Page 8 - Biology_Form_3

Chapter
One

FOR ONLINE READING ONLY
Coordination in plants

Introduction

Plants are made up of different parts which work together in a coordinated manner
to perform various functions. The interaction of different plant structures in response
to external and internal stimuli is called coordination. Plant coordination involves
the communication between cells, tissues, and organs, allowing the plant to adapt
to its environment effectively. In this chapter you will learn about coordination
in plants including tropic and nastic responses. The competencies developed
will enable you to understand factors that can promote healthy plant growth and
maximise crop productivity.

Think stimuli is not the same as in animals. Plants
respond to environmental changes by using
hormones.

Concept of coordination in plants Most plants are fixed on the ground and
are incapable of moving from one place to
Task 1.1 another. However, parts of plants such as
Search for information from the library leaves, stems and roots show some growth
and internet sources about the concept of responses away or towards stimuli such
coordination in plants. Write short notes as water, light, touch, and gravity. These
about the searched information. responses result into movement of growth
Plants use their parts to detect changes called movement of curvature or growth
in the environment. Plants can detect and of curvature. Movement of curvature
respond to stimuli including light, gravity, enables plants to get their requirements
chemicals, water and touch. The changes in such as nutrients and water. Plant response
the environment are called stimuli. can be either towards or away from the
stimulus. Movement or growth of curvature
Although plants can respond to various is categorised in two major groups namely:
stimuli around them, the response to such self-controlling growth movement called

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