Comparative anatomical, morphological, and physiological parameters controlling photosynthesis in two Populusxeuramericana clones during short-term osmotic treatment

Title:

Comparative anatomical, morphological, and physiological parameters controlling photosynthesis in two Populusxeuramericana clones during short-term osmotic treatment

Creator:

Courtois, M., Boudouresque, E., and Guerrier, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7ceb4a64-cf6b-4ac7-a55e-62c4c563ed0e
uuid:7ceb4a64-cf6b-4ac7-a55e-62c4c563ed0e
issn:0300-3604
doi:10.1023/A:1007023030704

Subject:

active oxygen species, aminolevulinate dehydratase, antioxidants, carboxylation, carotenoids, chlorophyll, chlorophyllase, poplar, ribulose-1,5-bisphosphate carboxylase, oxygenase, and stomatal conductance

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The relationships between drought response and anatomical/physiological properties were assessed in two poplar clones belonging to the Aigeros section: Populusxeuramericana clone Dorskamp (drought-tolerant) and clone Luisa Avanzo (drought-sensitive). Cuttings of both clones were exposed for 12 h to 0 mM (control). 50 mM (osmotic potential -0.112 MPa), and 150 mM (-0.336 MPa) mannitol. In control, Dorskamp had smaller stomata than Luisa Avanzo, one or two layers of palisade cells, a spongy mesophyll, and high concentrations of antioxidative compounds (ascorbate, glutathione). After exposure to 50 or 150 mM mannitol, both clones closed their stomata: leaf conductance and opening of stomata decreased. When exposed to 50 mM mannitol, net photosynthetic rate (PN) and chlorophyll (Chl) and total solute contents remained stable; ribulose-1,5-bisphosphate carboxylase/-oxygenase activity, Chl synthesis and turn-over, ascorbate peroxidase and glutathione reductase activities were less affected in Dorskamp than in Luisa Avanzo. Following an exposure to 150 mM mannitol, Dorskamp exhibited higher PN and higher contents of antioxidants (ascorbate, glutathione) and antioxidative enzymes (ascorbate peroxidase, glutathione reductase) than Luisa Avanzo. Hence the drought-tolerant poplar was able to better avoid and tolerate osmotic stress. and M. Courtois, E. Boudouresque, G. Guerrier.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

87-96

Source:

Photosynthetica | 1999 Volume:37 | Number:1

Harvested from:

CDK

Metadata only:

false