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Trichome differentiation on leaf primordia of Helianthus annuus (Asteraceae): morphology, gene expression and metabolite profile

Main conclusion Sunflower trichomes fully develop on embryonic plumula within 3 days after start of germination. Toxic sesquiterpene lactones are produced immediately thereafter thus protecting the apical bud of the seedling against herbivory. Helianthus annuus harbors non-glandular and two differen... Full description

Journal Title: Planta 2015, Vol.241 (4), p.837-846
Main Author: Aschenbrenner, Anna-Katharina
Other Authors: Amrehn, Evelyn , Bechtel, Lisa , Spring, Otmar
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Berlin/Heidelberg: Springer-Verlag
ID: ISSN: 0032-0935
Link: https://www.ncbi.nlm.nih.gov/pubmed/25515194
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title: Trichome differentiation on leaf primordia of Helianthus annuus (Asteraceae): morphology, gene expression and metabolite profile
format: Article
creator:
  • Aschenbrenner, Anna-Katharina
  • Amrehn, Evelyn
  • Bechtel, Lisa
  • Spring, Otmar
subjects:
  • Agriculture
  • Analysis
  • Animals
  • Asteraceae
  • Biomedical and Life Sciences
  • Cell Differentiation
  • Ecology
  • Electron microscopy
  • Forestry
  • Gene Expression
  • Genes
  • Genetic research
  • Germination
  • Helianthus
  • Helianthus - genetics
  • Helianthus - growth & development
  • Helianthus - metabolism
  • Helianthus - ultrastructure
  • Helianthus annuus
  • Herbivory
  • Lactones
  • Lactones - metabolism
  • Life Sciences
  • Metabolites
  • Metabolome
  • Metabolomics
  • Microscopy, Electron, Scanning
  • Organ Specificity
  • Original Article
  • Plant Leaves - genetics
  • Plant Leaves - growth & development
  • Plant Leaves - metabolism
  • Plant Leaves - ultrastructure
  • Plant Sciences
  • Seedlings - genetics
  • Seedlings - growth & development
  • Seedlings - metabolism
  • Seedlings - ultrastructure
  • Sesquiterpenes - metabolism
  • Trichomes - genetics
  • Trichomes - growth & development
  • Trichomes - metabolism
  • Trichomes - ultrastructure
ispartof: Planta, 2015, Vol.241 (4), p.837-846
description: Main conclusion Sunflower trichomes fully develop on embryonic plumula within 3 days after start of germination. Toxic sesquiterpene lactones are produced immediately thereafter thus protecting the apical bud of the seedling against herbivory. Helianthus annuus harbors non-glandular and two different types of multicellular glandular trichomes, namely the biseriate capitate glandular trichomes and the uniseriate linear glandular trichomes. The development of capitate glandular trichomes is well known from anther tips on sunflower disk florets, but not from leaves and no information is yet available on the development of the linear glandular trichomes. Scanning electron microscopy of sunflower seedlings unravelled that within the first 40 h of seed germination all three types of trichomes started to emerge on primordia of the first true leaves. Within the following 20-30 h trichomes developed from trichoblasts to fully differentiated hairs. Gene expression studies showed that genes involved in the trichome-based sesquiterpene lactone formation were up-regulated between 72 and 96 h after start of germination. Metabolite profiling with HPLC confirmed the synthesis of sesquiterpene lactones which may contribute to protect the germinating seedlings from herbivory. The study has shown that sunflower leaf primordia can serve as a fast and easy to handle model system for the investigation of trichome development in Asteraceae.
language: eng
source:
identifier: ISSN: 0032-0935
fulltext: no_fulltext
issn:
  • 0032-0935
  • 1432-2048
url: Link


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titleTrichome differentiation on leaf primordia of Helianthus annuus (Asteraceae): morphology, gene expression and metabolite profile
creatorAschenbrenner, Anna-Katharina ; Amrehn, Evelyn ; Bechtel, Lisa ; Spring, Otmar
creatorcontribAschenbrenner, Anna-Katharina ; Amrehn, Evelyn ; Bechtel, Lisa ; Spring, Otmar
descriptionMain conclusion Sunflower trichomes fully develop on embryonic plumula within 3 days after start of germination. Toxic sesquiterpene lactones are produced immediately thereafter thus protecting the apical bud of the seedling against herbivory. Helianthus annuus harbors non-glandular and two different types of multicellular glandular trichomes, namely the biseriate capitate glandular trichomes and the uniseriate linear glandular trichomes. The development of capitate glandular trichomes is well known from anther tips on sunflower disk florets, but not from leaves and no information is yet available on the development of the linear glandular trichomes. Scanning electron microscopy of sunflower seedlings unravelled that within the first 40 h of seed germination all three types of trichomes started to emerge on primordia of the first true leaves. Within the following 20-30 h trichomes developed from trichoblasts to fully differentiated hairs. Gene expression studies showed that genes involved in the trichome-based sesquiterpene lactone formation were up-regulated between 72 and 96 h after start of germination. Metabolite profiling with HPLC confirmed the synthesis of sesquiterpene lactones which may contribute to protect the germinating seedlings from herbivory. The study has shown that sunflower leaf primordia can serve as a fast and easy to handle model system for the investigation of trichome development in Asteraceae.
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subjectAgriculture ; Analysis ; Animals ; Asteraceae ; Biomedical and Life Sciences ; Cell Differentiation ; Ecology ; Electron microscopy ; Forestry ; Gene Expression ; Genes ; Genetic research ; Germination ; Helianthus ; Helianthus - genetics ; Helianthus - growth & development ; Helianthus - metabolism ; Helianthus - ultrastructure ; Helianthus annuus ; Herbivory ; Lactones ; Lactones - metabolism ; Life Sciences ; Metabolites ; Metabolome ; Metabolomics ; Microscopy, Electron, Scanning ; Organ Specificity ; Original Article ; Plant Leaves - genetics ; Plant Leaves - growth & development ; Plant Leaves - metabolism ; Plant Leaves - ultrastructure ; Plant Sciences ; Seedlings - genetics ; Seedlings - growth & development ; Seedlings - metabolism ; Seedlings - ultrastructure ; Sesquiterpenes - metabolism ; Trichomes - genetics ; Trichomes - growth & development ; Trichomes - metabolism ; Trichomes - ultrastructure
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descriptionMain conclusion Sunflower trichomes fully develop on embryonic plumula within 3 days after start of germination. Toxic sesquiterpene lactones are produced immediately thereafter thus protecting the apical bud of the seedling against herbivory. Helianthus annuus harbors non-glandular and two different types of multicellular glandular trichomes, namely the biseriate capitate glandular trichomes and the uniseriate linear glandular trichomes. The development of capitate glandular trichomes is well known from anther tips on sunflower disk florets, but not from leaves and no information is yet available on the development of the linear glandular trichomes. Scanning electron microscopy of sunflower seedlings unravelled that within the first 40 h of seed germination all three types of trichomes started to emerge on primordia of the first true leaves. Within the following 20-30 h trichomes developed from trichoblasts to fully differentiated hairs. Gene expression studies showed that genes involved in the trichome-based sesquiterpene lactone formation were up-regulated between 72 and 96 h after start of germination. Metabolite profiling with HPLC confirmed the synthesis of sesquiterpene lactones which may contribute to protect the germinating seedlings from herbivory. The study has shown that sunflower leaf primordia can serve as a fast and easy to handle model system for the investigation of trichome development in Asteraceae.
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4Biomedical and Life Sciences
5Cell Differentiation
6Ecology
7Electron microscopy
8Forestry
9Gene Expression
10Genes
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12Germination
13Helianthus
14Helianthus - genetics
15Helianthus - growth & development
16Helianthus - metabolism
17Helianthus - ultrastructure
18Helianthus annuus
19Herbivory
20Lactones
21Lactones - metabolism
22Life Sciences
23Metabolites
24Metabolome
25Metabolomics
26Microscopy, Electron, Scanning
27Organ Specificity
28Original Article
29Plant Leaves - genetics
30Plant Leaves - growth & development
31Plant Leaves - metabolism
32Plant Leaves - ultrastructure
33Plant Sciences
34Seedlings - genetics
35Seedlings - growth & development
36Seedlings - metabolism
37Seedlings - ultrastructure
38Sesquiterpenes - metabolism
39Trichomes - genetics
40Trichomes - growth & development
41Trichomes - metabolism
42Trichomes - ultrastructure
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abstractMain conclusion Sunflower trichomes fully develop on embryonic plumula within 3 days after start of germination. Toxic sesquiterpene lactones are produced immediately thereafter thus protecting the apical bud of the seedling against herbivory. Helianthus annuus harbors non-glandular and two different types of multicellular glandular trichomes, namely the biseriate capitate glandular trichomes and the uniseriate linear glandular trichomes. The development of capitate glandular trichomes is well known from anther tips on sunflower disk florets, but not from leaves and no information is yet available on the development of the linear glandular trichomes. Scanning electron microscopy of sunflower seedlings unravelled that within the first 40 h of seed germination all three types of trichomes started to emerge on primordia of the first true leaves. Within the following 20-30 h trichomes developed from trichoblasts to fully differentiated hairs. Gene expression studies showed that genes involved in the trichome-based sesquiterpene lactone formation were up-regulated between 72 and 96 h after start of germination. Metabolite profiling with HPLC confirmed the synthesis of sesquiterpene lactones which may contribute to protect the germinating seedlings from herbivory. The study has shown that sunflower leaf primordia can serve as a fast and easy to handle model system for the investigation of trichome development in Asteraceae.
copBerlin/Heidelberg
pubSpringer-Verlag
pmid25515194
doi10.1007/s00425-014-2223-y