り]
Chloroplasts, or photosynthetic plastids, multiply by binary fission, forming a homogeneous population in plant cells. In Arabidopsis thaliana, the division apparatus (or division ring) of mesophyll chloroplasts includes an inner envelope transmem...
葉緑体分裂には、進化的に保存されたバクテリア様分裂因子群と真核生物特有のダイナミン様タンパク質が関わる。バクテリア様因子のうちMinDとMinEの二種はバクテリアでは細胞分裂の位置決定に関わる。最近、シロイヌナズナMinE相同因子(AtMinE1)が第三の葉緑体分裂因子として機能すること、またシロイヌナズナ葉緑体分裂異常変異体arc11 (accumulation and replication of chloroplasts 11)がMinD相同...