what is the function of chloroplasts present in guard cells ?
Answers
Answer:
guard cell chloroplasts conduct photosynthetic electron transport in a manner similar to that in mesophyll cells and provide the first evidence that photophosphorylation occurs in guard cells in vivo.
Answer:
GCC function
Explanation:
To elucidate the function of guard-cell chloroplasts (GCCs) in stomatal movement, we investigated the consequences of oligomycin, an inhibitor of oxidative phosphorylation, and 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU), an inhibitor of photosystem II, on fusicoccin (FC)-precipitated H+ pumping and stomatal starting. FC turned into discovered to result in H+ pumping in guard-mobileular protoplasts (GCPs) from Viciafaba and stomatal starting withinside the dermis of Commelinabenghalensis;and, pink light (RL) barely inspired those responses. Oligomycin strongly inhibited the pumping and stomatal starting withinside the dark. RL in part reversed the inhibitions, and DCMU reduced the impact of RL. FC activated the plasma membrane H+-ATPase (EC 3.6.1.35) in GCPs further no matter those treatments, indicating that the H+-ATPase interest turned into now no longer the proscribing step in H+ pumping. Oligomycin appreciably reduced the ATP content material in GCPs withinside the dark. RL in part reversed this impact, and DCMU removed the impact of RL. A good sized a part of the ATP produced through photophosphorylation to H+ pumping turned into indicated below RL. These consequences advise that GCCs deliver ATP to the cytosol below RL, and that the ATP is used by the plasma membrane H+-ATPase for H+ pumping.
What are guard cells?
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Definition of guard cell.
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