Differential photosynthetic performance of three Mediterranean shrubs under grazing by domestic goats

Title:

Differential photosynthetic performance of three Mediterranean shrubs under grazing by domestic goats

Creator:

Redondo-Gómez, S., Mancilla-Leytón, J. M., Mateos-Naranjo, E., Cambrollé, J., and Martín-Vicente, A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:37eb7b36-2866-4602-a01e-27159bd58e72
uuid:37eb7b36-2866-4602-a01e-27159bd58e72
issn:0300-3604
doi:10.1007/s11099-010-0045-0

Subject:

botanika, botany, chlorophyll fluorescence, gas exchange, photosynthetic pigments, and stomatal conductance

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The impact of grazing by domestic goats, Capra hircus, on the photochemical apparatus of three co-ocurring Mediterranean shrubs, Erica scoparia, Halimium halimifolium, and Myrtus communis was evaluated. Seasonal course of gas exchange, chlorophyll fluorescence and photosynthetic pigment concentrations were measured in the field in grazed and ungrazed plants. Net photosynthetic rate was higher in grazed plants of E. scoparia and H. halimifolium in May, while there were not significant differences in M. communis. Photosynthetic enhancement in grazed plants of E. scoparia could be explained largely by higher stomatal conductance. On the other hand, the lack of differences in stomatal conductance between grazed and ungrazed plants of H. halimifolium could indicate that carboxylation efficiency, and ribulose-1,5-bisphosphate (RuBP) regeneration may have been enhanced by grazing. Overall grazing has little effect on the photochemical (PSII) apparatus, however grazed plants of M. communis showed chronic photoinhibition in the short term. Finally, seasonal variations recorded on photosynthesis, photochemical efficiency and pigment concentrations may be a physiological consequence of environmental factors, such as summer drought and competition for light, rather than an adaptation to grazing. and S. Redondo-Gómez ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

348-354

Source:

Photosynthetica | 2010 Volume:48 | Number:3

Harvested from:

CDK

Metadata only:

false