THE ROLE OF MALATE-DEHYDROGENASE IN DISSIPATING EXCESS ENERGY UNDER WATER-STRESS IN 2 WHEAT SPECIES

Authors
BIEHLER K MIGGE A FOCK HP
Citation
K. Biehler et al., THE ROLE OF MALATE-DEHYDROGENASE IN DISSIPATING EXCESS ENERGY UNDER WATER-STRESS IN 2 WHEAT SPECIES, Photosynthetica, 32(3), 1996, pp. 431-438
Citations number
20
Categorie Soggetti
Plant Sciences
Journal title
Photosynthetica → ACNP
ISSN journal
03003604
Volume
32
Issue
3
Year of publication
1996
Pages
431 - 438
Database
ISI
SICI code
0300-3604(1996)32:3<431:TROMID>2.0.ZU;2-U
Abstract
Gas exchange, chlorophyll fluorescence and the activity of the chlorop last NADPH-malate dehydrogenase (NADPH-MDH; EC 1.1.1.82) in relation t o the leaf water potential was measured in Triticum aestivum and T. ko tschyi. In case of restricted CO2 assimilation under water stress, T. aestivum degraded the surplus of photosynthetic electrons by activatio n of the NADP-MDH whereas T. kotschyi did not. This activation was not evident, when stomatal diffusion resistance was overcome by an increa sed CO2 partial pressure in the surrounding air.