Regulation of nucellar embryony, a mode of sporophytic apomixis in Citrus resembling somatic embryogenesis
| Autor: | Xiao-Meng Wu, Anna M. G. Koltunow, Xiuxin Deng, Qiang Xu, Yuantao Xu, Hui-Hui Jia |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ovule Citrus Somatic embryogenesis food and beverages Embryonic Development Embryo Plant Science Nucellar embryony Biology 01 natural sciences Endosperm Double fertilization 03 medical and health sciences Plant Breeding 030104 developmental biology Apomixis Botany Seeds Plant breeding 010606 plant biology & botany |
| Zdroj: | Current opinion in plant biology. 59 |
| ISSN: | 1879-0356 |
| Popis: | Apomixis, is an asexual mode of seed formation resulting in genetically identical or clonal seed with a maternal genotype. Apomixis has not been reported in seed crops where its flexible application in plant breeding could accelerate delivery of new varieties. By contrast, a sporophytic form of apomixis termed nucellar or adventitious embryony is common in the Rutaceae containing Citrus crop species. Here, multiple embryos develop from the maternal, somatic, nucellar cells of the ovule. They are incorporated into the enlarging embryo sac containing the sexually derived zygotic embryo and endosperm, which are products of double fertilization. Recent research has provided insights to the molecular basis for nucellar embryony. Here, we review the current understanding of the initiation, genetic basis and evolution of nucellar embryony in Citrus, and discuss prospects for future study and breeding applications of Citrus sporophytic apomixis. |
| Databáze: | OpenAIRE |
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