Juvenile tank-bromeliads lacking tanks: do they engage in CAM photosynthesis?

Title:

Juvenile tank-bromeliads lacking tanks: do they engage in CAM photosynthesis?

Creator:

Beltrán, J. D., Lasso, E., Madriñán, S., Virgo, A., and Winter, K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:edce3617-f79f-4bf6-8682-febdea6c3796
uuid:edce3617-f79f-4bf6-8682-febdea6c3796
issn:0300-3604
doi:10.1007/s11099-012-0077-8

Subject:

botanika, botany, bromeliads, CO2 exchange, carbon isotope discrimination, crassulacean acid metabolism, drought stress, Guzmania, heteroblasty, photosynthesis, Werauhia, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In the epiphytic tillandsioids, Guzmania monostachia, Werauhia sanguinolenta, and Guzmania lingulata (Bromeliaceae), juvenile plants exhibit an atmospheric habit, whereas in adult plants the leaf bases overlap and form water-holding tanks. CO2 gas-exchange measurements of the whole, intact plants and δ13C values of mature leaves demonstrated that C3 photosynthesis was the principal pathway of CO2 assimilation in juveniles and adults of all three species. Nonetheless, irrespective of plant size, all three species were able to display features of facultative CAM when exposed to drought stress. The capacity for CAM was the greatest in G. monostachia, allowing drought-stressed juvenile and adult plants to exhibit net CO2 uptake at night. CAM expression was markedly lower in W. sanguinolenta, and minimal in G. lingulata. In both species, low-level CAM merely sufficed to reduce nocturnal respiratory net loss of CO2. δ13C values were generally less negative in juveniles than in adult plants, probably indicating increased diffusional limitation of CO2 uptake in juveniles., J. D. Beltrán ... [et al. ]., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

55-62

Source:

Photosynthetica | 2013 Volume:51 | Number:1

Harvested from:

CDK

Metadata only:

false