PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 23080295-2 2013 Here we studied the expression of PA biosynthetic pathway genes upon exposure to heat shock (HS) in Arabidopsis and showed that the spermine (Spm) synthase gene (SPMS) and S-adenosylmethionine decarboxylase 2 gene are induced at the earliest stage, followed by the induction of the arginine decarboxylase 2 gene. Polyamines 34-36 spermidine synthase 3 Arabidopsis thaliana 162-166