Alternative splicing(AS) in eukaryotic organisms is closely related to the gene regulation in plant abiotic stress responses, in which serine/arginine-rich proteins(SR proteins) act as key regulators. The genome sequence of maize inbred line B73 was analyzed, showing that the promoter regions of SR genes possess about three to eight kinds of cis-acting regulatory elements. Twenty-seven SR genes encode alkaline proteins, and 23 of which are divided into five subgroups in terms of the first RNA recognition mo...