ODWS icon

The Open Door Web Site
HOMEPAGE CHEMISTRY PHYSICS ELECTRONICS HISTORY HISTORY OF SCI & TECH MATH STUDIES LEARNING FRENCH STUDY GUIDE  PHOTO GALLERY
BIOLOGY HOMEPAGE  IB BIOLOGY WEB TOPIC CHAPTERS FACTS & FIGURES LABORATORY WORK QUESTIONS & QUIZZES ECOLOGY CLUB PLAYS

 

 

Part XVIII: Energy and Activity : How Plants
Survive in Winter Index

Seeds and the Conditions Needed for Seed Germination
Underground Storage Organs
Trees in Winter
Chapter Summary (useful for revision)
Questions relating to this chapter

Topic Chapters Index

 

Other Ways of Surviving Winter

Rhizomes

Some plants, such as the fern, survive the winter as an underground stem called a rhizome.

Diagram of a rhizome © Shirley Burchill

1 = The fern's leaves above ground die during the winter months
2 = New shoots will be able to grow in the spring using the food energy stored in the rhizome

 

Survival Above Ground for an Evergreen

Some trees lose their leaves in the winter.
Pine trees do not. The pine needles survive throughout the winter.

Pine needles © Paul Billiet

Trees which lose their leaves in winter are called deciduous trees. Those which keep their leaves or needles all year are called evergreen trees. The photograph shows examples of both. The evergreens are in the background and the deciduous trees in the foreground have lost their leaves for winter.

 

ENERGY AND ACTIVITY

Custom Search

How Plants Survive Winter : Introduction

 

Derbyshire moors in winter © Shirley Burchill

Derbyshire moors in winter

 

Winter is a difficult season for plants as ell as animals. The number of hours of daylight is shorter so there is less sunlight. Without sunlight green plants cannot photosynthesize and make their food. The cold temperatures of winter slow them down and stops their growth. Freezing temperatures stop water from circulating in the plants' sap.

Like animals, some plants survive through the winter in resting stages. Plants that we call annuals only live for one year. They grow, reproduce and die at the end of summer. It is the seeds of annual plants that survive through winter. These seeds will germinate and grow the following spring.

Some plants survive as underground storage organs: tubers, such as potatoes, tap roots, such as carrots, and bulbs, such as onions. These plants store food reserves in their underground storage organs during the summer and autumn. In the following spring these food reserves are used to grow new leaves and shoots above ground. Many of these plants are called perennials because they do this year after year. In addition these plants will also produce large numbers of seeds each year.

 

Deciduous tree in winter, Hyde Park, London © Shirley Burchill

Deciduous tree in winter, Hyde Park, London

 

There are also those plants, the trees, which add new branches and roots to their bodies each year. Trees have to survive all winter with their trunks and branches above ground all winter, exposed to the cold, freezing winds and snow.

 

Survival Above Ground for a Deciduous Tree

Detail of a chestnut bud © Paul Billiet

In autumn, the chestnut tree drops its leaves and the tree becomes dormant for the winter. Already the buds can be seen from which the next year's leaves will grow. This is how the chestnut tree prepares to survive winter.

 

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.

Donate to the Open Door Web Site using PayPal

SITE MAP
WHAT'S NEW?
ABOUT

PRIVACY

COPYRIGHT

SPONSORSHIP

DONATIONS

ADVERTISING

© The Open Door Team 2017
Any questions or problems regarding this site should be addressed to the webmaster

© Paul Billiet and Shirley Burchill 2017

Hosted By
Web Hosting by HostCentric


SiteLock