Selective embryo abortion (also known as selective seed abortion and selective ovule abortion ), is a form of non-random, premature termination of embryonic development in plants. Selective embryo abortion assumes that embryo termination depends on the genetic quality of seeds developing within an ovary, and predicts that successfully matured seeds will be of greater fitness than aborted seeds.[1] Consequently, selective embryo abortion has the potential to act as a unique stage of natural selection, influencing the evolution of plant populations and species. This concept was described by botanist John T. Buchholz in 1922 under his framework of developmental selection, which referred to selective embryo abortion as “interovular selection.”[2]
Selective embryo abortion may result from competition among embryos for maternal resources.[1][3] The maternal plant may also play an active role by recognizing and selectively aborting genetically inferior embryos.[1][4]
Evidence of offspring fitness effects support the hypothesis that abortion is a form of selection.[1][4] However, abortion in some species may be due to factors independent of embryo fitness, including the position of embryos within an ovary and late-acting self-incompatibility.
^ abcdKorbecka, G.; Klinkhamer, P. G. L.; Vrieling, K. (2002). "Selective Embryo Abortion Hypothesis Revisited - A Molecular Approach". Plant Biology. 4 (3): 298–310. doi:10.1055/s-2002-32331. ISSN 1438-8677. S2CID 86749709.
^Buchholz, John T. (1922). "Developmental Selection in Vascular Plants". Botanical Gazette. 73 (4): 249–286. doi:10.1086/332991. ISSN 0006-8071. S2CID 84562577.
^Lee, Thomas (1988). "Patterns of fruit and seed production". In Lovett Doust, Jon; Lovett Doust, Lesley (eds.). Plant Reproductive Ecology: Patterns and Strategies. New York: Oxford University Press. pp. 179–202. ISBN 9780195051759.
^ abBaskin, Jerry M.; Baskin, Carol C. (2019). "Effect of selective abortion on seed germination and post-germination performance of offspring". Seed Science Research. 29 (3): 210–214. doi:10.1017/S0960258519000199. ISSN 0960-2585. S2CID 208584118.
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