Open AccessSHORT-ROOT paralogs mediate feedforward regulation of D-type cyclin to promote nodule formation in soybean
Author(s) -
Chunhua Wang,
Meng Li,
Yang Zhao,
Nengsong Liang,
Haiyang Li,
Pengxue Li,
Liling Yang,
Mengyuan Xu,
Xinxin Bian,
Mengxue Wang,
Shasha Wu,
Xufang Niu,
Mengyao Wang,
Xinxin Li,
Yi Sang,
Wu Dong,
Ertao Wang,
Kimberly L. Gallagher,
Shuang Wu
Publication year - 2022
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.2108641119
Subject(s) - biology , cell division , primordium , cyclin , microbiology and biotechnology , gene knockdown , lateral root , cytokinin , root nodule , gene , arabidopsis , botany , cell cycle , cell , mutant , genetics , symbiosis , auxin , bacteria
Significance Nitrogen fixation is economically important in agriculture. Enhancing nodulation in soybean can greatly enhance nitrogen fixation efficiency. Nodule formation in legumes starts with cortical cell divisions in the root. Despite the discovery of the Nod factors and plant hormones that are involved, it remains unclear how cortical cell division is spatiotemporally regulated. Here we provide evidence that soybean has acquired twoSHORT-ROOT (SHR ) paralogs during evolution, which are specifically induced in the early stage of nodule organogenesis. TheseSHR homologs can activate the expression of early nodulin genes and enhance cytokinin signaling and form part of a multilevel regulatory network to activate D-type cyclins during nodulation. Our results provide insight into the mechanisms of nodule organogenesis in soybean.