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GrainGenes Reference Report: PMB-44-283

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Reference	PMB-44-283
Title	Programmed cell death during endosperm development
Journal	Plant Molecular Biology
Year	2000
Volume	44
Pages	283-301
Author	Young TE Gallie DR
Abstract	Summary: The endosperm of cereals functions as a storage tissue in which the majority of starch and seed storage proteins are synthesized. During its development, cereal endosperm initiates a cell death program that eventually affects the entire tissue with the exception of the outermost cells, which differentiate into the aleurone layer and remain living in the mature seed. To date, the cell death program has been described for maize and wheat endosperm, which exhibits common and unique elements for each species. The progression of endosperm programmed cell death (PCD) in both species is accompanied by an increase in nuclease activity and the internucleosomal degradation of nuclear DNA, hallmarks of apoptosis in animals. Moreover, ethylene and abscisic acid are key to mediating PCD in cereal endosperm. The progression of the cell death program in developing maize endosperm follows a highly organized pattern whereas in wheat endosperm, PCD initiates stochastically. Although the essential characteristics of cereal endosperm PCD are now known, the molecular mechanisms responsible for its execution remain to be identified
Keyword	[ Hide all but 1 of 38 ] abscisic acid aleurone aleurone layer animals apoptosis auxin-induced ethylene cell cell death cereal endosperm death defective kernel mutants degradation disease resistance response dna elements endosperm ethylene internucleosomal dna fragmentation its mads box genes maize maize endosperm mechanism molecular mechanism nuclear dna nuclease poly(a) tail function programmed cell death receptor gene family review seed seed storage protein starch storage storage protein tissue translation initiation-factors wheat endosperm

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