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(B) The phenomenon where cytokinins delay the senescence (aging) of leaves is known as the $Richmond-Lang$ effect. When an excised leaf is induced to

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Cytokinins

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(B) The phenomenon where cytokinins delay the senescence (aging) of leaves is known as the $Richmond-Lang$ effect. When an excised leaf is induced to form roots,the roots synthesize cytokinins. These cytokinins are transported to the leaf,where they prevent the breakdown of chlorophyll and delay the yellowing process (senescence). Therefore,cytokinins are responsible for retarding leaf aging.

An excised leaf does not turn yellow if it is induced to root. This is attributed to the synthesis of which hormone in the root,or which hormone retards leaf aging?

Similar Questions

Which of the following was isolated and identified by Skoog and Miller?

The chief role of cytokinin is

$A$ : Cytokinin along with the auxin are required for morphogenesis.
$R$ : More cytokinin to auxin ratio promotes root initiation during micropropagation.

Give scientific reasons:
$(1)$ Cytokinin is an evergreen hormone.
$(2)$ Growth is regulated by multiple factors.

Kinetin (a type of cytokinin) increases the rate of mitosis by shortening the duration of:

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