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Plant Physiological Responses to Climate and Environmental Change

  1. Guy F Midgley

Published Online: 28 SEP 2007

DOI: 10.1002/9780470015902.a0003205

eLS

eLS

How to Cite

Midgley, G. F. 2007. Plant Physiological Responses to Climate and Environmental Change. eLS. .

Author Information

  1. South African National Biodiversity Institute, Pretoria, South Africa

Publication History

  1. Published Online: 28 SEP 2007

Abstract

A future climate and environmental regime will affect plant physiology and induce higher order responses. Implications of rising atmospheric carbon dioxide are positive for plant growth, but less so than predicted from the theory of photosynthesis, because of feedback effects within the plant, and from ecosystem level feedback effects. Rising temperatures will reduce freezing and chill stress incidence, but warming will increase metabolic rates. High extremes will induce heat-shock responses. Higher plants are physiologically well-defended against projected increases in UV-B. Interactions between stresses will be multifaceted, but theory is poorly developed to make projections of their net result. A focus on testing theory using field-based experiments will be an important way forward.

Keywords:

  • acclimation;
  • global change;
  • heat shock;
  • photosynthesis;
  • respiration;
  • stress