BIOLOGY 12E CONNECT ACCESS CARD
BIOLOGY 12E CONNECT ACCESS CARD
12th Edition
ISBN: 9781264938513
Author: Raven
Publisher: MCG
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Chapter 39, Problem 1DA
Summary Introduction

To explain: That how differences in red to far-red light ratio arise and the impact they have on plants grown in different environments.

Introduction: The plants are mainly multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. The parts of plants include stem, roots, leaves, flowers, fruit, and seeds. The leaves are a part of plants that are generally green and attached to it by a stalk or stem.

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The red light is absorbed by the leaves at a greater rate than the far-red light, as the sunlight passes by the canopy. The relative amounts of far-red and red light are integrated by plant signaling through phytochrome to regulate the growth and development of plants. For example, germination of seed is inhibited as the relative amount of far-red light increases. Therefore, in a below shady canopy, germination of seeds would have less chance of survival because of reduced photosynthesis. Alternatively, the information about the reduced sunlight could signal rapid elongation of stem to get the plants closer to adequate sunlight for photosynthesis.

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