Q.

Richmond lang effect is due to

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a

ethylene

b

auxin

c

cytokinins

d

gibberellins

answer is C.

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Detailed Solution

The Richmond Lang effect refers to a phenomenon in plants where aging is slowed down due to the application of plant hormones, specifically cytokinins. This effect was first identified by researchers Richmond and Lang, and has since become an important concept in the study of plant biology and aging.

What is the Richmond Lang Effect?

The Richmond Lang effect is primarily caused by cytokinins, a class of plant hormones that play a crucial role in regulating plant growth, development, and physiology. These hormones are known to delay the process of senescence in plants. Senescence is a term used to describe the natural aging process in plants, where there is a gradual decline in cell function and growth.

How Does the Richmond Lang Effect Work?

Cytokinins work by slowing down the onset of senescence, effectively delaying the aging process in plants. When cytokinins are applied, they help maintain the vitality of plant cells for a longer period, reducing the rate at which chlorophyll breaks down. As a result, the leaves stay greener and fresher for a longer time, which is a key feature of the Richmond Lang effect.

Impact of the Richmond Lang Effect on Plant Growth

One of the most significant outcomes of the Richmond Lang effect is the extended period of photosynthesis in plants. Since chlorophyll degradation is delayed, the plant continues to produce energy more efficiently. This has important implications for agricultural practices, where cytokinins can be used to prolong the lifespan of crops, improving yield and quality.

Summary of the Richmond Lang Effect

In conclusion, the Richmond Lang effect highlights the role of cytokinins in slowing down the natural aging process of plants. By delaying senescence, cytokinins help maintain the functional and aesthetic qualities of plants for a longer time, which can be beneficial in various agricultural and horticultural applications.

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