Evidence of ceased programmed cell death in metaphloem sieve elements in the developing caryopsis of Triticum aestivum L.

Transmission electron microscopy (TEM) and fluorescence microscopy studies revealed that the metaphloem sieve elements (MSEs) in the ventral vascular bundle of the caryopses of developing wheat (Triticum aestivum L.) undergo a unique type of programmed cell death (PCD). Terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL)-positive nuclei were observed at 3 and 4 days after flowering (DAF).

[Preliminary observation of acupoint-like and meridian-like structures on the body surface of the zebrafish].

Objective: To probe whether there are acupoint-like and meridian-like structures on the body surface of the zebrafish.

Methods: Adult zebrafish were put into a 10 micromol/L DiA water solution and then anaesthetized for observation under a fluorescent microscope.

Results: The labeled substance appeared in round bright spots and some of them gather together to form a cluster which distributed through the body surface orderly.