Developmental phase-dependent photosynthetic responses to ultraviolet-B radiation: damage, defence, and adaptation of primary leaves of wheat seedlings

Title:

Developmental phase-dependent photosynthetic responses to ultraviolet-B radiation: damage, defence, and adaptation of primary leaves of wheat seedlings

Creator:

Pradhan, M. K., Nayak, L., Joshi, P. N., Mohapatra, P. K., Patro, L., Biswal, B., and Biswal, U. C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:2a9e81db-b9c8-464a-966b-bb5cd87c9312
uuid:2a9e81db-b9c8-464a-966b-bb5cd87c9312
issn:0300-3604
doi:10.1007/s11099-008-0067-z

Subject:

anthocyanin, carotenoids, chlorophyll, flavonoids, O2 evolution, photosynthetically active radiation, phases of leaf development, senescence, and thylakoid membrane

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Alterations in photosynthetic capacity of primary leaves of wheat seedlings in response to ultraviolet-B (UV-B; 280-320 nm; 60 µmol m-2 s-1) exposure alone and in combination with photosynthetically active radiation (PAR; 400-800 nm; 200 µmol m-2 s-1) during different phases of leaf growth and development were assessed. UV-B exposure resulted in a phase-dependent differential loss in photosynthetic pigments, photochemical potential, photosystem 2 (PS2) quantum yield, and in vivo O2 evolution. UV-B exposure induced maximum damage to the photosynthetic apparatus during senescence phase of development. The damages were partially alleviated when UV-B exposure was accompanied by PAR. UV-B induced an enhancement in accumulation of flavonoids during all phases of development while it caused a decline in anthocyanin content during senescence. The differential changes in these parameters demonstrated the adaptation ability of leaves to UV-B stress during all phases of development and the ability was modified in UV-B+ PAR exposed samples. and M. K. Pradhan ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

370-377

Source:

Photosynthetica | 2008 Volume:46 | Number:3

Harvested from:

CDK

Metadata only:

false