Changes in photosynthesis, xanthophyll cycle, and sugar accumulation in two North Australia tropical species differing in leaf angles

Title:

Changes in photosynthesis, xanthophyll cycle, and sugar accumulation in two North Australia tropical species differing in leaf angles

Creator:

Xu, S.-M., Liu, L.-X., Woo, K. C., and Wang, D.-L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:27053ac1-4639-4854-b368-ecd1f5c5ec40
uuid:27053ac1-4639-4854-b368-ecd1f5c5ec40
issn:0300-3604
doi:10.1007/s11099-007-0059-4

Subject:

Acacia, diurnal changes, Eucalyptus, leaf angle, leaf morphology, osmoregulation, and photoprotection

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Two tropical species of North Australia, Acacia crassicarpa and Eucalyptus pellita, have similar leaf size and leaf structure but different leaf angles. A. crassicarpa with near vertical leaf angle directly reduced photon absorption and leaf temperature (Tl) and had relatively high photosynthetic activity (Pmax) and low xanthophyll cycle activity. In contrast, E. pellita with a small leaf angle exhibited high Tl, low Pmax, and high activity of xanthophyll cycle which was useful for the dissipation of excessive energy and reduction of photoinhibition. In the dry season, contents of soluble sugars including pinitol, sucrose, fructose, and glucose in A. crassicarpa increased whereas larger amounts of only fructose and glucose were accumulated in E. pellita. Different sugar accumulation may be involved in osmotic adjustment of leaves during water stress that makes photosynthesis more efficient. The leaf angle may be critical for developing different protective mechanisms in these two tropical tree species that ensure optimal growth in the high irradiance and drought stress environment in North Australia. and S.-M. Xu ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

348-354

Source:

Photosynthetica | 2007 Volume:45 | Number:3

Harvested from:

CDK

Metadata only:

false