Ontology highlight
ABSTRACT:
PROVIDER: PRJNA938582 | ENA |
REPOSITORIES: ENA
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Project description:Trichomes are the hair-like structures that are widely present on the surface of aerial organs and function in plant defense against biotic and abiotic stresses. Previous studies focus on the single cell trichomes in Arabidopsis and cotton, or multicellular glandular trichomes in tomato, but the developmental process and molecular mechanisms controlling multicellular non-glandular trichome development are largely neglected. Here, we extensively characterized the fruit trichome (spine) development in wild type cucumber and in a tiny branched hair (tbh) mutant that contains a spontaneous mutation and has hairless foliage and smooth fruit surface. Our data indicated that cucumber trichome was multicellular and non-glandular, with no branches or endoreduplication. Further, the major feature of cucumber trichome development was spine base expansion. Transcriptome profiling through Digital Gene Expression indicated that meristem-related genes and transcription factors were implicated in the fruit spine development, and polarity regulators were upregulated during spine base expansion. qRT-PCR verified the reliability of our RNA-SEQ data, and in situ hybridization confirmed the enriched expression of meristem regulators CUP-SHAPED COTYLEDON3 (CUC3) and STM (SHOOT MERISTEMLESS) , as well as the abaxial identity gene KANADI (KAN) in cucumber fruit spine. Together, our results suggest a distinct regulatory pathway involving meristem genes and polarity regulators in multicellular trichome development in cucumber.
2014-07-01 | GSE49607 | GEO
Project description:Trichomes are the hair-like structures that are widely present on the surface of aerial organs and function in plant defense against biotic and abiotic stresses. Previous studies focus on the single cell trichomes in Arabidopsis and cotton, or multicellular glandular trichomes in tomato, but the developmental process and molecular mechanisms controlling multicellular non-glandular trichome development are largely neglected. Here, we extensively characterized the fruit trichome (spine) development in wild type cucumber and in a tiny branched hair (tbh) mutant that contains a spontaneous mutation and has hairless foliage and smooth fruit surface. Our data indicated that cucumber trichome was multicellular and non-glandular, with no branches or endoreduplication. Further, the major feature of cucumber trichome development was spine base expansion. Transcriptome profiling through Digital Gene Expression indicated that meristem-related genes and transcription factors were implicated in the fruit spine development, and polarity regulators were upregulated during spine base expansion. qRT-PCR verified the reliability of our RNA-SEQ data, and in situ hybridization confirmed the enriched expression of meristem regulators CUP-SHAPED COTYLEDON3 (CUC3) and STM (SHOOT MERISTEMLESS) , as well as the abaxial identity gene KANADI (KAN) in cucumber fruit spine. Together, our results suggest a distinct regulatory pathway involving meristem genes and polarity regulators in multicellular trichome development in cucumber. Using Digital Gene Expression technology to compare the genome-wide gene expression profiles in the fruit spines of wild type cucumber and the tbh mutant, as well as the fruit spines on fruits of 0.5cm and 1.6cm long, repectively. Two biological repelicates were generated for each tissue.
2014-07-01 | E-GEOD-49607 | biostudies-arrayexpress
Project description:Trichomes are found on the leaf surface of many plant species. They can be classified into either glandular or non-glandular types. Glandular trichomes are usually multicelluar structures and have long been known to participate in defense against pathogens through the production of specialized chemical products. Non-glandular trichomes, such as those in Arabidopsis thaliana, have been hypothesized to have roles in physical defense against insects, UV protection, detoxification, and heat dispersal. However, it has been difficult to separate a physical role from other possible functions for non-glandular trichomes. We have taken advantage of several mutants in the trichome developmental pathway and gene expression analyses to identify a set of genes expressed predominantly in Arabidopsis trichomes. Keywords: comparing gene expression between wild type and mutants
2008-04-30 | GSE9597 | GEO
Project description:Trichomes are found on the leaf surface of many plant species. They can be classified into either glandular or non-glandular types. Glandular trichomes are usually multicelluar structures and have long been known to participate in defense against pathogens through the production of specialized chemical products. Non-glandular trichomes, such as those in Arabidopsis thaliana, have been hypothesized to have roles in physical defense against insects, UV protection, detoxification, and heat dispersal. However, it has been difficult to separate a physical role from other possible functions for non-glandular trichomes. We have taken advantage of several mutants in the trichome developmental pathway and gene expression analyses to identify a set of genes expressed predominantly in Arabidopsis trichomes. Experiment Overall Design: We compared the gene expression between the wild type and three trichomeless mutants: gl1, ttg1 and gl3egl1 to see which genes' transcripts are enriched in trichomes.
2008-06-16 | E-GEOD-9597 | biostudies-arrayexpress
Project description:Glandular trichomes (GT) are specialized cell factories that have the capacity to produce large amounts of metabolites which can amount to over 10% of the leaf dry weight. The specific expression of secondary metabolite pathways in glandular trichomes has facilitated their elucidation. However, little is known about the connection between central carbon and specialized metabolism in these cells. To address this question, we used the type VI glandular trichomes from a cultivated (Solanum lycopersicum LA4024) and a wild tomato accession (Solanum habrochaites LA1777) as a model. Our study is based on metabolomics, transcriptomics, proteomics and 13C-labeling datasets of trichome and leaves samples. This comparative analysis allowed us to identify specific features of trichomes in comparison to leaves. Tomato type VI trichomes are photosynthetic but acquire their carbon essentially from the leaves in the form of sucrose. Relatively high expression levels of photosystem genes and comparatively low expression of Calvin-cycle and photorespiration genes indicate that photosynthesis is used primarily to produce energy and reducing power to drive the high metabolic activity. High levels of polyunsaturated fatty acids, oxylipins, and of oxidized glutathione and high transcript and protein levels of associated enzymes further indicate a distinct capacity of GT to cope with oxidative stress. Enzymes which are involved in the supply of key precursors for the production of terpenoids both from the cytosol and in the chloroplasts are markedly increased. Finally, some enzymes that are typically associated with C4-photosynthesis are highly expressed in trichomes, suggesting that CO2 recycling processes may increase the efficiency of C usage in these cells. Based on this information we propose a model on how the glandular trichomes achieve high metabolic efficiency.
2017-07-04 | PXD003154 | Pride
Project description:Glandular trichomes (GT) are specialized cell factories that have the capacity to produce large amounts of metabolites which can amount to over 10% of the leaf dry weight. The specific expression of secondary metabolite pathways in glandular trichomes has facilitated their elucidation. However, little is known about the connection between central carbon and specialized metabolism in these cells. To address this question, we used the type VI glandular trichomes from a cultivated (Solanum lycopersicum LA4024) and a wild tomato accession (Solanum habrochaites LA1777) as a model. Our study is based on metabolomics, transcriptomics, proteomics and 13C-labeling datasets of trichome and leaves samples. This comparative analysis allowed us to identify specific features of trichomes in comparison to leaves. Here, the transcript raw and RMA-normalized data is hosted.
2017-05-31 | E-MTAB-4482 | biostudies-arrayexpress
Project description:Glandular trichomes are metabolic cell factories with the capacity to produce large quantities of secondary metabolites. Little is known about the connection between central carbon metabolism and metabolic productivity for secondary metabolites in glandular trichomes. To address this gap in our knowledge, we performed comparative metabolomics, transcriptomics, proteomics and 13C-labeling of type VI glandular trichomes and leaves from a cultivated (Solanum lycopersicum LA4024) and a wild (Solanum habrochaites LA1777) tomato accession. Specific features of glandular trichomes that drive the formation of secondary metabolites could be identified. Tomato type VI trichomes are photosynthetic but acquire their carbon essentially from leaf sucrose. The energy and reducing power from photosynthesis are used to support the biosynthesis of secondary metabolites, while the comparatively reduced Calvin-Benson-Bassham cycle activity may be involved in recycling metabolic CO2. Glandular trichomes cope with oxidative stress by producing high levels of polyunsaturated fatty acids, oxylipins, and glutathione. Finally, distinct mechanisms are present in glandular trichomes to increase the supply of precursors for the isoprenoid pathways. Particularly, the citrate-malate shuttle supplies cytosolic acetyl CoA and plastidic glycolysis and malic enzyme support the formation of plastidic pyruvate. A model is proposed on how glandular trichomes achieve high metabolic productivity.
2017-04-25 | MTBLS297 | MetaboLights
Project description:Genetic analysis of interspecific populations derived from crosses between the wild tomato species Solanum habrochaites f glabratum, which synthesizes and accumulates insecticidal methylketones (MKs) such as 2-undecanone and 2-tridecanone in glandular trichomes, and Solanum lycopersicum (cultivated tomato), which does not, demonstrated that MK metabolism in the wild species can be attributed to several loci. Comparative trascriptome analysis of the glandular trichomes of F2 segregants bulked into low- and high-MK plants identified several genes whose transcripts were either more or less abundant in the high-MK plants.
2009-06-05 | GSE16431 | GEO
Project description:High-level sesquiterpene-production in tomato glandular trichomes
| PRJEB58757 | ENA