Effect of excess lead on sunflower growth and photosynthesis
Апстракт
The effect of different lead (Pb) concentrations in the nutrient solution on the growth, Pb and chlorophyll a+b content, chlorophyll fluorescence and quenching parameters in the leaves of young sunflower (Helianthus annuas L.) plants was studied. The content of ph in the analyzed plant parts increased following the increase in Pb content in the nutrient medium. This increase was expressed to a higher extent in the roots than in the stems and leaves. In the presence of high concentration of ph in the leaf area, the dry mass and the height of plants were reduced. Lead treatment of sunflower plants led to a pronounced reduction of chlorophyll (a+b) content, accompanied by much smaller decrease of photosynthetic O-2 evaluation rate and PSII efficiency at low light intensity. Hence, Pb effect did not result in the destruction of the photosynthetic apparatus, but in its reduction. The highest Pb concentration in the nutrient solution induced, however, at saturating photon flux density (PFD) ...a decrease in photochemical quenching and in the efficiency of PSII electron transport and significantly affected nonphotochemical fluorescence quenching, indicating an increase in proton gradient across the thylakoid membrane and a decrease of photophosphorylation.
Извор:
Journal of Plant Nutrition, 1998, 21, 1, 75-85Издавач:
- Philadelphia : Taylor & Francis inc.
Институција/група
Fakultet ekološke poljoprivredeTY - JOUR AU - Kastori, Rudolf AU - Plesnicar, M AU - Sakac, Z AU - Panković, Dejana AU - Arsenijević-Maksimović, I. PY - 1998 UR - https://redun.educons.edu.rs/handle/123456789/24 AB - The effect of different lead (Pb) concentrations in the nutrient solution on the growth, Pb and chlorophyll a+b content, chlorophyll fluorescence and quenching parameters in the leaves of young sunflower (Helianthus annuas L.) plants was studied. The content of ph in the analyzed plant parts increased following the increase in Pb content in the nutrient medium. This increase was expressed to a higher extent in the roots than in the stems and leaves. In the presence of high concentration of ph in the leaf area, the dry mass and the height of plants were reduced. Lead treatment of sunflower plants led to a pronounced reduction of chlorophyll (a+b) content, accompanied by much smaller decrease of photosynthetic O-2 evaluation rate and PSII efficiency at low light intensity. Hence, Pb effect did not result in the destruction of the photosynthetic apparatus, but in its reduction. The highest Pb concentration in the nutrient solution induced, however, at saturating photon flux density (PFD) a decrease in photochemical quenching and in the efficiency of PSII electron transport and significantly affected nonphotochemical fluorescence quenching, indicating an increase in proton gradient across the thylakoid membrane and a decrease of photophosphorylation. PB - Philadelphia : Taylor & Francis inc. T2 - Journal of Plant Nutrition T1 - Effect of excess lead on sunflower growth and photosynthesis EP - 85 IS - 1 SP - 75 VL - 21 UR - conv_677 ER -
@article{ author = "Kastori, Rudolf and Plesnicar, M and Sakac, Z and Panković, Dejana and Arsenijević-Maksimović, I.", year = "1998", abstract = "The effect of different lead (Pb) concentrations in the nutrient solution on the growth, Pb and chlorophyll a+b content, chlorophyll fluorescence and quenching parameters in the leaves of young sunflower (Helianthus annuas L.) plants was studied. The content of ph in the analyzed plant parts increased following the increase in Pb content in the nutrient medium. This increase was expressed to a higher extent in the roots than in the stems and leaves. In the presence of high concentration of ph in the leaf area, the dry mass and the height of plants were reduced. Lead treatment of sunflower plants led to a pronounced reduction of chlorophyll (a+b) content, accompanied by much smaller decrease of photosynthetic O-2 evaluation rate and PSII efficiency at low light intensity. Hence, Pb effect did not result in the destruction of the photosynthetic apparatus, but in its reduction. The highest Pb concentration in the nutrient solution induced, however, at saturating photon flux density (PFD) a decrease in photochemical quenching and in the efficiency of PSII electron transport and significantly affected nonphotochemical fluorescence quenching, indicating an increase in proton gradient across the thylakoid membrane and a decrease of photophosphorylation.", publisher = "Philadelphia : Taylor & Francis inc.", journal = "Journal of Plant Nutrition", title = "Effect of excess lead on sunflower growth and photosynthesis", pages = "85-75", number = "1", volume = "21", url = "conv_677" }
Kastori, R., Plesnicar, M., Sakac, Z., Panković, D.,& Arsenijević-Maksimović, I.. (1998). Effect of excess lead on sunflower growth and photosynthesis. in Journal of Plant Nutrition Philadelphia : Taylor & Francis inc.., 21(1), 75-85. conv_677
Kastori R, Plesnicar M, Sakac Z, Panković D, Arsenijević-Maksimović I. Effect of excess lead on sunflower growth and photosynthesis. in Journal of Plant Nutrition. 1998;21(1):75-85. conv_677 .
Kastori, Rudolf, Plesnicar, M, Sakac, Z, Panković, Dejana, Arsenijević-Maksimović, I., "Effect of excess lead on sunflower growth and photosynthesis" in Journal of Plant Nutrition, 21, no. 1 (1998):75-85, conv_677 .