Ultrastructural and photosynthetic response of Populus 107 leaves to cadmium stress

• Autorzy: Ge W. , Jiao Y. , Zou J. , Jiang W. , Liu D.
• Języki publikacji: EN

Abstrakty

EN

As Populus 107 is an efficient phytoextraction plant, it was used in the present investigation in order to better understand the mechanisms of detoxification and tolerance of Cd. Cd-induced impacts on photosynthetic parameters (chlorophyll content, soluble protein, and chlorophyll fluorescence) and ultrastructural changes in leaves of Populus 107 exposed to 50 μM, 100 μM, and 500 μM for 40 days were carried out. The results showed that in the Cd-treated cells, almost all the chloroplasts seemed to be affected. Cd induced several significant ultrastructural changes, including swollen chloroplast thylakoids, dissolved thylakoid grana, disintegrated chloroplasts, and numerous plastoglobuli in chloroplasts. Data from chlorophyll fluorescence showed that Fv/Fm, Fv ’/Fm’, ΦPSII, ETR, and qP decreased while qN increased in leaves of Populus 107 exposed to Cd when compared to control. The content of soluble protein increased with increasing Cd concentration and declined with prolonged duration of treatment. The soluble protein content in leaves treated with 50 μM Cd reached the maximum, which was 14.29% more than that of control. The content in leaves exposed to 500 μM Cd were only 61.76% of control. At the end of the experiment the contents of chlorophyll a, b, and a+b of Populus 107 treated with 500 μM Cd decreased to the minimum, which were 47.69%, 37.10%, and 45.49% of control, and respectively, and significantly (P < 0.05) lower than control. The toxic mechanisms of Cd are briefly explained.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2015
• Tom: 24
• Numer: 2
• Opis fizyczny: p.519-527,fig.,ref.

Twórcy

autor

Ge W.

• Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
• Key Laboratory of Bamboo and Rattan Science and Technology of the State Forestry Administration, International Centre for Bamboo and Rattan, Beijing 100102, China

autor

Jiao Y.

• Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
• Tianjin No.7 Junior and Senior High School, Tianjin 300160, China

autor

Zou J.

• Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China

autor

Jiang W.

• Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China

autor

Liu D.

• Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China

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Identyfikatory

DOI

10.15244/pjoes/27814