DELLA genes restrict inflorescence meristem function independently of plant height.
DELLA genes restrict inflorescence meristem function independently of plant height.
复制标题
DOI:
10.1038/s41477-017-0003-y
复制
发表时间:
2017-09
期刊:
影响因子:
18
通讯作者:
Sablowski R
中科院分区:
文献类型:
--
作者:
Serrano-Mislata A;Bencivenga S;Bush M;Schiessl K;Boden S;Sablowski R
DELLA proteins associate with transcription factors to control plant growth in response to gibberellin. Semi-dwarf DELLA mutants with improved harvest index and decreased lodging greatly improved global food security during the “green revolution” in the 1960-70s. However, DELLA mutants are pleiotropic and the developmental basis for their effects on plant architecture remains poorly understood. Here, we show that DELLA proteins have genetically separable roles in controlling stem growth and the size of the inflorescence meristem, where flowers initiate. Quantitative 3D image analysis, combined with a genome-wide screen for DELLA-bound loci in the inflorescence tip, revealed that DELLAs limit meristem size in Arabidopsis by directly up-regulating the cell cycle inhibitor KRP2 in the underlying rib meristem, without affecting the canonical WUSCHEL-CLAVATA meristem size regulators. Mutation of KRP2 in a DELLA semi-dwarf background restored meristem size, but not stem growth, and accelerated flower production. In barley, secondary mutations in the DELLA gain of function mutant Sln1d also uncoupled meristem and inflorescence size from plant height. Our work reveals an unexpected and conserved role for DELLA genes in controlling shoot meristem function and suggests how dissection of pleiotropic DELLA functions could unlock further yield gains in semi-dwarf mutants.
登录
查看更多内容
DOI:
10.1242/dev.127613
发表时间:
2015-12-01
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Kurihara D;Mizuta Y;Sato Y;Higashiyama T
通讯作者:
Higashiyama T
影响因子:
4.6
作者:
Daviere, Jean-Michel;Achard, Patrick
通讯作者:
Achard, Patrick
影响因子:
9.2
作者:
Achard, Patrick;Gusti, Andi;Genschik, Pascal
通讯作者:
Genschik, Pascal
影响因子:
7.4
作者:
Huang, S;Cerny, RE;Ness, LA
通讯作者:
Ness, LA
DOI:
10.1111/tpj.12603
发表时间:
2014-09
期刊:
The Plant journal : for cell and molecular biology
影响因子:
--
作者:
Gallego-Giraldo C;Hu J;Urbez C;Gomez MD;Sun TP;Perez-Amador MA
通讯作者:
Perez-Amador MA