Chlorophyll content and photosystem II efficiency in soybean exposed to supplemental ultraviolet-B radiation

Title:

Chlorophyll content and photosystem II efficiency in soybean exposed to supplemental ultraviolet-B radiation

Creator:

Hu, Z., Li, H., Chen, S., and Yang, Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a2f5bab8-e182-4385-b5e5-c5d7ec8815d8
uuid:a2f5bab8-e182-4385-b5e5-c5d7ec8815d8
issn:0300-3604
doi:10.1007/s11099-013-0007-4

Subject:

botanika, botany, chlorophyll content, fluorescence quenching, Glycine max, rapid light curves, ultraviolet-B radiation, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Chlorophyll (Chl) a fluorescence parameters and rapid light curves of soybean [Glycine max (L.) Merrill] were measured by pulse amplitude modulation fluorometry. Measurements were taken during different stages of soybean growth under field conditions with 20% enhancement in ultraviolet-B (UV-B) radiation. Results showed that supplemental UV-B radiation decreased Chl contents by 5.5% (P=0.048), 8.7% (P=0.046), and 10.5% (P=0.005) in seedling, in branching-flowering, and in pod-setting stages, respectively. In the branching-flowering and pod-setting stages, maximum quantum yield of photosystem (PS) II photochemistry (Fv/Fm) decreased by 6.1% (P=0.001) and 3.0% (P=0.009), respectively. Supplemental UV-B radiation significantly decreased the effective quantum yield (Y). The photosynthetic capacity at light saturation (Pm) also decreased in both the seedling and branching-flowering stages by 28.9% (P=0.007) and 15.5% (P=0.041), respectively. However, Y and Pm showed no significant difference in the trefoil and pod-setting stages with and without the UV treatment. The light saturation parameter (E k) decreased by 21.1% (P=0.000) and 23.2% (P=0.029) in the trefoil and seedling stages, respectively. Moreover, the initial slope (α) decreased by 21.1% (P=0.001) in the branching-flowering stage. Nonphotochemical quenching (NPQ) in the seedling stage and photochemical quenching coefficient (qp) in the branching-flowering stage decreased significantly under UV-B treatments. The results of the present study suggest that supplemental UV-B radiation adversely affected Chl content and electron transport activity in PSII and consequently decreased the photosynthetic efficiency of soybean plants., Z. Hu ... [et al.]., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

151-157

Source:

Photosynthetica | 2013 Volume:51 | Number:1

Harvested from:

CDK

Metadata only:

false