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
The article introduces a contemporary and highly controversial Indian politician, Narendra Modi, who appears to have had a tremendous impact on the political culture of India. It provides a brief account of his life, identifies the greatest achievements of his governance in the Indian state of Gujarat, and thereafter, references the most sensitive issues conncted with his existing political mission, as well as his personality traits. Since the article is written some months ahead of the upcoming elections to the Lok Sabha, the Indian parliament, Modi is presented here as a front runner for the post of prime minister., Zdeněk Štipl., and Obsahuje seznam literatury