Water is rarely a limiting factor for photosynthesis because stomata close during dry spells to conserve water, limiting CO2 diffusion and stopping photosynthesis. For water potential to become low enough to limit photosynthesis, stomata would already be closed.
El agua rara vez es un factor limitante para la fotosíntesis porque los estomas se cierran durante la sequía para conservar agua, lo que limita la difusión del CO2 y detiene la fotosíntesis. Para que el potencial hídrico sea lo suficientemente bajo como para limitar la fotosíntesis, los estomas ya estarían cerrados.
| Front | why water never limiting factor for photo |
|---|---|
| Back | stoma closes during dry spells (limit water loss), limiting CO2 diffusion, and so dec CO2 fixation, meaning light independent photo stops, for water potential to become low enough for water to be limiting factor, stoma already closed and photo stopped. |
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