Plant Cell Advance Online Publication
Published on June 13, 2003; 10.1105/tpc.011742
Received March 9, 2003
Accepted May 13, 2003
Sexual and Apomictic Reproduction in Hieracium subgenus Pilosella
Are Closely Interrelated Developmental Pathways
Matthew R. Tucker 1, Ana-Claudia G. Araujo 2, Nicholas A. Paech 1, Valerie Hecht 3, Ed D. L. Schmidt 3, Jan-Bart Rossell 4, Sacco C. de Vries 3, and Anna M. G. Koltunow 4*
1
Department of Plant Science, Waite Campus, Adelaide University, Glen Osmond, South
Australia 5064, Australia; Commonwealth Scientific and Industrial Research Organization
Plant Industry, Horticultural Research Unit, Glen Osmond, South Australia 5064, Australia
2
Embrapa Genetic Resources and Biotechnology (Cenargen), 70770-900 Brasilia, Brazil
3
Laboratory of Biochemistry, Wageningen University, 6703HA Wageningen, The Netherlands.
4
Commonwealth Scientific and Industrial Research Organization Plant Industry, Horticultural
Research Unit, Glen Osmond, South Australia 5064, Australia
* To whom correspondence should be addressed. E-mail: anna.koltunow{at}csiro.au.
Seed formation in flowering plants requires meiosis of the megaspore mother cell
(MMC) inside the ovule, selection of a megaspore that undergoes mitosis to form an
embryo sac, and double fertilization to initiate embryo and endosperm formation.
During apomixis, or asexual seed formation, in Hieracium ovules, a somatic
aposporous initial (AI) cell divides to form a structurally variable aposporous embryo
sac and embryo. This entire process, including endosperm development, is fertilization
independent. Introduction of reproductive tissue marker genes into sexual and apomictic
Hieracium showed that AI cells do not express a MMC marker. Spatial and
temporal gene expression patterns of other introduced genes were conserved commencing
with the first nuclear division of the AI cell in apomicts and the mitotic initiation
of embryo sac formation in sexual plants. Conservation in expression patterns also
occurred during embryo and endosperm development, indicating that sexuality and apomixis
are interrelated pathways that share regulatory components. The induction of a modified
sexual reproduction program in AI cells may enable the manifestation of apomixis
in Hieracium.
This article has been cited by other articles:
|
|
|
|
 
K. E. Nolan, S. Kurdyukov, and R. J. Rose
Expression of the SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE1 (SERK1) gene is associated with developmental change in the life cycle of the model legume Medicago truncatula
J. Exp. Bot.,
April 1, 2009;
60(6):
1759 - 1771.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. Chiappetta, M. Fambrini, M. Petrarulo, F. Rapparini, V. Michelotti, L. Bruno, M. Greco, R. Baraldi, M. Salvini, C. Pugliesi, et al.
Ectopic expression of LEAFY COTYLEDON1-LIKE gene and localized auxin accumulation mark embryogenic competence in epiphyllous plants of Helianthus annuus x H. tuberosus
Ann. Bot.,
March 1, 2009;
103(5):
735 - 747.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. C.M. Rodrigues, M. R. Tucker, S. D. Johnson, M. Hrmova, and A. M.G. Koltunow
Sexual and Apomictic Seed Formation in Hieracium Requires the Plant Polycomb-Group Gene FERTILIZATION INDEPENDENT ENDOSPERM
PLANT CELL,
September 1, 2008;
20(9):
2372 - 2386.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
S. L. Stone, S. A. Braybrook, S. L. Paula, L. W. Kwong, J. Meuser, J. Pelletier, T.-F. Hsieh, R. L. Fischer, R. B. Goldberg, and J. J. Harada
Arabidopsis LEAFY COTYLEDON2 induces maturation traits and auxin activity: Implications for somatic embryogenesis
PNAS,
February 26, 2008;
105(8):
3151 - 3156.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
A. S. Catanach, S. K. Erasmuson, E. Podivinsky, B. R. Jordan, and R. Bicknell
Colloquium Paper: Deletion mapping of genetic regions associated with apomixis in Hieracium
PNAS,
December 5, 2006;
103(49):
18650 - 18655.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
M. Goetz, A. Vivian-Smith, S. D. Johnson, and A. M. Koltunow
AUXIN RESPONSE FACTOR8 Is a Negative Regulator of Fruit Initiation in Arabidopsis
PLANT CELL,
August 1, 2006;
18(8):
1873 - 1886.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
S. Goel, Z. Chen, Y. Akiyama, J. A. Conner, M. Basu, G. Gualtieri, W. W. Hanna, and P. Ozias-Akins
Comparative Physical Mapping of the Apospory-Specific Genomic Region in Two Apomictic Grasses: Pennisetum squamulatum and Cenchrus ciliaris
Genetics,
May 1, 2006;
173(1):
389 - 400.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
E. Albertini, G. Marconi, L. Reale, G. Barcaccia, A. Porceddu, F. Ferranti, and M. Falcinelli
SERK and APOSTART. Candidate Genes for Apomixis in Poa pratensis
Plant Physiology,
August 1, 2005;
138(4):
2185 - 2199.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
F. Matzk, S. Prodanovic, H. Baumlein, and I. Schubert
The Inheritance of Apomixis in Poa pratensis Confirms a Five Locus Model with Differences in Gene Expressivity and Penetrance
PLANT CELL,
January 1, 2005;
17(1):
13 - 24.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. A. Bicknell and A. M. Koltunow
Understanding Apomixis: Recent Advances and Remaining Conundrums
PLANT CELL,
June 1, 2004;
16(suppl_1):
S228 - S245.
[Full Text]
[PDF]
|
|
|
|
|
|
|
D. Grimanelli, M. Garcia, E. Kaszas, E. Perotti, and O. Leblanc
Heterochronic Expression of Sexual Reproductive Programs During Apomictic Development in Tripsacum
Genetics,
November 1, 2003;
165(3):
1521 - 1531.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
N. A. Eckardt
Patterns of Gene Expression in Apomixis
PLANT CELL,
July 1, 2003;
15(7):
1499 - 1501.
[Full Text]
[PDF]
|
|
|
|
|
