Journal Article Populus trichocarpa Chromatin Gaussian density H3K4me3 Histones Plant Proteins PtrAREB1-2 PtrCOMPASS-like complex PtrSDG2-1 Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. biomass production drought tolerance graphical processing unit growth human–machine interaction intelligent robots molecular volume omnidirectional acoustic sensor protein-protein interaction secondary xylem development sound source recognition and tracking surface area model transcription factor triboelectric wood formation