Photosynthetic light and carbon dioxide response of the invasive tree, Vochysia divergens Pohl, to experimental flooding and shading

Title:

Photosynthetic light and carbon dioxide response of the invasive tree, Vochysia divergens Pohl, to experimental flooding and shading

Creator:

Dalmolin, A. C., Dalmagro, H. J., Lobo, F. de A., Antunes Jr., M. Z., Ortíz, C. E. R., and Vourlitis, G. L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:524abccd-7ca1-4bd2-b454-535e77908bdc
uuid:524abccd-7ca1-4bd2-b454-535e77908bdc
issn:0300-3604
doi:10.1007/s11099-013-0034-1

Subject:

fotosyntéza, photosynthesis, Brazilian Pantanal, CO2 and light-response curves, ecophysiology, invasive plants, tropical wetlands, 2, and 581

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Vochysia divergens Pohl is considered to be a flood-adapted, light-demanding pioneer species that has been invading grasslands of the Brazilian Pantanal. In these areas, a successful invasion requires an ability to tolerate physiologically wide fluctuations in surface hydrology and shading induced by a dense cover of grasses and other vegetation. We evaluated how flooding and shading affected the photosynthetic performance of V. divergens saplings by measuring light-saturated gas exchange (net photosynthetic rate, PN; stomatal conductance, gs), and intercellular CO2 (PN/Ci) and photosynthetic photon flux density (PN/PPFD) response curves over a 61-d field experiment. Shading and flooding reduced significantly light-saturated PN and gs and affected multiple aspects of the leaf gas exchange response of V. divergens to variations in PPFD and CO2. Flooding influenced the physiology of this species more than shading. Given the success of V. divergens at invading and expanding in seasonally flooded areas of the Pantanal, the results were surprising and highlighted the physiological ability of this species to tolerate suboptimal conditions. However, the consistently higher light-saturated PN and gs under nonflooded conditions suggested that the invasive success of V. divergens might not be related to its physiological potential during flooding, but to situations, when flooding recedes during the dry season and soil water availability is adequate. and A. C. Dalmolin ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

379-386

Source:

Photosynthetica | 2013 Volume:51 | Number:3

Harvested from:

CDK

Metadata only:

false