1. Tardigrade
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  3. Biology
  4. When stomata open, the pH of guard cells :

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Q. When stomata open, the pH of guard cells :

Uttarkhand PMTUttarkhand PMT 2004

Solution:

Stomata are the pores present generally in the epidermis of leaf. A stoma contains a pore which is surrounded by two kidney shaped guard cells. During day time $CO _{2}$ is used in the photosynthesis which increase the $pH$ of guard cells. (Day) decrease in $CO _{2}=$ increase in $pH$ of guard cells. (Night) Increase in $CO _{2}$ = decrease in $pH$ of guard cells.