From: Hsf and Hsp gene families in Populus: genome-wide identification, organization and correlated expression during development and in stress responses
A. thaliana
O. sativa
P. trichocarpa
Hsf
21
25
28
sHsp
27
29
37
Hsp60
18
20
Hsp70
26
Hsp90
7
9
10
Hsp100
4
5