BIOLOGY TOPIC 9 PLANT BIOLOGY (HL): When is the hormone ABA released in plants? (6)

Question

When is the hormone ABA released in plants? (6)

Sammy Universe · Accepted Answer

when a plant begins to wilt from water stress
the dehydrated mesophyll cells release ABA
= causes K to flow out from guard cells = reduces water P
= loses turgor 
= stomata closes bec the guard cells become flaccid
= blocks opening

BIOLOGY TOPIC 9 PLANT BIOLOGY (HL)

When is the hormone ABA released in plants? (6)

When a plant begins to wilt from water stress the dehydrated mesophyll cells release ABA = causes K to flow out from guard cells = reduces water P = loses turgor = stomata closes bec the guard cells become flaccid = blocks opening

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