A differential dosage hypothesis for parental effects in seed development.
نویسندگان
چکیده
منابع مشابه
Parent-of-origin effects on seed development in Arabidopsis thaliana require DNA methylation.
Some genes in mammals and flowering plants are subject to parental imprinting, a process by which differential epigenetic marks are imposed on male and female gametes so that one set of alleles is silenced on chromosomes contributed by the mother while another is silenced on paternal chromosomes. Therefore, each genome contributes a different set of active alleles to the offspring, which develo...
متن کاملNuno D . Pires * Seed evolution : parental conflicts in a multi - generational household
Seeds are multi-generational structures containing a small embryonic plant enclosed in layers of diverse parental origins. The evolution of seeds was a pinnacle in an evolutionary trend towards a progressive retention of embryos and gametes within parental tissue. This strategy, which dates back to the first land plants, allowed an increased protection and nourishing of the developing embryo. F...
متن کاملDivergent mating systems and parental conflict as a barrier to hybridization in flowering plants.
Parental conflicts can lead to antagonistic coevolution of the sexes and of parental genomes. Within a population, the resulting antagonistic effects should balance, but crosses between populations can reveal conflict. Parental conflict is less intense in self-pollinating plants than in outcrossers because outcrossing plants are pollinated by multiple pollen donors unrelated to the seed parent,...
متن کاملSeed evolution: parental conflicts in a multi-generational household.
Seeds are multi-generational structures containing a small embryonic plant enclosed in layers of diverse parental origins. The evolution of seeds was a pinnacle in an evolutionary trend towards a progressive retention of embryos and gametes within parental tissue. This strategy, which dates back to the first land plants, allowed an increased protection and nourishing of the developing embryo. F...
متن کاملImprinting of the Polycomb Group Gene MEDEA Serves as a Ploidy Sensor in Arabidopsis
Balanced maternal and paternal genome contributions are a requirement for successful seed development. Unbalanced contributions often cause seed abortion, a phenomenon that has been termed "triploid block." Misregulation of imprinted regulatory genes has been proposed to be the underlying cause for abnormalities in growth and structure of the endosperm in seeds with deviating parental contribut...
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ورودعنوان ژورنال:
- The Plant cell
دوره 16 12 شماره
صفحات -
تاریخ انتشار 2004