title: An Arabidopsis aspartic protease functions as an anti-cell-death component in reproduction and embryogenesis.
abstract: The components and pathways that regulate and execute developmental cell death programmes in plants remain largely unknown. We have found that the PROMOTION OF CELL SURVIVAL 1 (PCS1) gene in Arabidopsis, which encodes an aspartic protease, has an important role in determining the fate of cells in embryonic development and in reproduction processes. The loss-of-function mutation of PCS1 causes degeneration of both male and female gametophytes and excessive cell death of developing embryos. Conversely, ectopic expression of PCS1 causes the septum and stomium cells that normally die in the anther wall to survive instead, leading to a failure in anther dehiscence and male sterility. PCS1 provides a new avenue for understanding the mechanisms of the programmed cell death processes that are associated with developmental pathways in plants and makes available a useful tool for engineering the male sterility trait for hybrid seed production.
authors.affiliation: Donald Danforth Plant Science Center, 975 N Warson Road, St Louis, Missouri 63132, USA.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Ge
authors.forename: Charles
authors.initials: C
authors.lastname: Dietrich
authors.forename: Michiyo
authors.initials: M
authors.lastname: Matsuno
authors.forename: Guojing
authors.initials: G
authors.lastname: Li
authors.forename: Howard
authors.initials: H
authors.lastname: Berg
authors.forename: Yiji
authors.initials: Y
authors.lastname: Xia
mesh_terms: D017360:Arabidopsis / Q000166:cytology / Q000196:embryology / Q000201:enzymology* / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D016282:Aspartic Acid Endopeptidases / Q000235:genetics / Q000378:metabolism*; D016923:Cell Death; D047108:Embryonic Development; D004721:Endoplasmic Reticulum / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D009154:Mutation / Q000235:genetics; D012098:Reproduction / Q000502:physiology; D013379:Substrate Specificity
chemical_list: D029681:Arabidopsis Proteins; D016282:Aspartic Acid Endopeptidases; C502601:PCS1 proteinase, Arabidopsis
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