Peanut photosynthesis under drought and re-watering

Title:

Peanut photosynthesis under drought and re-watering

Creator:

Lauriano, J. A., Ramalho, J. C., Lidon, F. C., and do Céu Matos, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:03a3bff4-b118-4a2e-94d2-14985209399e
uuid:03a3bff4-b118-4a2e-94d2-14985209399e
issn:0300-3604
doi:10.1023/B:PHOT.0000040567.42444.c2

Subject:

Arachis, cultivar differences, photosynthetic electron transport, photosystems 1 and 2, ribulose-1,5-bisphosphate carboxylase/oxygenase, stomatal conductance, transpiration rate, and water stress

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The photosynthetic response of three Arachis hypogaea L. cultivars (57-422, 73-30, and GC 8-35) grown for two months was measured under water available conditions, severe water stress, and 24, 72, and 93 h following re-watering. At the end of the drying cycle, all the cultivars reached dehydration, relative water content (RWC) ranging between 40 and 50 %. During dehydration, leaf stomatal conductance (gs), transpiration rate (E), and net photosynthetic rate (PN) decreased more in cvs. 57-422 and GC 8-35 than in 73-30. Instantaneous water use efficiency (WUEi) and photosynthetic capacity (Pmax) decreased mostly in cv. GC 8-35. Except in cv. GC 8-35, the activity of photosystem 1 (PS1) was only slightly affected. PS2 and ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO) were the main targets of water stress. After re-watering, cvs. 73-30 and GC 8-35 rapidly regained gs, E, and PN activities. Twenty-four hours after re-watering, the electron transport rates and RuBPCO activity strongly increased. PN and Pmax fully recovered later. Considering the different photosynthetic responses of the studied genotype, a general characterisation of the interaction between water stress and this metabolism is presented. and J. A. Lauriano ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

37-41

Source:

Photosynthetica | 2004 Volume:42 | Number:1

Harvested from:

CDK

Metadata only:

false