No evidence for photoinhibition of photosynthesis in alpine Caltha leptosepala DC Academic Article

abstract

  • © 2015, Swiss Botanical Society.Alpine plants experience high levels of insolation, as well as cold nighttime temperatures throughout the summer growth period. These two stress factors in combination are now recognized as potentially important limitations to photosynthetic carbon gain. Although likely candidates, the possible occurrence of photoinhibition in alpine plants has been reported infrequently. We measured photoinhibitory stress under natural field conditions and after high-light treatments in an herbaceous species (Caltha leptosepala DC) with structural traits that appeared especially susceptible to photoinhibition, i.e., large, broad, laminar leaves with a near-horizontal leaf orientation. Although photosynthesis declined gradually during the afternoon under natural field conditions, no evidence was found for photoinhibition of photosynthesis, despite incident sunlight levels of (Formula presented.). Also, values of (Formula presented.) (an indicator of dynamic photoinhibition) changed little (

publication date

  • 2015/4/1

keywords

  • Caltha
  • alpine plants
  • carbon
  • cold
  • indicator
  • insolation
  • leaves
  • photoinhibition
  • photosynthesis
  • solar radiation
  • summer
  • temperature

International Standard Serial Number (ISSN)

  • 1664-2201

number of pages

  • 10

start page

  • 41

end page

  • 50