Transport in Plants

State Council of Educational Research and Training, Tamil Nadu (2020) Transport in Plants. [Teaching/Learning Resource]

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Over 450 million years ago (the Ordovician period in Paleozoic era) plants migrated from their own sophisticated water world to newly formed land. The land had harsh environment; water availability was deeper and so plants struggled for getting water for their very existence. Some of them failed to survive and rest adopted themselves to the new world. The biggest adaptations followed for their survival was building their own water absorbing systems to draw water from deep inside the land. The creation and updating of water absorbing system (vascular tissues) led to the diversity of the plant kingdom. The gregarious growth of prehistoric pteridophytes, gymnosperms and present-day flowering plants led to the biggest challenge in the transport of water from root to several meters high trees against gravity. In this chapter, we will study the events taking place between the gain of water in roots and loss in leaves and the mechanisms behind the basic physical and biological processes in the movement of water, gases and minerals in plants. Further, we study how food material synthesized in the leaf can be transported to various utilizing and storage areas against struggles and challenges.

Item Type: Teaching/Learning Resource
Program: A publication under Free Textbook Programme of Government of Tamil Nadu
Learning outcomes: The learner will be able to, • Recall knowledge of basic physical and biological processes studied in previous classes. • Classify, differentiate and compare the process of active and passive transport. • Understand the mechanism of absorption of water. • Analyse the various theories in ascent of sap. • Understand the process of transpiration and Compare the various types of transpiration. • Discuss the mechanism of phloem translocation. • Understand the process behind mineral absorption.
Access: Open
Uncontrolled Keywords: Plant physiology
Subjects: Biology
Curriculam Level: 5. Senior Secondary
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Depositing User: COL Staff
Date Deposited: 11 Apr 2021 03:59
Last Modified: 22 Apr 2021 00:22

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