Chapter 37 - CR97-03

Chapter 37 - CR97-03 - Chapter 37 Chapter 37 Plant...

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Unformatted text preview: Chapter 37 Chapter 37 Plant Nutrition 1 of 14 of 14 Overview: A Nutritional Network Overview: A Nutritional Network Every organism continually exchanges energy and materials with its environment For a typical plant, water and minerals come from the soil, while carbon dioxide comes from the air The branching root system and shoot system of a vascular plant ensures extensive networking with both reservoirs of inorganic nutrients Figure 37.1 2 of 14 of 14 37.1: Plants require certain chemical 37.1: Plants require certain chemical elements to complete their life cycle elements to complete their life cycle Plants derive most of their organic mass from the CO 2 of air, b ut they also depend on soil nutrients such as water and minerals Leaves use CO 2 and release H 2 O and O 2 Roots use O 2 and H 2 O and release CO 2 Macronutrients and Micronutrients More than 50 chemical elements have been identified as being used among the inorganic substances in plants but not all of these are essential A chemical element is considered essential if it is required for a plant to complete a life cycle 3 of 14 of 14 Essential elements in plants Essential elements in plants Table 37.1 4 of 14 of 14 Nine essential elements are macronutrients Plants require them in relatively large amounts Eight essential elements are micronutrients Plants need them in very small amounts The symptoms of mineral deficiency depend on: The nutrients function The mobility of a nutrient within the plant Deficiency of a mobile nutrient usually affects older organs more than young ones Younger tissues have more drawing power Deficiency of a less mobile nutrient usually affects younger organs more than older ones Older tissues can rely on stored supplies for short periods 5 of 14 of 14...
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Chapter 37 - CR97-03 - Chapter 37 Chapter 37 Plant...

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