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Titolo:
Reconstruction of reproductive diversity in Hypericum perforatum L. opens novel strategies to manage apomixis
Autore:
Matzk, F; Meister, A; Brutovska, R; Schubert, I;
Indirizzi:
IPK, D-06466 Gatersleben, Germany IPK Gatersleben Germany D-06466IPK, D-06466 Gatersleben, Germany Safarik Univ, Fac Sci, Dept Expt Bot & Genet, SK-04154 Kosice, Slovakia Safarik Univ Kosice Slovakia SK-04154 & Genet, SK-04154 Kosice, Slovakia
Titolo Testata:
PLANT JOURNAL
fascicolo: 3, volume: 26, anno: 2001,
pagine: 275 - 282
SICI:
0960-7412(200105)26:3<275:RORDIH>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
JOHN WORT; PLANTS; PROGENIES; CULTURES;
Keywords:
apomixis; embryo; endosperm; flow cytometric seed screen; Hypericum perforatum; reproductive pathways;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Matzk, F IPK, Corrensstr 3, D-06466 Gatersleben, Germany IPK Corrensstr 3 Gatersleben Germany D-06466 atersleben, Germany
Citazione:
F. Matzk et al., "Reconstruction of reproductive diversity in Hypericum perforatum L. opens novel strategies to manage apomixis", PLANT J, 26(3), 2001, pp. 275-282

Abstract

The mode of reproduction was characterized for 113 accessions of the tetraploid facultative apomictic species Hypericum perforatum using bulked or single mature seeds in the flow cytometric seed screen (FCSS). This screen discriminates several processes of sexual or asexual reproduction based on DNA contents of embryo and endosperm nuclei. Seed formation in H. perforatum proved to be highly polymorphic. Eleven different routes of reproduction were determined. For the first time, individual seeds were identified that originated from two embryo sacs: the endosperm from an aposporous and the embryo from the legitimate meiotic embryo sec. Moreover, diploid plants were discovered, which apparently reproduce by a hitherto unknown route of seed formation, that is chromosome doubling within aposporous initial cells followed by double fertilization. Although most plants were tetraploid and facultative sexual/apomictic, diploid obligate sexuals and tetraploid obligate apomicts could be selected. Additionally, genotypes were detected which at ahigh frequency produced embryos either from reduced parthenogenetic or unreduced fertilized egg cells. The endosperm developed most frequently after fertilization of the central cell in aposporous embryo sacs (pseudogamy) but in few cases also autonomously. The genetic control of apomixis appears to be complex in H. perforatum. Basic material was developed for breeding H.perforatum, and strategies are suggested for elucidation of inheritance aswell as evolution of apomixis and for molecular approaches of apomixis engineering.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 22:02:54