An ATP-binding cassette subfamily G full transporter is essential for the retention of leaf water in both wild barley and rice

Chen, Guoxiong; Komatsuda, Takao; Feng, Jian; Nawrath, Christiane; Pourkheirandish, Mohammad; Tagiri, Akemi; Hu, Yin Gang; Sameri, Mohammad; Li, Xinrong; Zhao, Xuepeng; Liu, Yubing; Li, Chao; Ma, Xiaoying; Wang, Aidong; Nair, Sudha; Wang, Ning; Miyao, Akio; Sakuma, Shun; Yamaji, Naoki; Zheng, Xiuting; Nevo, Eviatar

doi:10.1073/pnas.1108444108

Cited by 139 publications

(115 citation statements)

References 52 publications

(71 reference statements)

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“…First, the mechanism of intracellular and extracellular transport of wax and cutin precursors remains unknown, although key ABC transporters required for their export across the plasma membrane have been identified (Pighin et al, 2004;Bird et al, 2007;Chen et al, 2011). The first cutin synthase has been identified (Girard et al, 2012;Yeats et al, 2012b), but there are certainly additional cutin synthases, and whether they are closely related to CD1 or belong to distinct protein families remains to be discovered.…”

Section: Discussionmentioning

confidence: 99%

“…More recently, full transporters required for cutin deposition were identified in Arabidopsis (ABCG32; Bessire et al, 2011) as well as wild barley (Hordeum spontaneum) and rice (Oryza sativa; Chen et al, 2011). Despite the clear genetic evidence supporting a role for ABC transporters in cuticular lipid export, the substrate specificity of these transporters has not yet been demonstrated in vitro.…”

Section: Transport Of Cuticle Precursorsmentioning

confidence: 99%

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The Formation and Function of Plant Cuticles

2013

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The plant cuticle is an extracellular hydrophobic layer that covers the aerial epidermis of all land plants, providing protection against desiccation and external environmental stresses. The past decade has seen considerable progress in assembling models for the biosynthesis of its two major components, the polymer cutin and cuticular waxes. Most recently, two breakthroughs in the long-sought molecular bases of alkane formation and polyester synthesis have allowed construction of nearly complete biosynthetic pathways for both waxes and cutin. Concurrently, a complex regulatory network controlling the synthesis of the cuticle is emerging. It has also become clear that the physiological role of the cuticle extends well beyond its primary function as a transpiration barrier, playing important roles in processes ranging from development to interaction with microbes. Here, we review recent progress in the biochemistry and molecular biology of cuticle synthesis and function and highlight some of the major questions that will drive future research in this field.

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Section: Discussionmentioning

confidence: 99%

Section: Transport Of Cuticle Precursorsmentioning

confidence: 99%

The Formation and Function of Plant Cuticles

2013

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“…However, it is possible that Lr34sus-D, Lr34-B, OsABCG50 and the two sorghum orthologs have conserved functions. For example, two recent studies identified three orthologous ABCG transporters from barley, rice and Arabidopsis that are all involved in the formation of cutin layers (Bessire et al 2011;Chen et al 2011).…”

Section: Lr34 Haplotypes In Wheat Rice and Sorghummentioning

confidence: 99%

Recent emergence of the wheat Lr34 multi-pathogen resistance: insights from haplotype analysis in wheat, rice, sorghum and Aegilops tauschii

Krattinger

Jordan

Mace³

et al. 2012

Theor Appl Genet

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Spontaneous sequence changes and the selection of beneficial mutations are driving forces of gene diversification and key factors of evolution. In highly dynamic co-evolutionary processes such as plant-pathogen interactions, the plant's ability to rapidly adapt to newly emerging pathogens is paramount. The hexaploid wheat gene Lr34, which encodes an ATP-binding cassette (ABC) transporter, confers durable field resistance against four fungal diseases. Despite its extensive use in breeding and agriculture, no increase in virulence towards Lr34 has been described over the last century. The wheat genepool contains two predominant Lr34 alleles of which only one confers disease resistance. The two alleles, located on chromosome 7DS, differ by only two exon-polymorphisms. Putatively functional homoeologs and orthologs of Lr34 are found on the B-genome of wheat and in rice and sorghum, but not in maize, barley and Brachypodium. In this study we present a detailed haplotype analysis of homoeologous and orthologous Lr34 genes in genetically and geographically diverse selections of wheat, rice and sorghum accessions. We found that the resistant Lr34 haplotype is unique to the wheat D-genome and is not found in the B-genome of wheat or in rice and sorghum. Furthermore, we only found the susceptible Lr34 allele in a set of 252 Ae. tauschii genotypes, the progenitor of the wheat D-genome. These data provide compelling evidence that the Lr34 multi-pathogen resistance is the result of recent gene diversification occurring after the formation of hexaploid wheat about 8,000 years ago. AbstractSpontaneous sequence changes and the selection of beneficial mutations are driving forces of gene diversification and key factors of evolution. In highly dynamic coevolutionary processes such as plant-pathogen interactions, the plant's ability to rapidly adapt to newly emerging pathogens is paramount. The hexaploid wheat gene Lr34, which encodes an ATP-binding cassette (ABC) transporter, confers durable field resistance against four fungal diseases. Despite its extensive use in breeding and agriculture, no increase in virulence towards Lr34 has been described over the last century. The wheat genepool contains two predominant Lr34 alleles of which only one confers disease resistance. The two alleles, located on chromosome 7DS, differ by only two exon polymorphisms. Putatively functional homoeologs and orthologs of Lr34 are found on the B-genome of wheat and in rice and sorghum, but not in maize, barley and Brachypodium. In this study we present a detailed haplotype analysis of homoeologous and orthologous Lr34 genes in genetically and geographically diverse selections of wheat, rice and sorghum accessions. We found that the resistant Lr34 haplotype is unique to the wheat D-genome and is not found in the B-genome of wheat or in rice and sorghum. Furthermore, we only found the susceptible Lr34 allele in a set of 252 Ae. tauschii genotypes, the progenitor of the wheat D-genome. These data provide compelling evidence that the Lr34 mult...

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“…In addition to the ABCG clade of half transporters, full-size ABCG transporters of the PLEIOTROPIC DRUG RESISTANCE (PDR) family have been implicated in cuticular lipid export following characterization of the pec1 mutant of Arabidopsis and the eibi mutant of barley, which have been designated PEC1/AtABCG32 and Hv-ABCG31, respectively (Bessire et al, 2011;Chen et al, 2011a). Interestingly, the AtABCG32 transporter is highly conserved between monocots and dicots, exhibiting 70% amino acid identity between Arabidopsis and rice.…”

Section: Abcg Transporters Of the Pdr Familymentioning

confidence: 99%

Apoplastic Diffusion Barriers in Arabidopsis

Nawrath

Schreiber

Franke

et al. 2013

The Arabidopsis Book

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129

143

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During the development of Arabidopsis and other land plants, diffusion barriers are formed in the apoplast of specialized tissues within a variety of plant organs. While the cuticle of the epidermis is the primary diffusion barrier in the shoot, the Casparian strips and suberin lamellae of the endodermis and the periderm represent the diffusion barriers in the root. Different classes of molecules contribute to the formation of extracellular diffusion barriers in an organ-and tissue-specific manner. Cutin and wax are the major components of the cuticle, lignin forms the early Casparian strip, and suberin is deposited in the stage II endodermis and the periderm. The current status of our understanding of the relationships between the chemical structure, ultrastructure and physiological functions of plant diffusion barriers is discussed. Specific aspects of the synthesis of diffusion barrier components and protocols that can be used for the assessment of barrier function and important barrier properties are also presented.

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An ATP-binding cassette subfamily G full transporter is essential for the retention of leaf water in both wild barley and rice

Cited by 139 publications

References 52 publications

The Formation and Function of Plant Cuticles

The Formation and Function of Plant Cuticles

Recent emergence of the wheat Lr34 multi-pathogen resistance: insights from haplotype analysis in wheat, rice, sorghum and Aegilops tauschii

Apoplastic Diffusion Barriers in Arabidopsis

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