TILLERS ABSENT1, the WUSCHEL ortholog, is not involved in stem cell maintenance in the shoot apical meristem in rice
TILLERS ABSENT1, the WUSCHEL ortholog, is not involved in stem cell maintenance in the shoot apical meristem in rice
复制标题
TILLERS ABSENT1 是 WUSCHEL 直向同源物，不参与水稻茎尖分生组织干细胞的维持
DOI：
10.1080/15592324.2019.1640565
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发表时间：
2019
影响因子：
2.9
通讯作者：
and Hiro-Yuki Hirano
中科院分区：
文献类型：
--
作者：
Chie Suzuki;Wakana Tanaka;Hiroyuki Tsuji;and Hiro-Yuki Hirano
茎尖分生组织 (SAM) 中的干细胞维持对于植物发育非常重要，并受拟南芥 (Arabidopsis thaliana) 中的 WUSCHEL-CLAVATA (WUS-CLV) 反馈环调节。WUS 促进干细胞身份，而 CLV 通过抑制 WUS 表达来负向调节干细胞增殖。我们之前表明，在水稻（Oryza sativa）中，WUSorthologTILLERS ABSENT1（TAB1，也称为OsWUS）在SAM维持中没有功能，但它在腋生分生组织发育中起着至关重要的作用。最近，我们发现花器官编号2（FON2）和异常小穗和圆锥花序1（ASP1）的双突变体导致花序分生组织显着增大，并且TAB1功能与该分生组织中的大量干细胞无关。在本文中，我们证实TAB1也与fon2和fon2 asp1突变体营养期SAM的增大无关。此外，FON1启动子下TAB1的错误表达导致野生型中SAM大小略有减小，表明TAB1不是干细胞的正调节因子。综上所述，无论分生组织类型如何，TAB1 似乎都不参与分生组织维持。
Stem cell maintenance in the shoot apical meristem (SAM) is very important for plant development and is regulated by the WUSCHEL–CLAVATA (WUS–CLV) feedback loop in Arabidopsis (Arabidopsis thaliana).WUSpromotes stem cell identity, whereasCLVnegatively regulates stem cell proliferation by repressingWUSexpression. We previously showed that, in rice (Oryza sativa), theWUSorthologTILLERS ABSENT1(TAB1, also known asOsWUS) has no function in SAM maintenance, whereas it plays a crucial role in axillary meristem development. Recently, we showed that a double mutant ofFLORAL ORGAN NUMBER2(FON2) andABERRANT SPIKELET AND PANICLE1(ASP1) led to a marked enlargement of the inflorescence meristem, and that theTAB1function is not associated with massive stem cells in this meristem. In this paper, we confirmed thatTAB1is also unrelated to the enlargement of the SAM in the vegetative phase of thefon2andfon2 asp1mutants. In addition, misexpression ofTAB1under the promoter ofFON1led to a slight reduction of the SAM size in wild type, suggesting thatTAB1is not a positive regulator of stem cells. Taking together,TAB1seems not to be involved in meristem maintenance, irrespective of the meristem type.
影响因子：
4.6
作者：
Suzaki, T;Sato, M;Hirano, HY
通讯作者：
Hirano, HY
影响因子：
56.9
作者：
F. Fornara
通讯作者：
F. Fornara