Effects of enhanced ultraviolet-B (280-320 nm) radiation on growth and photosynthetic activities in aquatic fern Azolla Microphylla Kaulf.

Title:

Effects of enhanced ultraviolet-B (280-320 nm) radiation on growth and photosynthetic activities in aquatic fern Azolla Microphylla Kaulf.

Creator:

Jayakumar, M., Eyini, M., Lingakumar, K., and Kulandaivelu, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:13207ca9-76eb-4b47-a122-c0c9d8caee46
uuid:13207ca9-76eb-4b47-a122-c0c9d8caee46
issn:0300-3604
doi:10.1023/A:1020154526655

Subject:

biomass, carotenoids, chlorophyll, doubling time, fluorescence induction, heterocyst, photosystem 2, and relative growth rate

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The effects of enhanced UV-B radiation on growth and photosynthetic activities were investigated in fronds of the aquatic fern Azolla microphylla Kaulf. The fronds were exposed to UV-B radiation intermittently once in 3 d during 12 d. Biomass and relative growth rate of UV-B treated Azolla plants and the heterocyst frequency of the UV-B treated symbiont decreased resulting in an increase in doubling time over the control. The doubling time was 3.08 d for control and 3.35 d for UV-B irradiated plants. Chl and carotenoid contents per unit fresh mass and photosystem 2 (PS2) activity also decreased under UV-B treatment. Measurements of photosynthetic activity in terms of fluorescence kinetics and PS2 mediated O2 evolution showed that the aquatic fern Azolla is sensitive to UV-B damage. and M. Jayakumar ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

85-89

Source:

Photosynthetica | 2002 Volume:40 | Number:1

Harvested from:

CDK

Metadata only:

false