The response of different plant life forms to the natural environment changes

Svetlana Schmidt,Christian Schmidt

doi:10.5922/2074-9848-2011-1-4

Abstract

26 This paper contains test results revealing norm and stress reactions of various life-form plants: trees — Betula pendula Roth, Tilia platyphyllos Scop., Pinus sylvetris L; water-plant -Galium palustre L.; grass — Solidago Canadensis; cereal — Secale cereale L. Collection and processing of the material was made in the area of Berlin/Brandenburg, Germany. Clark sensor-based method made it possible to determine the amount and rate of the oxygen evolution by plants in the dark and light phase. Under the reaction norm the average amount of the oxygen evolved and the average rate of metabolism processes during dark and light phases are changing simultaneously. Parabolic and periodic dependences of these changes during the vegetation period has been found. Under the stress reaction (drought, illness) the rate of metabolism dark reactions is increased by 2—3 times as compared with light reactions. The obtained results may be use for bioindication of the climate change in the Baltic Region.

Highlights

The physiological process is conditioned by a number of environmental factors which determine the biosystem response to stress
Oxygen evolved in the course of the photosynthesis is an indicator of organelles and plant cells response to external and internal changes, its seasonal rhythm within the vegetation year is a result of the organism adaptation of many years
The photosynthetic activity was assessed on the basis of oxygen evolved by a photosynthetic plant in dark and light phase with the help of Plant Vital 5000 device, which works on the basis of Clark sensor

Summary

THE RESPONSE OF DIFFERENT PLANT LIFE FORMS TO NATURAL ENVIRONMENT CHANGES

This paper contains test results revealing norm and stress reactions of various life-form plants: trees — Betula pendula Roth, Tilia platyphyllos Scop., Pinus sylvetris L; water-plant -Galium palustre L.; grass — Solidago Canadensis; cereal — Secale cereale L. Collection and processing of the material was made in the area of Berlin/Brandenburg, Germany. Clark sensor-based method made it possible to determine the amount and rate of the oxygen evolution by plants in the dark and light phase. Under the reaction norm the average amount of the oxygen evolved and the average rate of metabolism processes during dark and light phases are changing simultaneously. Under the stress reaction (drought, illness) the rate of metabolism dark reactions is increased by 2—3 times as compared with light reactions. The obtained results may be use for bioindication of the climate change in the Baltic Region

Introduction

Research methods

Seasonal oxygen rhythms of plants and environment stress factors