Patatin-related phospholipase A, pPLAIIIα, modulates the longitudinal growth of vegetative tissues and seeds in rice

Liu, Guangmeng; Zhang, Ke; Ai, Jun; Deng, Xianjun; Hong, Yueyun; Wang, Xuemin

doi:10.1093/jxb/erv402

Cited by 45 publications

(40 citation statements)

References 31 publications

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“…However, close to another homolog from ginseng, PgpPLAIIIβ, rather displayed reduced content of lignin by phloroglucinol staining and direct lignin quantification analysis by overexpressing in Arabidopsis and poplar [8,9]. In this study, endogenous AtpPLAIIIα-OE also displayed a reduced amount of lignin instead of cellulose content alteration (Figure 2), which is antagonistic to that found in rice focused on cell wall composition [7]. The reduction of lignin content was further confirmed in the perennial model plant poplar ( Figure 5).…”

Section: Discussioncontrasting

confidence: 54%

“…Native AtpPLAIIIβ and AtpPLAIIIδ from Arabidopsis [5,6] and OspPLAIIIα from rice [7] are all shown to have a reduced amount of cellulose without knowing the exact mechanism when overexpressed in endogenous plant systems. However, close to another homolog from ginseng, PgpPLAIIIβ, rather displayed reduced content of lignin by phloroglucinol staining and direct lignin quantification analysis by overexpressing in Arabidopsis and poplar [8,9].…”

Section: Discussionmentioning

confidence: 99%

“…AtpPLAI and AtpPLAIIs have been reported to be involved in the plant response to biotic stresses, auxin signaling, and phosphate deficiency. pPLAIII overexpression (OE) showed a similar stunted and dwarf mutant phenotype, and resulted in an altered cell wall content of cellulose [5][6][7] or lignin [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…The altered lipid species were reported to result in the reduction of cellulose content [5,6]. However, another close homolog AtpPLAIIIα was only functionally characterized in rice and showed a similar phenotype to AtpPLAIIIβ-OE and AtpPLAIIIδ-OE, but the contents of many lipid species were lower than that of wild-type (WT) species with decreased cellulose content [7]. To clarify these conflicting lipidomics results, we have recently characterized another pPLAIII homolog from ginseng especially focused on cell wall…”

Section: Introductionmentioning

confidence: 99%

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Patatin-Related Phospholipase AtpPLAIIIα Affects Lignification of Xylem in Arabidopsis and Hybrid Poplars

Jang

Lee

2020

Plants

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Lipid acyl hydrolase are a diverse group of enzymes that hydrolyze the ester or amide bonds of fatty acid in plant lipids. Patatin-related phospholipase AIIIs (pPLAIIIs) are one of major lipid acyl hydrolases that are less closely related to potato tuber patatins and are plant-specific. Recently, overexpression of ginseng-derived PgpPLAIIIβwas reported to be involved in the reduced level of lignin content in Arabidopsis and the mature xylem layer of poplar. The presence of lignin-polysaccharides renders cell walls recalcitrant for pulping and biofuel production. The tissue-specific regulation of lignin biosynthesis, without altering all xylem in plants, can be utilized usefully by keeping mechanical strength and resistance to various environmental stimuli. To identify another pPLAIII homolog from Arabidopsis, constitutively overexpressed AtpPLAIIIα was characterized for xylem lignification in two well-studied model plants, Arabidopsis and poplar. The characterization of gene function in annual and perennial plants with respect to lignin biosynthesis revealed the functional redundancy of less lignification via downregulation of lignin biosynthesis-related genes.

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Section: Discussioncontrasting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Patatin-Related Phospholipase AtpPLAIIIα Affects Lignification of Xylem in Arabidopsis and Hybrid Poplars

Jang

Lee

2020

Plants

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“…The increased level of another siRNA cluster in the gene body coincided with the decreased expression level of the A homoeolog in AADD (Figure c). TRIUR3_16341 is a rice homolog of OspPLAII η, whose over‐expression suppresses cell elongation (Liu et al ., ). The data suggest a possible role for siRNAs in regulating gene expression during wheat polyploidization.…”

Section: Resultsmentioning

confidence: 97%

Asymmetrical changes of gene expression, small RNAs and chromatin in two resynthesized wheat allotetraploids

Yuan

Jiang

et al. 2018

The Plant Journal

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Polyploidy occurs in some animals and all flowering plants, including important crops such as wheat. The consequences of polyploidy in crops remain elusive, partly because their progenitors are unknown. Using two resynthesized wheat allotetraploids S S AA and AADD with known diploid progenitors, we analyzed mRNA and small RNA transcriptomes in the endosperm, compared transcriptomes between endosperm and root in AADD, and examined chromatin changes in the allotetraploids. In the endosperm, there were more non-additively expressed genes in S S AA than in AADD. In AADD, non-additively expressed genes were developmentally regulated, and the majority (62-70%) were repressed. The repressed genes in AADD included a group of histone methyltransferase gene homologs, which correlated with reduced histone H3K9me2 levels and activation of various transposable elements in AADD. In S S AA, there was a tendency for expression dominance of S over A homoeologs, but the histone methyltransferase gene homologs were additively expressed, correlating with insignificant changes in histone H3K9me2 levels. Moreover, more 24-nucleotide small inferring RNAs (siRNAs) in the A subgenome were disrupted in AADD than in S S AA, which were associated with expression changes of siRNA-associated genes. Our results indicate that asymmetrical changes in siRNAs, chromatin modifications, transposons and gene expression coincide with unstable AADD genomes and stable S S AA genomes, which could help explain the evolutionary trajectories of wheat allotetraploids formed by different progenitors.

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Yield component QTLs identified by genome‐wide association mapping validated in a diverse tropical japonica × tropical japonica rice biparental mapping population

Eizenga

Rice²,

Huggins

et al. 2023

Crop Science

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The Rice Diversity Panel 1 (RDP1) is a resource for genome‐wide association (GWA) studies to explore the five major rice (Oryza sativa L.) subpopulations indica, aus, aromatic, temperate japonica, and tropical japonica (TRJ). Previously collected phenotype data for yield‐related traits in RDP1 were reanalyzed using a recently released 4.8 million single nucleotide polymorphism (SNP) dataset to enhance GWA mapping precision. GWA mapping revealed numerous GWA quantitative trait loci (QTLs) that were specific to one or more subpopulations. Most southern US cultivars are classified tropical japonica (TRJ) or TRJ admixtures, thus TRJ was the focus for validating Rice Diversity Panel 1 GWA QTLs. Two diverse TRJ accessions, L‐202 originating from California, USA, and Trembese from Indonesia, were selected for developing a recombinant inbred line (RIL) population. This RIL population was phenotyped for 20 yield component traits, 16 of which were measured in RDP1, including six agronomic, six panicle architecture, and four seed traits. Genotyping with 1439 polymorphic markers and QTL mapping revealed 43 RIL QTLs. Examination of the GWA QTLs identified 163 GWA QTLs for the same or related traits co‐located with 37 RIL QTLs. A significant overlap was on chromosome 7 (21.8–25.4; 26.8–29.6 Mb) where the well‐known yield related genes, GRAIN WEIGHT7 (GW7) and FRIZZY PANICLE (FZP), respectively, are located and specific to TRJ. In this region, 10 RIL QTLs were co‐located with 36 GWA QTLs for panicle architecture or seed traits, especially secondary branching to increase the number of seeds. RIL QTLs co‐located with GWA QTLs are targets for developing SNP markers that can be utilized in cultivar development.

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Patatin-related phospholipase A, pPLAIIIα, modulates the longitudinal growth of vegetative tissues and seeds in rice

Abstract: HighlightThe phospholipase pPLAIIIα plays an important role in rice vegetative and reproductive growth, and constitutive, high expression of OspPLAIIIα suppresses cellulose production and cell elongation.

Cited by 45 publications

References 31 publications

Patatin-Related Phospholipase AtpPLAIIIα Affects Lignification of Xylem in Arabidopsis and Hybrid Poplars

Patatin-Related Phospholipase AtpPLAIIIα Affects Lignification of Xylem in Arabidopsis and Hybrid Poplars

Asymmetrical changes of gene expression, small RNAs and chromatin in two resynthesized wheat allotetraploids

Yield component QTLs identified by genome‐wide association mapping validated in a diverse tropical japonica × tropical japonica rice biparental mapping population

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