Conversion of starch to organic acid is essen | vedclass

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(B) According to the starch-sugar interconversion theory proposed by $Sayre$ $(1926)$,the opening and closing of stomata are regulated by the intercon

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Stomatal opening

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(B) According to the starch-sugar interconversion theory proposed by $Sayre$ $(1926)$,the opening and closing of stomata are regulated by the interconversion of starch and soluble sugars. During the day,the $pH$ of the guard cells increases due to the consumption of $CO_2$ in photosynthesis. This high $pH$ triggers the conversion of starch into organic acids (like malic acid) and glucose$-1-$phosphate. This increases the osmotic concentration of the guard cells,leading to the endosmosis of water,which causes the guard cells to become turgid and the stomata to open. Therefore,the conversion of starch to organic acid is essential for stomatal opening.

Conversion of starch to organic acid is essential for

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