DBOP specifies palea development by suppressing the expansion of the margin of palea in rice

Zeng, Dongdong; Qin, Ran; Alamin, Md.; Liang, Rong; Yang, Chengcong; Jin, Xiaogang; Shi, Chao

doi:10.1007/s13258-016-0454-y

Cited by 6 publications

(11 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our phylogenetic analysis confirmed that COM1 is restricted to grasses ( Fig. 2C ) 17–19 . The FBHs of COM1 in maize and rice were reported previously as ZmBAD1/WAB1 and OsREP1/DBOP (60.3% and 65.5% sequence similarity to COM1), respectively 17–20 .…”

Section: Resultssupporting

confidence: 74%

“…Instead, COM1 seems to be an out-paralog 21 of SBHs including the sorghum gene SbMSD1 (44.1% sequence similarity to COM1) 22 . Functional characterization of COM1 homologs is only available for maize and rice (Table 1) 17–19 .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, we detected no obvious change in sorghum palea morphology except one additional vascular bundle, similar to maize ( Table 1 ). The rice homolog of COM1 , OsREP1/DBOP , shows a major effect in promoting palea identit y, growth and development, with no effect on branch angle or branch initiation 19, 20 . Loss-of-function mutants display smaller paleae due to less differentiation and severely reduced size of palea cells; a clear contrast to palea defects in barley ( Table 1 ).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

COMPOSITUM 1 (COM1) contributes to the architectural simplification of barley inflorescence via meristem identity signals

Poursarebani

Trautewig

Melzer

et al. 2020

Preprint

View full text Add to dashboard Cite

41Grasses have varying inflorescence shapes; however, little is known about the genetic mechanis ms 42 specifying such shapes among tribes. We identified the grass-specific TCP transcription factor 43 COMPOSITUM 1 (COM1) expressed in inflorescence meristematic boundaries of differe nt 44 grasses. COM1 specifies branch-inhibition in Triticeae (barley) versus branch-formation in non- 45 Triticeae grasses. Analyses of cell size, cell walls and transcripts revealed barley COM1 regulates 46 cell growth, affecting cell wall properties and signaling specifically in meristematic boundaries to 47 establish identity of adjacent meristems. COM1 acts upstream of the boundary gene Liguleless1 48 and confers meristem identity independent of the COM2 pathway. Furthermore, COM1 is subject 49 to purifying natural selection, thereby contributing to specification of the spike inflorescence shape. 50 This meristem identity module has conceptual implications for both inflorescence evolution and 51 molecular breeding in Triticeae. 52 53 54 55 56 57 58 59 60 61 4 Main Text: 62 63The grass family (Poaceae), one of the largest angiosperm families, has evolved a striking diversity 64 of inflorescence morphologies bearing complex structures such as branches and specialized 65 spikelets 1 . These structural features are key for sorting the grass family into tribes 1 . Current grass 66 inflorescences are proposed to originate from a primitive ancestral shape exhibiting "a relative ly 67 small panicle-like branching system made up of primary and secondary paracladia (branches), each 68 one standing single at the nodes" 2 ( Fig. 1A). This ancestral panicle-like inflorescence is also 69 known as a compound spike [3][4][5] . Several independent or combined diversification processes 70 throughout the evolutionary history of the grass family have resulted in the broad diversity of 71 today's grass inflorescences 2,3,6 . Some tribes, e.g. Oryzeae (rice) and Andropogoneae (maize and 72 sorghum), still display ancestral and complex compound shapes, keeping true-lateral long primary 73 and secondary branches. Other grasses, such as Brachypodium distachyon, show lower 74 inflorescence complexity with branch length and number reduced to lateral, small pedicels ending 75 in only one multi-floretted spikelet ( Fig. 1A-C). Inflorescences within the tribe Triticeae, e.g. 76 barley (Hordeum vulgare L.), probably evolved from the ancestral compound spike into the typical 77 unbranched spike (Fig. 1D). The spike displays the least-complex inflorescence shape due to the 78 sessile nature of spikelets and reduction in rachis internodes 2,7 . Architectural variation is often 79 manifested through subtle modifications of transcriptional programs during critical transitio na l 80 windows of inflorescence meristem (IM) maturation 7,8 or functional divergence of key 81 transcriptional regulators and/or other genes 9,10 . Identification of key genetic determinants is 82 crucial for better understanding and explaining both the origin of grass inflores...

show abstract

Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

COMPOSITUM 1 (COM1) contributes to the architectural simplification of barley inflorescence via meristem identity signals

Poursarebani

Trautewig

Melzer

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…OsREP1/DBOP (60.3% and 65.5% sequence similarity to COM1), respectively [14][15][16][17] . Except for maize, none of the COM1 homologs showed a duplication after speciation (e.g., no in-paralogs resulting from within-genome duplication, 25 ).…”

Section: Data 3)mentioning

confidence: 99%

COMPOSITUM 1 contributes to the architectural simplification of barley inflorescence via meristem identity signals

et al. 2020

View full text Add to dashboard Cite

Grasses have varying inflorescence shapes; however, little is known about the genetic mechanisms specifying such shapes among tribes. Here, we identify the grass-specific TCP transcription factor COMPOSITUM 1 (COM1) expressing in inflorescence meristematic boundaries of different grasses. COM1 specifies branch-inhibition in barley (Triticeae) versus branch-formation in non-Triticeae grasses. Analyses of cell size, cell walls and transcripts reveal barley COM1 regulates cell growth, thereby affecting cell wall properties and signaling specifically in meristematic boundaries to establish identity of adjacent meristems. COM1 acts upstream of the boundary gene Liguleless1 and confers meristem identity partially independent of the COM2 pathway. Furthermore, COM1 is subject to purifying natural selection, thereby contributing to specification of the spike inflorescence shape. This meristem identity pathway has conceptual implications for both inflorescence evolution and molecular breeding in Triticeae.

show abstract

“…In the depressed palea 1 (dp1) mutant, the body of the palea is destroyed and finally turned into a leaf-like organ comprising just the margin of the palea (Jin et al 2011;Luo et al 2005). In the dense and erect panicle1 (dep1) and the retarded palea (rep) mutants, the body of the palea is severely degraded, but the margin structure is widened Yuan et al 2009;Zeng et al 2016). The palea defective 1(pd1) mutant shows a smaller and flatter leaflike palea, which causes the lemma to bend excessively inwards (Xiang et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Characterization and fine mapping of nonstop glumes 2 (nsg2) mutant in rice (Oryza sativa L.)

Zeng

Zhang

et al. 2019

Plant Biotechnology

View full text Add to dashboard Cite

In cereal crops, the grain number per panicle and the grain yield are greatly affected by the number of florets in a spikelet. In wild-type rice, a spikelet only produces one fertile floret and beneath the floret are a pair of sterile lemmas and a pair of rudimentary glumes. This study characterized a rice spikelet mutant nonstop glumes 2 (nsg2). In the nsg2 mutant, both the sterile lemmas and rudimentary glumes were elongated, and part of sterile lemma looked like a lemma in appearance, shape and size. Detailed histological analysis and qPCR analysis revealed that the sterile lemmas in the nsg2 mutant had homeotically transformed into lemma-like organs. This phenotype indicates that NSG2 is involved in the regulation of spikelet development and supports the long-held view that sterile lemmas were derived from the lemmas of the two lateral florets. This implies that the rice spikelet has the potential to be restored to the "three florets spikelet", which may have existed in its ancestors. Genetic analysis reveals that the nsg2 trait is controlled by a single recessive gene. The NSG2 gene was finally mapped between markers R-20 and R-39 on chromosome 7 with a physical region of 180 kb. The two MYB family factors LOC_Os07g44030 and LOC_Os07g44090 might be involved in the development of the spikelet and floral organ, and they were considered as candidate genes of NSG2. These results provide a foundation for map-based cloning and function analysis of NSG2, as well as evidence to support "three-florets spikelet" breeding in rice.

show abstract

DBOP specifies palea development by suppressing the expansion of the margin of palea in rice

Cited by 6 publications

References 37 publications

COMPOSITUM 1 (COM1) contributes to the architectural simplification of barley inflorescence via meristem identity signals

COMPOSITUM 1 (COM1) contributes to the architectural simplification of barley inflorescence via meristem identity signals

COMPOSITUM 1 contributes to the architectural simplification of barley inflorescence via meristem identity signals

Characterization and fine mapping of <i>nonstop glumes 2</i> (<i>nsg2</i>) mutant in rice (<i>Oryza sativa</i> L.)

Contact Info

Product

Resources

About