Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

Question

Which one of the following growth regulators is known as ‘stress hormone’?

Answer 1

The concern in the question is the pre-mature yellowing of leaves, which might lead to decreased seed yield. To understand which treatment could be most beneficial, let's analyze the options provided:

Frequent irrigation of the crop: While regular irrigation is essential for crop health, excessive irrigation won't necessarily address the issue of yellowing leaves, unless the yellowing is due to drought stress.
Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer: Cytokinins can promote cell division and delay aging, but their primary role is not directly related to chlorophyll synthesis.
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxyacetic acid: This approach may not solve the fundamental problem, as it doesn't address the cause of yellowing.
Application of iron and magnesium to promote synthesis of chlorophyll: This is the correct answer. Iron and magnesium are crucial micronutrients in the synthesis of chlorophyll, the green pigment in plants. Deficiency of these elements leads to chlorosis or yellowing of leaves. Providing these nutrients helps in the maintenance and synthesis of chlorophyll, which can lead to healthier plants and potentially higher yields.

The pre-mature yellowing of leaves is often due to nutrient deficiencies, particularly chlorophyll-related nutrients like iron and magnesium. Application of these will promote the synthesis of chlorophyll, thus preventing yellowing and potentially enhancing seed yield.

Answer 2

The concern in the question is the pre-mature yellowing of leaves, which might lead to decreased seed yield. To understand which treatment could be most beneficial, let's analyze the options provided:

Frequent irrigation of the crop: While regular irrigation is essential for crop health, excessive irrigation won't necessarily address the issue of yellowing leaves, unless the yellowing is due to drought stress.
Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer: Cytokinins can promote cell division and delay aging, but their primary role is not directly related to chlorophyll synthesis.
Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxyacetic acid: This approach may not solve the fundamental problem, as it doesn't address the cause of yellowing.
Application of iron and magnesium to promote synthesis of chlorophyll: This is the correct answer. Iron and magnesium are crucial micronutrients in the synthesis of chlorophyll, the green pigment in plants. Deficiency of these elements leads to chlorosis or yellowing of leaves. Providing these nutrients helps in the maintenance and synthesis of chlorophyll, which can lead to healthier plants and potentially higher yields.

The pre-mature yellowing of leaves is often due to nutrient deficiencies, particularly chlorophyll-related nutrients like iron and magnesium. Application of these will promote the synthesis of chlorophyll, thus preventing yellowing and potentially enhancing seed yield.

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

The Correct Option is D

Solution and Explanation

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