Lead-induced toxicity and interference in chlorophyll fluorescence in Talinum triangulare grown hydroponically

Title:

Lead-induced toxicity and interference in chlorophyll fluorescence in Talinum triangulare grown hydroponically

Creator:

Kumar, A. and Prasad, Majeti Narasimha Vara

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:51e8decf-3348-472c-951a-b56f911ccf0f
uuid:51e8decf-3348-472c-951a-b56f911ccf0f
issn:0300-3604
doi:10.1007/s11099-015-0091-8

Subject:

photosynthesis, Indie, India, ceylon spinach, chlorophyll fluorescence, electron transport rate, photosystems, lead, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

We investigated the lead (Pb) effect on chlorophyll (Chl) fluorescence and photosynthetic electron transport system in Talinum triangulare (Jacq.) Willd. Plants were exposed to different concentrations of Pb(NO3)2 (i.e. 0, 0.25, 0.5, 0.75, 1.0, and 1.25 mM) for seven days in hydroponic experiments. Pb-treated leaves exhibited a relative decrease in Chl fluorescence induction curve, which resulted in the decrease of maximal fluorescence yield, maximal quantum yield, and effective quantum yield of PSII, while nonphotochemical quenching, quantum yield of regulated and nonregulated energy dissipation of PSII significantly increased during Pb stress. Furthermore, Pb concentrations also caused a decrease in maximal P700 change, photochemical quantum yield, nonphotochemical quantum yield, and ETR of PSI. We suggested that the changes in these parameters were a manifestation of Pb interference in the electron transport chain in both PSII and PSI. The sensitivity of PSII was greater than that of PSI in T. triangulare leaves., A. Kumar, M. N. V. Prasad., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

66-71

Source:

Photosynthetica | 2015 Volume:53 | Number:1

Harvested from:

CDK

Metadata only:

false