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| 1 | The miR319-Targeted GhTCP4 Promotes the Transition from Cell Elongation to Wall Thickening in Cotton Fiber显示文摘Plant cell growth involves a complex interplay among cell-wall expansion, biosynthesis, and, in specific tissues, secondary cell wall (SCW) deposition, yet the coordination of these processes remains elusive. Cotton fiber cells are developmentally synchronous, highly elongated, and contain nearly pure cellulose when mature. Here, we report that the transcription factor GhTCP4 plays an important role in balancing cotton fiber cell elongation and wall synthesis. During fiber development the expression of miR319 declines while GhTCP4 transcript levels increase, with high levels of the latter promoting SCW deposition. GhTCP4 interacts with a homeobox-containing factor, GhHOX3, and repressing its transcriptional activity. GhTCP4 and GhHOX3 function antagonistically to regulate cell elongation, thereby establishing temporal control of fiber cell transition to the SCW stage. We found that overexpression of GhTCP4A upregulated and accelerated activation of the SCW biosynthetic pathway in fiber cells, as revealed by transcriptome and promoter activity analyses, resulting in shorter fibers with varied lengths and thicker walls. In contrast, GhTCP4 downregulation led to slightly longer fibers and thinner cell walls. The GhHOX3–GhTCP4 complex may represent a general mechanism of cellular development in plants since both are conserved factors in many species, thus providing us a potential molecular tool for the design of fiber traits. | Jun-Feng Cao Bo Zhao Chao-Chen Huang Zhi-Wen Chen Ting Zhao Hong-Ru Liu Guan-Jing Hu Xiao-Xia Shangguan Chun-Min Shan- Ling-Jian Wang Tian-Zhen Zhang Jonathan F.Wendel Xue-Ying Guan Xiao-Ya Chen | 2020 | Molecular Plant2020，13，7： | 4 |
| 2 | Phylogenetically Distinct Cellulose Synthase Genes Support Secondary Wall Thickening in Arabidopsis Shoot Trichomes and Cotton Fiber显示文摘Through exploring potential analogies between cotton seed trichomes (or cotton fiber) and arabidopsis shoot trichomes we discovered that CesAs from either the primary or secondary wall phylogenetic clades can support secondary wall thickening. CesA genes that typically support primary wall synthesis, AtCesA1,2,3,5, and 6, underpin expansion and secondary wall thickening of arabidopsis shoot trichomes. In contrast, apparent orthologs of CesA genes that support secondary wall synthesis in arabidopsis xylem, AtCesA4,7, and 8, are up-regulated for cotton fiber secondary wall deposition. These conclusions arose from: (a) analyzing the expression of CesA genes in arabidopsis shoot trichomes; (b) observing birefringent secondary walls in arabidopsis shoot trichomes with mutations in AtCesA4, 7, or 8; (c) assaying up-regulated genes during different stages of cotton fiber development; and (d) comparing genes that were co-expressed with primary or secondary wall CesAs in arabidopsis with genes upregulated in arabidopsis trichomes, arabidopsis secondary xylem, or cotton fiber during primary or secondary wall deposition. Cumulatively, the data show that: (a) the xylem of arabidopsis provides the best model for secondary wall cellulose synthesis in cotton fiber; and (b) CesA genes within a 'cell wall toolbox' are used in diverse ways for the construction of particular specialized cell walls. | Lissete Betancur Bir Singh Ryan A.Rapp Jonathan F.Wendel M. David Marks Alison W.Roberts Candace H.Haigler | 2010 | Journal of Integrative Plant Biology2010，52，2： | 4 |
| 3 | Global analysis of gene expression in cotton fibers from wild and domesticated Gossypium barbadense显示文摘 | BhupendraChaudhary RanHovav RyanRapp NeetuVerma Joshua A.Udall Jonathan F.Wendel | 2008 | Evolution & Development2008，，5： | 1 |
| 4 | Genetic and epigenetic consequences of recent hybridization and polyploidy in Spartina (Poaceae)显示文摘 | ARMELSALMON MALIKA L.AINOUCHE JONATHAN F.WENDEL | 2005 | Molecular Ecology2005，，4： | 1 |
| 5 | A Malvaceae mystery: A mallow maelstrom of genome multiplications and maybe misleading methods?显示文摘Previous research suggests that Gossypium has undergone a 5-to 6-fold multiplication following its divergence from Theobroma. However, the number of events, or where they occurred in the Malvaceae phylogeny remains unknown. We analyzed transcriptomic and genomic data from representatives of eight of the nine Malvaceae subfamilies. Phylogenetic analysis of nuclear data placed Dombeya(Dombeyoideae) as sister to the rest of Malvadendrina clade, but the plastid DNA tree strongly supported Durio(Helicteroideae) in this position. Intraspecific Ks plots indicated that all sampled taxa, except Theobroma(Byttnerioideae), Corchorus(Grewioideae), and Dombeya(Dombeyoideae), have experienced whole genome multiplications(WGMs). Quartet analysis suggested WGMs were shared by Malvoideae-Bombacoideae and Sterculioideae-Tilioideae, but did not resolve whether these are shared with each other or Helicteroideae(Durio).Gene tree reconciliation and Bayesian concordance analysis suggested a complex history. Alternative hypotheses are suggested, each involving two independent autotetraploid and one allopolyploid event. They differ in that one entails an allopolyploid origin for the Durio lineage,whereas the other invokes an allopolyploid origin for Malvoideae-Bombacoideae. We highlight the need for more genomic information in the Malvaceae and improved methods to resolve complex evolutionary histories that may include allopolyploidy, incomplete lineage sorting, and variable rates of gene and genome evolution. | Justin L.Conover Nisa Karimi Noah Stenz Cecile Ane Corrinne E.Grover Cynthia Skema Jennifer A.Tate Kirsten Wolff Samuel A.Logan Jonathan F.Wendel David A.Baum | 2019 | Journal of Integrative Plant Biology2019，61，1： | 1 |
| 6 | Genomic mosaicism due to homoeologous exchange generates extensive phenotypic diversity in nascent allopolyploids显示文摘Allopolyploidy is an important process in plant speciation,yet newly formed allopolyploid species typically suffer from extreme genetic bottlenecks.One escape from this impasse might be homoeologous meiotic pairing,during which homoeologous exchanges(HEs)generate phenotypically variable progeny.However,the immediate genome-wide patterns and resulting phenotypic diversity generated by HEs remain largely unknown.Here,we analyzed the genome composition of 202 phenotyped euploid segmental allopolyploid individuals from the fourth selfed generation following chromosomal doubling of reciprocal F1 hybrids of crosses between rice subspecies,using whole-genome sequencing.We describe rampant occurrence of HEs that,by overcoming incompatibility or conferring superiority of hetero-cytonuclear interactions,generate extensive and individualized genomic mosaicism across the analyzed tetraploids.We show that the resulting homoeolog copy number alteration in tetraploids affects known-function genes and their complex genetic interactions,in the process creating extraordinary phenotypic diversity at the population level following a single initial hybridization.Our results illuminate the immediate genomic landscapes possible in a tetraploid genomic environment,and underscore HE as an important mechanism that fuels rapid phenotypic diversification accompanying the initial stages of allopolyploid evolution. | Ying Wu Fan Lin Yao Zhou Jie Wang Shuai Sun Bin Wang Zhibin Zhang Guo Li Xiuyun Lin Xutong Wang Yue Sun Qianli Dong Chunming Xu Lei Gong Jonathan F.Wendel Zhiwu Zhang Bao Liu | 2021 | National Science Review2021，8，5： | 1 |
| 7 | Epigenetics and plant evolution显示文摘 | Ryan A.Rapp Jonathan F.Wendel | 2005 | New Phytologist2005，，1： | 1 |
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