Different ability of three Mediterranean oak species to tolerate progressive water stress

Title:

Different ability of three Mediterranean oak species to tolerate progressive water stress

Creator:

Manes, F., Vitale, M., Donato, E., Giannini, M., and Puppi, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a08f6b69-1234-4c10-918c-aef1e9f66911
uuid:a08f6b69-1234-4c10-918c-aef1e9f66911
issn:0300-3604
doi:10.1007/s11099-006-0040-7

Subject:

gas exchange, Quercus, net photosynthetic rate, root morphology, species differences, stomatal conductance to water vapour, transpiration, and xylem

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Inter-comparisons in the gas exchange patterns and root characteristics under both well-watered and drought conditions were done in three-years-old seedlings of three oak species (Quercus cerris L., Q. frainetto Ten., and Q. ilex L.) growing in controlled environment. Well-watered Q. cerris had greater physiological performances than other oaks, but under drought it was not able to face the water stress showing also structural modifications such as reduction of root length and average diameter. On the other hand, Q. ilex maintained root growth both in drought or well-watered soils. Moreover, it was able to keep open stomata also under water stress, although stomatal conductance (gs) was low. Q. frainetto had an intermediate position in regard to its physiological and root structural characteristics between Q. cerris and Q. ilex under drought stress. For all oaks the relationship between gs and the ratio of sub-stomatal and ambient CO2 concentration (Ci/Ca) highlighted the dynamic adaptation of gs to the increase of hydraulic resistances of leaf, stem, and roots portions, more evident during the air humidity change and progressive soil dehydration. This suggests a well-triggered above-and under-ground mechanism to endure the drought stress. and F. Manes ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

387-393

Source:

Photosynthetica | 2006 Volume:44 | Number:3

Harvested from:

CDK

Metadata only:

false