Plant physiology

Plant physiology is the part of botany which studies how plants work. That is the physiology of plants. Using a variety of methods, botanists study how plants reproduce, grow, get nutrients, photosynthesise, get water, and so on.
The main topics of plant physiology are photosynthesis, respiration, plant nutrition, plant hormones, tropisms, nastic movements, photoperiodism, photomorphogenesis, circadian rhythms, environmental stress physiology, seed germination, dormancy, stomata function and transpiration.