---
_id: '12199'
abstract:
- lang: eng
text: The four microsporangia of the flowering plant anther develop from archesporial
cells in the L2 of the primordium. Within each microsporangium, developing microsporocytes
are surrounded by concentric monolayers of tapetal, middle layer and endothecial
cells. How this intricate array of tissues, each containing relatively few cells,
is established in an organ possessing no formal meristems is poorly understood.
We describe here the pivotal role of the LRR receptor kinase EXCESS MICROSPOROCYTES
1 (EMS1) in forming the monolayer of tapetal nurse cells in Arabidopsis. Unusually
for plants, tapetal cells are specified very early in development, and are subsequently
stimulated to proliferate by a receptor-like kinase (RLK) complex that includes
EMS1. Mutations in members of this EMS1 signalling complex and its putative ligand
result in male-sterile plants in which tapetal initials fail to proliferate. Surprisingly,
these cells continue to develop, isolated at the locular periphery. Mutant and
wild-type microsporangia expand at similar rates and the ‘tapetal’ space at the
periphery of mutant locules becomes occupied by microsporocytes. However, induction
of late expression of EMS1 in the few tapetal initials in ems1 plants results
in their proliferation to generate a functional tapetum, and this proliferation
suppresses microsporocyte number. Our experiments also show that integrity of
the tapetal monolayer is crucial for the maintenance of the polarity of divisions
within it. This unexpected autonomy of the tapetal ‘lineage’ is discussed in the
context of tissue development in complex plant organs, where constancy in size,
shape and cell number is crucial.
acknowledgement: 'We thank the following for providing mutant lines and reagents:
Hong Ma, De Ye, Sacco De Vries, and Rod Scott for providing the pA9::Barnase lines
and information on A9 expression patterns. Carla Galinha and Paolo Piazza gave valuable
help with in situ hybridisation and qRT-PCR, respectively, and we acknowledge Qing
Zhang, Helen Prescott and Matthew Dicks for providing excellent technical assistance.
We are indebted to Miltos Tsiantis and Angela Hay for helpful discussion, and the
research was funded by Oxford University through a Clarendon Scholarship to X.F.,
with additional financial support from Magdalen College (Oxford).'
article_processing_charge: No
article_type: original
author:
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
- first_name: Hugh G.
full_name: Dickinson, Hugh G.
last_name: Dickinson
citation:
ama: Feng X, Dickinson HG. Tapetal cell fate, lineage and proliferation in the Arabidopsis
anther. Development. 2010;137(14):2409-2416. doi:10.1242/dev.049320
apa: Feng, X., & Dickinson, H. G. (2010). Tapetal cell fate, lineage and proliferation
in the Arabidopsis anther. Development. The Company of Biologists. https://doi.org/10.1242/dev.049320
chicago: Feng, Xiaoqi, and Hugh G. Dickinson. “Tapetal Cell Fate, Lineage and Proliferation
in the Arabidopsis Anther.” Development. The Company of Biologists, 2010.
https://doi.org/10.1242/dev.049320.
ieee: X. Feng and H. G. Dickinson, “Tapetal cell fate, lineage and proliferation
in the Arabidopsis anther,” Development, vol. 137, no. 14. The Company
of Biologists, pp. 2409–2416, 2010.
ista: Feng X, Dickinson HG. 2010. Tapetal cell fate, lineage and proliferation in
the Arabidopsis anther. Development. 137(14), 2409–2416.
mla: Feng, Xiaoqi, and Hugh G. Dickinson. “Tapetal Cell Fate, Lineage and Proliferation
in the Arabidopsis Anther.” Development, vol. 137, no. 14, The Company
of Biologists, 2010, pp. 2409–16, doi:10.1242/dev.049320.
short: X. Feng, H.G. Dickinson, Development 137 (2010) 2409–2416.
date_created: 2023-01-16T09:21:54Z
date_published: 2010-07-15T00:00:00Z
date_updated: 2023-05-08T10:57:11Z
day: '15'
department:
- _id: XiFe
doi: 10.1242/dev.049320
extern: '1'
external_id:
pmid:
- '20570940'
intvolume: ' 137'
issue: '14'
keyword:
- Developmental Biology
- Molecular Biology
- Anther Tapetum
- Arabidopsis
- Cell Fate Establishment
- EMS1
- Reproductive Cell Lineage
language:
- iso: eng
month: '07'
oa_version: None
page: 2409-2416
pmid: 1
publication: Development
publication_identifier:
issn:
- 1477-9129
- 0950-1991
publication_status: published
publisher: The Company of Biologists
quality_controlled: '1'
scopus_import: '1'
status: public
title: Tapetal cell fate, lineage and proliferation in the Arabidopsis anther
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 137
year: '2010'
...
---
_id: '11103'
abstract:
- lang: eng
text: Over the last decade, the nuclear envelope (NE) has emerged as a key component
in the organization and function of the nuclear genome. As many as 100 different
proteins are thought to specifically localize to this double membrane that separates
the cytoplasm and the nucleoplasm of eukaryotic cells. Selective portals through
the NE are formed at sites where the inner and outer nuclear membranes are fused,
and the coincident assembly of ∼30 proteins into nuclear pore complexes occurs.
These nuclear pore complexes are essential for the control of nucleocytoplasmic
exchange. Many of the NE and nuclear pore proteins are thought to play crucial
roles in gene regulation and thus are increasingly linked to human diseases.
article_processing_charge: No
article_type: review
author:
- first_name: Martin W
full_name: HETZER, Martin W
id: 86c0d31b-b4eb-11ec-ac5a-eae7b2e135ed
last_name: HETZER
orcid: 0000-0002-2111-992X
- first_name: Susan R.
full_name: Wente, Susan R.
last_name: Wente
citation:
ama: 'Hetzer M, Wente SR. Border control at the nucleus: Biogenesis and organization
of the nuclear membrane and pore complexes. Developmental Cell. 2009;17(5):606-616.
doi:10.1016/j.devcel.2009.10.007'
apa: 'Hetzer, M., & Wente, S. R. (2009). Border control at the nucleus: Biogenesis
and organization of the nuclear membrane and pore complexes. Developmental
Cell. Elsevier. https://doi.org/10.1016/j.devcel.2009.10.007'
chicago: 'Hetzer, Martin, and Susan R. Wente. “Border Control at the Nucleus: Biogenesis
and Organization of the Nuclear Membrane and Pore Complexes.” Developmental
Cell. Elsevier, 2009. https://doi.org/10.1016/j.devcel.2009.10.007.'
ieee: 'M. Hetzer and S. R. Wente, “Border control at the nucleus: Biogenesis and
organization of the nuclear membrane and pore complexes,” Developmental Cell,
vol. 17, no. 5. Elsevier, pp. 606–616, 2009.'
ista: 'Hetzer M, Wente SR. 2009. Border control at the nucleus: Biogenesis and organization
of the nuclear membrane and pore complexes. Developmental Cell. 17(5), 606–616.'
mla: 'Hetzer, Martin, and Susan R. Wente. “Border Control at the Nucleus: Biogenesis
and Organization of the Nuclear Membrane and Pore Complexes.” Developmental
Cell, vol. 17, no. 5, Elsevier, 2009, pp. 606–16, doi:10.1016/j.devcel.2009.10.007.'
short: M. Hetzer, S.R. Wente, Developmental Cell 17 (2009) 606–616.
date_created: 2022-04-07T07:53:45Z
date_published: 2009-11-17T00:00:00Z
date_updated: 2022-07-18T08:55:01Z
day: '17'
doi: 10.1016/j.devcel.2009.10.007
extern: '1'
external_id:
pmid:
- '19922866'
intvolume: ' 17'
issue: '5'
keyword:
- Developmental Biology
- Cell Biology
- General Biochemistry
- Genetics and Molecular Biology
- Molecular Biology
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.devcel.2009.10.007
month: '11'
oa: 1
oa_version: Published Version
page: 606-616
pmid: 1
publication: Developmental Cell
publication_identifier:
issn:
- 1534-5807
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Border control at the nucleus: Biogenesis and organization of the nuclear
membrane and pore complexes'
type: journal_article
user_id: 72615eeb-f1f3-11ec-aa25-d4573ddc34fd
volume: 17
year: '2009'
...
---
_id: '11120'
abstract:
- lang: eng
text: The nuclear envelope (NE) is a highly specialized membrane that delineates
the eukaryotic cell nucleus. It is composed of the inner and outer nuclear membranes,
nuclear pore complexes (NPCs) and, in metazoa, the lamina. The NE not only regulates
the trafficking of macromolecules between nucleoplasm and cytosol but also provides
anchoring sites for chromatin and the cytoskeleton. Through these interactions,
the NE helps position the nucleus within the cell and chromosomes within the nucleus,
thereby regulating the expression of certain genes. The NE is not static, rather
it is continuously remodeled during cell division. The most dramatic example of
NE reorganization occurs during mitosis in metazoa when the NE undergoes a complete
cycle of disassembly and reformation. Despite the importance of the NE for eukaryotic
cell life, relatively little is known about its biogenesis or many of its functions.
We thus are far from understanding the molecular etiology of a diverse group of
NE-associated diseases.
article_processing_charge: No
article_type: original
author:
- first_name: Martin W
full_name: HETZER, Martin W
id: 86c0d31b-b4eb-11ec-ac5a-eae7b2e135ed
last_name: HETZER
orcid: 0000-0002-2111-992X
- first_name: Tobias C.
full_name: Walther, Tobias C.
last_name: Walther
- first_name: Iain W.
full_name: Mattaj, Iain W.
last_name: Mattaj
citation:
ama: 'Hetzer M, Walther TC, Mattaj IW. Pushing the envelope: Structure, function,
and dynamics of the nuclear periphery. Annual Review of Cell and Developmental
Biology. 2005;21:347-380. doi:10.1146/annurev.cellbio.21.090704.151152'
apa: 'Hetzer, M., Walther, T. C., & Mattaj, I. W. (2005). Pushing the envelope:
Structure, function, and dynamics of the nuclear periphery. Annual Review of
Cell and Developmental Biology. Annual Reviews. https://doi.org/10.1146/annurev.cellbio.21.090704.151152'
chicago: 'Hetzer, Martin, Tobias C. Walther, and Iain W. Mattaj. “Pushing the Envelope:
Structure, Function, and Dynamics of the Nuclear Periphery.” Annual Review
of Cell and Developmental Biology. Annual Reviews, 2005. https://doi.org/10.1146/annurev.cellbio.21.090704.151152.'
ieee: 'M. Hetzer, T. C. Walther, and I. W. Mattaj, “Pushing the envelope: Structure,
function, and dynamics of the nuclear periphery,” Annual Review of Cell and
Developmental Biology, vol. 21. Annual Reviews, pp. 347–380, 2005.'
ista: 'Hetzer M, Walther TC, Mattaj IW. 2005. Pushing the envelope: Structure, function,
and dynamics of the nuclear periphery. Annual Review of Cell and Developmental
Biology. 21, 347–380.'
mla: 'Hetzer, Martin, et al. “Pushing the Envelope: Structure, Function, and Dynamics
of the Nuclear Periphery.” Annual Review of Cell and Developmental Biology,
vol. 21, Annual Reviews, 2005, pp. 347–80, doi:10.1146/annurev.cellbio.21.090704.151152.'
short: M. Hetzer, T.C. Walther, I.W. Mattaj, Annual Review of Cell and Developmental
Biology 21 (2005) 347–380.
date_created: 2022-04-07T07:56:52Z
date_published: 2005-11-10T00:00:00Z
date_updated: 2022-07-18T08:57:34Z
day: '10'
doi: 10.1146/annurev.cellbio.21.090704.151152
extern: '1'
external_id:
pmid:
- '16212499'
intvolume: ' 21'
keyword:
- Cell Biology
- Developmental Biology
language:
- iso: eng
month: '11'
oa_version: None
page: 347-380
pmid: 1
publication: Annual Review of Cell and Developmental Biology
publication_identifier:
eissn:
- 1530-8995
issn:
- 1081-0706
publication_status: published
publisher: Annual Reviews
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Pushing the envelope: Structure, function, and dynamics of the nuclear periphery'
type: journal_article
user_id: 72615eeb-f1f3-11ec-aa25-d4573ddc34fd
volume: 21
year: '2005'
...