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Self-incompatibility in Papaver Pollen: Programmed Cell Death in an Acidic Environment.
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Self-Incompatibility (SI) is a genetically controlled mechanism that prevents self-fertilisation and thus encourages outbreeding and genetic diversity. During pollination, most SI systems utilise cell-cell recognition to reject incompatible pollen. Mechanistically, one of the best-studied SI systems
Self-incompatibility in Papaver: signalling to trigger PCD in incompatible pollen.
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Sexual reproduction in higher plants uses pollination, involving interactions between pollen and pistil. Self-incompatibility (SI) prevents self-fertilization, providing an important mechanism to promote outbreeding. SI is controlled by the S-locus; discrimination occurs between incompatible pollen,
Temporal and spatial activation of caspase-like enzymes induced by self-incompatibility in Papaver pollen.
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Caspase-like proteases are universal mediators of programmed cell death (PCD). Because plants have no caspase homologs, establishing the nature of their caspase-like activities is of considerable importance to our understanding of PCD in plants. Caspase-3, displaying DEVD specificity, is a key
Proteins implicated in mediating self-incompatibility-induced alterations to the actin cytoskeleton of Papaver pollen.
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OBJECTIVE
Sexual reproduction in angiosperms involves a network of signalling and interactions between pollen and pistil. To promote out-breeding, an additional layer of interactions, involving self-incompatibility (SI), is used to prevent self-fertilization. SI is generally controlled by the
Initiation of programmed cell death in self-incompatibility: role for cytoskeleton modifications and several caspase-like activities.
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Programmed cell death (PCD) is an important and universal process regulating precise death of unwanted cells in eukaryotes. In plants, the existence of PCD has been firmly established for about a decade, and many components shown to be involved in apoptosis/PCD in mammalian systems are found in
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