Anatomical constraints to nonstomatal diffusion conductance and photosynthesis in lycophytes and bryophytes

Summary Photosynthesis in bryophytes and lycophytes has received less attention than terrestrial plant groups. In particular, few studies have addressed the nonstomatal diffusion conductance to CO 2 g nsd of these plant groups. Their lower photosynthetic rate per leaf mass area at any given nitrogen concentration compared with vascular plants suggested a stronger limitation by CO 2 diffusion. We hypothesized that bryophyte and lycophyte...