Gas exchange and leaf water status in potted plants of Copaifera langsdorffii. 2. Probable influence of low air humidity

Title:

Gas exchange and leaf water status in potted plants of Copaifera langsdorffii. 2. Probable influence of low air humidity

Creator:

Prado, C.H.B.A., de Moraes, J.A.P.V., and de Mattos, E.A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:87112167-f33a-405c-8368-2db9f707d53c
uuid:87112167-f33a-405c-8368-2db9f707d53c
urnnbn:urn:nbn:cz:aba007-000fmq

Subject:

daily courses of gas exchange, leaf-air water vapour concentration difference, leaf water potential, net photosynthetic rate, soil moisture, stomatal conductance, and water use efficiency

Type:

model:internalpart and TEXT

Format:

print

Description:

The influence of air humidity on leaf-air gas exchange and leaf water potential (4^) was investigated during daily courses in control and water stressed potted young plants of Copaifera langsdorffii. When leaf-air water vapour concentration difference (AW) increased during the day, stomatal conductance (g^) and net photosynthetic rate (P]vj) decreased under both soil moistures. Moderate AW induced lower values of g^ and Pn unwatered than control plants, High AW in atmosphere produced strong depression in g^ (from 0.22 to 0,01 mol m'^ s’’) and (from 6.5 to 0.7 pmol m'2 s'*) in control plants around midday, with recuperation of T'. Expected conductance tese) was calculated as fimction of AW, which was useful for discriminating soil to atmosphere water stress. In špite of momentary T or soil water stress, P^, g^, and water use efficiency decreased when AW increased during day course.

Language:

Multiple languages

Rights:

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

Coverage:

31-36 and 33-38

Source:

Photosynthetica | 1995 Volume:31 | Number:1

Harvested from:

CDK

Metadata only:

false