...Thomas E. Hughes; Jane A. Langdale ABSTRACT The flexible deployment of developmental regulators is an increasingly appreciated aspect of plant development and evolution. The GRAS transcription factor SCARECROW (SCR) regulates the development of the endodermis in Arabidopsis and maize roots...

...Vibhav Gautam; Archita Singh; Sandeep Yadav; Sharmila Singh; Pramod Kumar; Shabari Sarkar Das; Ananda K. Sarkar ABSTRACT Root system architecture and anatomy of monocotyledonous maize is significantly different from dicotyledonous model Arabidopsis . The molecular role of non-coding RNA (ncRNA...

...Phillip A. Conklin; Robyn Johnston; Brianne R. Conlon; Rena Shimizu; Michael J. Scanlon ABSTRACT The mechanisms whereby leaf anlagen undergo proliferative growth and expansion to form wide, flat leaves are unclear. The maize gene NARROWSHEATH1 ( NS1 ) is a WUSCHEL-related homeobox3 ( WOX3 ) homolog...

...) and mesophyll (outer) cells. Here, we demonstrate that, in the C 4 monocot maize, Kranz patterning is regulated by redundant function of SCARECROW 1 (ZmSCR1) and a previously uncharacterized homeologue: ZmSCR1h. ZmSCR1 and ZmSCR1h transcripts accumulate in ground meristem cells of developing leaf primordia...

...Josh Strable; Erik Vollbrecht ABSTRACT Floral morphology is shaped by factors that modulate floral meristem activity and size, and the identity, number and arrangement of the lateral organs they form. We report here that the maize CRABS CLAW co-orthologs drooping leaf1 ( drl1 ) and drl2...

... , but appears to be conserved in diverse higher plant species. In this Review, we highlight the commonalities and differences between CLAVATA-WUSCHEL pathways in different species, with an emphasis on Arabidopsis , maize, rice and tomato. We focus on stem cell control in shoot meristems, but also briefly...

...Michael W. Lewis; Nathalie Bolduc; Kayley Hake; Yadanar Htike; Angela Hay; Héctor Candela; Sarah Hake Maize leaves have distinct tissues that serve specific purposes. The blade tilts back to photosynthesize and the sheath wraps around the stem to provide structural support and protect young leaves...

... with the predictions of our models, auxin responses were not detectable within the FG of Arabidopsis or maize, suggesting that the effects of manipulating auxin production and response on cell fate determination might be indirect. References Alon U. ( 2007 ). An Introduction to Systems Biology: Design...

...Jihyun Moon; Héctor Candela; Sarah Hake How cells acquire competence to differentiate according to position is an essential question in developmental biology. Maize leaves provide a unique opportunity to study positional information. In the developing leaf primordium, a line is drawn across a field...

... in flowers. Loss-of-function of the maize multiple archesporial cells 1 ( mac1 ) gene increases the meiotically competent population and ablates specification of somatic wall layers in anthers. We report the cloning of mac1 , which is the ortholog of rice TDL1A . Contrary to prior studies in rice...

... of the phytomer by repressing cell growth and differentiation in a specific domain, thus allowing compensatory growth in other parts. Since at least three closely related tsh4 -like genes are present in the maize genome ( Fig. 3C ; see Fig. S1A in the supplementary material ), it is likely that they also have...

...). After de-husking,surface sterilization and imbibition, rice seeds were germinated on Murashige and Skoog (MS) media in magenta boxes for 12 days before transfer to soil and growth at 22°C with a 16 hours light/8 hours dark photoperiod. Maize plants were Zea mays GNN5 (V. Walbot, Stanford University...

...George Chuck; Robert Meeley; Sarah Hake Grass flowers are organized on small branches known as spikelets. In maize,the spikelet meristem is determinate, producing one floral meristem and then converting into a second floral meristem. The APETALA2 ( AP2 )-like gene indeterminate spikelet1 ( ids1...

... stem cell renewal and organ initiation. In fasciated mutants, organ initiation fails to keep pace with meristem proliferation. The thick tassel dwarf1 ( td1 )mutation of maize affects both male and female inflorescence development. The female inflorescence, which results in the ear, is fasciated...

... of B- and C-class genes in the grass species rice and maize suggests that the C- and B-class functions are conserved between monocots and eudicots, with B-class genes controlling stamen and lodicule development. We have undertaken a further analysis of the maize B-class genes Silky1 , the putative AP3...

...Michelle T. Juarez; Richard W. Twigg; Marja C. P. Timmermans Dorsoventral (adaxial/abaxial) polarity of the maize leaf is established in the meristem and is maintained throughout organ development to coordinate proper outgrowth and patterning of the leaf. rolled leaf1 ( rld1 ) and leafbladeless1...

...Toshi Foster; Angela Hay; Robyn Johnston; Sarah Hake The maize leaf consists of four distinct tissues along its proximodistal axis: sheath, ligule, auricle and blade. liguleless1 ( lg1 )functions cell autonomously to specify ligule and auricle, and may propagate a signal that correctly positions...

...Judith Nardmann; Jiabing Ji; Wolfgang Werr; Michael J. Scanlon The narrow sheath (ns) phenotype of maize is a duplicate factor trait conferred by mutations at the unlinked loci ns1 and ns2 . Recessive mutations at each locus together confer the phenotypic deletion of a lateral compartment in maize...

...Liliana M. Costa; Jose F. Gutierrez-Marcos; Thomas P. Brutnell; Andrew J. Greenland; Hugh G. Dickinson Cereal endosperm tissues account for most of the world's calorific intake,yet the regulation of monocot seed development remains poorly understood. The maize endosperm originates with a series...

... homologs in flower development have been demonstrated in numerous dicots,little is known about the function of these meristem identity genes in the more distantly related flowering plants, the monocots. We used reverse genetics to investigate the role of two duplicate FLORICAULA/LEAFY homologs in maize...