This paper reviewed the recent progress of studies on the plant disease resistance responses and signal molecules.

Many Gram-negative bacteria use N-acylhomoserine lactones (AHLs) as quorum sensing (QS) signal molecules to communicate with each other, synchronize related gene expression and response collectively to a changing environment.

The apoplast is of essential significance in cell communication and identification; the apoplast signal molecules, too, plays an important role in the growth and development of plant cells.

Cloning and expression of gene encoding PH domains of signaling molecules GRF;

This review summarises the signaling molecules that regulating cellular differentiation and cell proportion during Dictyostelium discoideum development, including differentiation- inducing factor (DIF-1, SDF-2), glycogen synthetase kinase (GSK-3), RING-leucine zipper protein (rZIP), etc.

Hydrogen peroxide-signal molecular in plants;

Research and Application of the Method of Ionic Signal to SI Engine;

When AFR closes to stoichiometric value,the maxi- mum values of ionic signal will occur and the time from ignition to peak value will be minimized.

By detecting both ionic signal in the vicinity to ignition poles and relative air-fuel ratio at a constant volume combustion bomb,it was show that the relative air/fuel ratio was influenced by both peak values and time intervals from ignition to both peaks.