Second part of serial is focussed on ecology of C4 plants. C4 photosynthesis may produce majority of plant biomass in warm and mildly dry regions. This is primary reason for their enormous importance, both for ecosystems and for humankind. Relationship between C4 crop/vegetation and human will be explored in last part of the serial. Now, general ecology and cues advantaging C4 photosynthesis will be described. List of C4 species of Czech Republic flora is shown.
In closing part of C4 serial, I try to explain relationship between C4 plants and human in two dimensions. 1. Importance of C4-based agriculture for current and past civilizations and 2. Scientific aims and approaches to explore C4 photosynthesis, plants and crops. Current
effort to introduce C4 traits into important crops (rice) is also mentioned.