Diffusion Limitation and CO2 Concentrating Mechanisms in Bryophytes

摘要: This chapter explores how the diffusion of CO2 into photosynthetic tissues is affected by morphology and biochemistry bryophytes from sub-cellular level to that leaf-like structures, with an emphasis on most ancient form a land plant concentrating mechanism, hornwort pyrenoid. Interest in control has increased dramatically over past 5–10 years due discovery transporting aquaporins chloroplast membranes ever-increasing interest carbon fixation as source food biologically generated fuels. The critical importance our understanding photosynthesis plants because it inextricably linked water loss. Photosynthetic need be well hydrated function properly, but must lose order capture since vapor can diffuse out through any pore large enough allow in. At same time, too much also limits even thin films liquid present significant barriers diffusion. Furthermore, partial pressure reaching sites carboxylation what inherently controls efficiency assimilation. amazing variation bryophyte provides broad palette for sampling have balanced these structural biochemical trade-offs. Here we discuss studying this variability generate invaluable insight both limitations opportunities enhancing photosynthesis.