Morphological survey and characterization of programmed cell death in the placenta-chalaza and endosperm in the developing caryopsis of maize [electronic resource] /
ABSTRACT: Programmed cell death (PCD) was examined on a morphological basis employing both light and electron microscopy techniques. The tissues examined were the placenta-chalaza (PC) region and maturing endosperm of the maize caryopsis. The PC region is sporophytic and, in maize, composed of two distinct types of cells, which undergo two distinct morphological changes as they die. This cell death process is fertilization dependent and takes place between 6 and 12 days after pollination (DAP). The first type of cells in the PC is derived from the nucellus and undergoes a rapid cell death leaving behind cell corpses and the number of detectable plasmodesmata decreases. There is no detectable DNA cleavage via terminal deoxynucleotidy transferase dUTP nick end label (TUNEL) assay in this zone at any time.
School:University of Florida
School Location:USA - Florida
Source Type:Master's Thesis
Keywords:caryopsis development maize morphology pcd
Date of Publication: