No need to get snippy. Just looking at the pages of my university botany texts in my mind forty years past the endeavor. 😁 I could find a textual explanation, but I don’t think you are interested?
Discussion
no, the reasons for what i am saying relates to the solubility of CO2 in water at the given temperature, and the demand for CO2
i've seen plants elongate because of heat too, and thinking through it the reasons are obvious and related to why CO2 boosts width of stems and decreases the distance between sidebranches (aka opposite of elongation)