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Articles containing the keyword 'chlorophyll fluorescence'

Category : Research article

article id 292, category Research article

Sanna Susiluoto, Frank Berninger. (2007). Interactions between morphological and physiological drought responses in Eucalyptus microtheca. Silva Fennica vol. 41 no. 2 article id 292. https://doi.org/10.14214/sf.292

Keywords: photosynthesis; chlorophyll fluorescence; root/shoot ratio; RuBP; xylem permeability

Abstract | View details | Full text in PDF | Author Info

We studied the response of Eucalyptus microtheca to drought in a greenhouse experiment. As a result of the drought the growth of the seedlings decreased and allocation patterns changed so that allocation to the roots increased. However, changes in photosynthesis and stomatal conductance under drought were rather modest. We showed, using chlorophyll fluorescence and measurements of photosynthesis under high CO₂ that the biochemical capacity of photosynthesis increased under drought. The results suggest that changes in root/shoot ratio are the primary reactions that initiate a series of compensatory reactions that mitigate the effects of drought in Eucalyptus microtheca.

Susiluoto, University of Helsinki, Department of Forest Ecology, PL 27, 00014 University of Helsinki, Finland E-mail: sannamaija.susiluoto@helsinki.fi
Berninger, Departement des Sciences biologiques, Université du Québec à Montréal, CP 8888 Succ Centre Ville, Montreal, Canada E-mail: fb@nn.ca

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