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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

A plant in your garden is undersized and develops chlorotic leaves even though you fertilize it with a mixture that contains nitrogen, potassium, and phosphorus. After determining that the plant receives enough sunlight for photosynthesis, you next decide to test whether some other aspect of its mineral nutrition is adequate. What specific hypothesis will your experiment test? How will your experimental design test the hypothesis?

Summary Introduction

To review:

The hypothesis which will determine the reason for the chlorotic leaves and stunted growth of a plant in a garden, despite the use of fertilizer containing a mixture of nitrogen, potassium and phosphorous.

Introduction:

Plant nutrition is defined as the study of chemical elements and compounds, essential for the plant growth and metabolism. In 1972, Emanuel Epstein describes two criteria for an element to be considered as essential for plant growth:

The absence of it makes the plant unable to complete a normal life cycle.

The element makes a part of some essential plant constituent or metabolite.

Plants generally require 17 essential elements, 9 among them are macronutrients which are required and incorporate in relatively large amounts in plant tissues. The other category of minerals is known as micronutrients, as plant require them in trace amounts.

Explanation

The hypothesis based on the chlorotic leaves and stunted or undersized growth of a plant, despite the use of fertilizer containing a mixture of nitrogen, potassium and phosphorous should be as follows: “Micronutrients are an important group of elements, which are essentially required by the plants in addition to macronutrients, for its proper growth and development”. The symptoms shown by the mentioned plant indicates that there should be a nutrient deficiency in the plant. As the supply of NPK (nitrogen, potassium, phosphorous) supplemented fertilizer is unable to overcome the deficiency symptoms, there may be a micronutrient deficiency...

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