Supplementary information
Figure S1. Phylogenetic tree of WRKY transcription factor
family in poplar.
Figure S2. Analysis of PtrWRKY75 overexpression in
transgenic poplar plants.
Figure S3. Physiological and photosynthesis parameters of
wild-type and transgenic plants under long-term drought conditions.
Table S1. Primer and oligonucleotide sequences used in this
study.
Table S2. Accession numbers for WRKY proteins in various plant
species.
Table S3. WRKY gene family in Populus.