Plant physiology
Plant physiology is a subdiscipline of botany concerned with the functioning , or physiology , of plants . 
<triplet> Plant physiology <subj> botany <obj> part of <subj> physiology <obj> subclass of <triplet> botany <subj> Plant physiology <obj> has part <subj> plant <obj> studies <triplet> plant <subj> botany <obj> studied by