Physiological divergences between two rhizomatous grasses from a desertification steppe, North China

Title:

Physiological divergences between two rhizomatous grasses from a desertification steppe, North China

Creator:

Wang, R. Z.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f5939154-6fad-4681-8f92-71c38d3222c3
uuid:f5939154-6fad-4681-8f92-71c38d3222c3
issn:0300-3604
doi:10.1007/s11099-007-0078-1

Subject:

adaption to drought, Calamagrostis epigeios, net photosynthetic rate, Psammochloa villosa, stomatal conductance, transpiration, and water relations

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The inter-and intra-specific physiological differences, e.g. rates of net photosynthesis (PN) and transpiration (E), stomatal conductance (gs), and water use efficiency (WUE), were compared between two grasses, Calamagrostis epigeios (L.) Roth. and Psammochloa villosa (Trin.) Bor., and between their leaf types in a desertification steppe in North China. The two species had a similar habitat, but differed in leaf area and rhizome depth. Leaf PN, E, and g s for P. villosa were significantly greater than those for C. epigeios in the growing season, but WUE for the former species was only 50 and 80 % of that for the latter one in dry and rainy seasons, respectively. In general, leaf PN, E, g s, and WUE for both vegetative and reproductive shoots of the two species exhibited little variations between leaf types or with leaf age, even though there were some remarkable differences between dry and rainy seasons. The mean leaf PN and E in reproductive shoots of P. villosa were significantly lower than those in its vegetative shoots in rainy season, while these differences were much smaller for those of C. epigeios. P. villosa with deeper rhizome roots has relative higher leaf PN, E, and g s, but a smaller WUE in the arid desertification steppe region.

Language:

Multiple languages

Rights:

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

Coverage:

463-468

Source:

Photosynthetica | 2007 Volume:45 | Number:3

Harvested from:

CDK

Metadata only:

false