共查询到20条相似文献,搜索用时 15 毫秒
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Osipova MA Mortier V Demchenko KN Tsyganov VE Tikhonovich IA Lutova LA Dolgikh EA Goormachtig S 《Plant physiology》2012,158(3):1329-1341
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Brice Roux Nathalie Rodde Marie‐Françoise Jardinaud Ton Timmers Laurent Sauviac Ludovic Cottret Sébastien Carrère Erika Sallet Emmanuel Courcelle Sandra Moreau Frédéric Debellé Delphine Capela Fernanda de Carvalho‐Niebel Jérôme Gouzy Claude Bruand Pascal Gamas 《The Plant journal : for cell and molecular biology》2014,77(6):817-837
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Kévin Magne Jeoffrey George Ana Berbel Tornero Blandine Broquet Francisco Madueño Stig U. Andersen Pascal Ratet 《The Plant journal : for cell and molecular biology》2018,94(5):880-894
The NOOT‐BOP‐COCH‐LIKE (NBCL) genes are orthologs of Arabidopsis thaliana BLADE‐ON‐PETIOLE1/2. The NBCLs are developmental regulators essential for plant shaping, mainly through the regulation of organ boundaries, the promotion of lateral organ differentiation and the acquisition of organ identity. In addition to their roles in leaf, stipule and flower development, NBCLs are required for maintaining the identity of indeterminate nitrogen‐fixing nodules with persistent meristems in legumes. In legumes forming determinate nodules, without persistent meristem, the roles of NBCL genes are not known. We thus investigated the role of Lotus japonicus NOOT‐BOP‐COCH‐LIKE1 (LjNBCL1) in determinate nodule identity and studied its functions in aerial organ development using LORE1 insertional mutants and RNA interference‐mediated silencing approaches. In Lotus, LjNBCL1 is involved in leaf patterning and participates in the regulation of axillary outgrowth. Wild‐type Lotus leaves are composed of five leaflets and possess a pair of nectaries at the leaf axil. Legumes such as pea and Medicago have a pair of stipules, rather than nectaries, at the base of their leaves. In Ljnbcl1, nectary development is abolished, demonstrating that nectaries and stipules share a common evolutionary origin. In addition, ectopic roots arising from nodule vascular meristems and reorganization of the nodule vascular bundle vessels were observed on Ljnbcl1 nodules. This demonstrates that NBCL functions are conserved in both indeterminate and determinate nodules through the maintenance of nodule vascular bundle identity. In contrast to its role in floral patterning described in other plants, LjNBCL1 appears essential for the development of both secondary inflorescence meristem and floral meristem. 相似文献
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Molecular Mechanisms in Root Nodule Development 总被引:1,自引:1,他引:0
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Improving rice tolerance to potassium deficiency by enhancing OsHAK16p:WOX11‐controlled root development
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Guang Chen Huimin Feng Qingdi Hu Hongye Qu Aiqun Chen Ling Yu Guohua Xu 《Plant biotechnology journal》2015,13(6):833-848
Potassium (K) deficiency in plants confines root growth and decreases root‐to‐shoot ratio, thus limiting root K acquisition in culture medium. A WUSCHEL‐related homeobox (WOX) gene, WOX11, has been reported as an integrator of auxin and cytokinin signalling that regulates root cell proliferation. Here, we report that ectopic expression of WOX11 gene driven by the promoter of OsHAK16 encoding a low‐K‐enhanced K transporter led to an extensive root system and adventitious roots and more effective tiller numbers in rice. The WOX11‐regulated root and shoot phenotypes in the OsHAK16p:WOX11 transgenic lines were supported by K‐deficiency‐enhanced expression of several RR genes encoding type‐A cytokinin‐responsive regulators, PIN genes encoding auxin transporters and Aux/IAA genes. In comparison with WT, the transgenic lines showed increases in root biomass, root activity and K concentrations in the whole plants, and higher soluble sugar concentrations in roots particularly under low K supply condition. The improvement of sugar partitioning to the roots by the expression of OsHAK16p:WOX11 was further indicated by increasing the expression of OsSUT1 and OsSUT4 genes in leaf blades and several OsMSTs genes in roots. Expression of OsHAK16p:WOX11 in the rice grown in moderate K‐deficient soil increased total K uptake by 72% and grain yield by 24%–32%. The results suggest that enlarging root growth and development by the expression of WOX11 in roots could provide a useful option for increasing K acquisition efficiency and cereal crop productivity in low K soil. 相似文献
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miR396 affects mycorrhization and root meristem activity in the legume Medicago truncatula 总被引:1,自引:0,他引:1
Jérémie Bazin Ghazanfar Abbas Khan Jean‐Philippe Combier Pilar Bustos‐Sanmamed Juan Manuel Debernardi Ramiro Rodriguez Céline Sorin Javier Palatnik Caroline Hartmann Martin Crespi Christine Lelandais‐Brière 《The Plant journal : for cell and molecular biology》2013,74(6):920-934
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Yu Zhao Saifeng Cheng Yaling Song Yulan Huang Shaoli Zhou Xiaoyun Liu Dao-Xiu Zhou 《The Plant cell》2015,27(9):2469-2483
Crown roots are the main components of the fibrous root system in rice (Oryza
sativa). WOX11, a WUSCHEL-related
homeobox gene specifically expressed in the emerging crown root meristem, is a key
regulator in crown root development. However, the nature of WOX11
function in crown root development has remained elusive. Here, we identified a rice
AP2/ERF protein, ERF3, which interacts with WOX11 and was expressed in crown root
initials and during crown root growth. Functional analysis revealed that
ERF3 was essential for crown root development and acts in auxin-
and cytokinin-responsive gene expression. Downregulation of ERF3 in
wox11 mutants produced a more severe root phenotype. Also,
increased expression of ERF3 could partially complement
wox11, indicating that the two genes functioned cooperatively to
regulate crown root development. ERF3 and WOX11
shared a common target, the cytokinin-responsive gene RR2. The
expression of ERF3 and WOX11 only partially
overlapped, underlining a spatio-temporal control of RR2 expression
and crown root development. Furthermore, ERF3-regulated RR2
expression was involved in crown root initiation, while the ERF3/WOX11 interaction
likely repressed RR2 during crown root elongation. These results
define a mechanism regulating gene expression involved in cytokinin signaling during
different stages of crown root development in rice. 相似文献