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Organizing and summarizing search results for youSporophytic apomixis is a type of apomixis where the embryos do not rise from the cells of the gametophyte instead they develop from the nuclear cells. In some species, cells from the nucellus begin to divide, invade the embryo sac, and develop into embryos, resulting in formation of multiple embryos within a single ovule or seed, a phenomenon known as polyembryony.2 Sources - See more
See all on WikipediaApomixis - Wikipedia
In adventitious embryony (sporophytic apomixis), an embryo is formed directly (not from a gametophyte) from nucellus or integument tissue (see nucellar embryony). See more
The gametophytes of bryophytes, and less commonly ferns and lycopods can develop a group of cells that grow to look like a sporophyte of the species but with the ploidy level of the gametophyte, a phenomenon known as apogamy. The sporophytes of … See more
• Apomeiosis: "Without meiosis"; usually meaning the production of a meiotically unreduced gametophyte.
• Parthenogenesis: Development of an embryo directly from … See more• Gvaladze G.E. (1976). Forms of Apomixis in the genus Allium L. In: S.S. Khokhlov (Ed.): Apomixis and Breeding, Amarind Pub., New … See more
Wikipedia text under CC-BY-SA license Apomixis: Current Biology - Cell Press
Apr 24, 2023 · Apomixis can be broadly split into two types — sporophytic and gametophytic apomixis. Sporophytic apomixis is when the embryo directly develops from a sporophytic cell (a somatic cell) — this type occurs naturally …
ZbAGL11 , a class D MADS-box transcription factor of ... - Nature
Feb 1, 2021 · In sporophytic apomixis, embryo sacs form through meiosis and mitosis in the nucellus, and adventitious embryos are formed from integument cells (somatic cells). …
- Author: Xitong Fei, Qianqian Shi, Yichen Qi, Shujie Wang, Yu Lei, Haichao Hu, Yulin Liu, Tuxi Yang, Anzhi We...
- Publish Year: 2021
Apomixis: genetic basis and controlling genes - PMC - PubMed …
In citrus and mango, inheritance of sporophytic apomixis as single dominant locus has been proposed [16, 53], while in some diplosporous apomicts genetic loci controlling the key steps …
The Genetic Control of Apomixis: Asexual Seed Formation
During sporophytic apomixis, development of an embryo sac following the typical angiosperm sexual pathway still occurs. However, during mitosis of the functional megaspore, diploid …
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Controlling Apomixis: Shared Features and Distinct …
Mar 20, 2020 · In sporophytic apomixis, one or more adventitious embryos derive from sporophytic cells of the nucellus, which is surrounding the sexually formed gametophyte …
Apomixis - Introduction and Different Types Of …
Three types of apomixis are generally recognized – diplospory, apospory and adventitious embryony. In diplospory, the embryo sac is derived from the megaspore mother cell either directly by mitotic division or by interrupting …
Apomixis - Features, Types, and Examples
Mar 5, 2024 · Sporophytic apomixis is formed by the direct development of an embryo from the mitotic division of the somatic cell of the ovule. Sporophytic apomixis is a typical phenomenon in citrus plants in which sexual reproduction …
Engineering apomixis in crops - PMC - PubMed Central (PMC)
Meiosis, occurring in both male and female organs, constitutes the transition from the sporophytic to the gametophytic phase. It produces haploid spores that divide mitotically to generate the …
Sporophytic ovule tissues modulate the initiation and progression …
Feb 29, 2012 · Our results show that sporophytic information potentiated by funiculus growth and polar auxin transport influences ovule development, the initiation of apomixis, and the …
The steps from sexual reproduction to apomixis
Apr 8, 2019 · Sporophytic apomixis involves the direct formation of an embryo from a somatic cell in the ovule. In gametophytic apomixis the embryo sac is obtained via apospory and diplospory. In both cases, the unreduced egg cell …
Taxonomy and Biogeography of Apomixis in Angiosperms and …
Sep 3, 2014 · By excluding vegetative propagation per definition, apomixis is development of an embryo from an unreduced and unfertilized egg cell (gametophytic apomixis) or from a somatic …
Regulation of nucellar embryony, a mode of sporophytic apomixis …
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 …
Apomixis – Definition, Types, Functions, Examples
Sep 3, 2024 · Apospory is a process in which the gametophyte develops directly from the sporophyte without the occurrence of meiosis. This means that the diploid sporophytic cells …
Apomixis - Biology Simple
Jan 12, 2025 · Apomixis is a form of asexual reproduction in plants that produces genetically identical offspring. This process bypasses the usual fertilization process. Apomixis plays a …
Apomixis: genetic basis and controlling genes - Oxford Academic
Jul 2, 2022 · For sporophyte apomixis, at the same time as normal amphimixis, the nucellus-derived nucellar embryo initiation cells divide rapidly and enter the embryo sac, forming one or …
Apomixis in Systematics, Evolution and Phylogenetics of …
Sep 13, 2024 · Sporophytic apomixis initiates the development of an embryo out of somatic cell of ovule, either from the nucellus or the integuments. These embryos often form additionally to …
Apomixis in flowering plants: Developmental and evolutionary ...
Jan 1, 2019 · Gametophytic apomixis entails the formation of an unreduced female gametophyte, in which the egg cell is the precursor of the clonal embryo. In contrast, sporophytic apomixis …
seed formation and the apomictic mechanisms of sporophytic and gametophytic apomixis. Meiosis, mitosis, and double fertilization constitute the major components of the seed …
Apomixis - Definition and Examples - Biology Online Dictionary
Sep 30, 2022 · Apomixis is an asexual reproduction that occurs without fertilization but producing embryo (s) and seed (s). One example of apomixis is apomictic parthenogenesis wherein the …
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