R. Rastogi et al., THE MAIZE GLUTAMINE-SYNTHETASE GS(1-2) GENE IS PREFERENTIALLY EXPRESSED IN KERNEL PEDICELS AND IS DEVELOPMENTALLY-REGULATED, Plant and Cell Physiology, 39(4), 1998, pp. 443-446
The pedicel region of Zea mays kernels contains a unique form of maize
glutamine synthetase (GS), GS(p1). RNA blot analysis using GS gene-sp
ecific probes revealed that the expression of the GS(1-2) gene was spe
cific to the pedicel and that it increased in the kernels during devel
opment. This pattern of the maize GS(1-2) gene expression is consisten
t with the tissue specificity of the GS(p1) protein and suggests that
it encodes the GS(p1) isoform of maize GS.