27YLU75U4W Journal Article Phosphorus gene expression phosphorus limitation Abiotic and biotic stress Arabidopsis Proteins Comparative Study Comparative transcriptomics PHR1 PHR1 protein, Arabidopsis Phosphates RNA sequencing RNA-seq Research Support, Non-U.S. Gov't Transcription Factors alternative splicing disease resistance drought resistance model plant species non-coding RNAs small signaling peptides translational research unannotated genes