Photosynthetica 2001, 39(1):53-58 | DOI: 10.1023/A:1012487718114

Senescence Retarding Effect of Metal Ions: Pigment and Protein Contents and Photochemical Activities of Detached Primary Leaves of Wheat

D. Subhan1, S.D.S. Murthy1
1 Department of Biochemistry, S.V.University, Tirupati, India

Al3+ significantly delayed the loss of chlorophyll (Chl), protein, and carotenoids when compared to K+ and Mg2+ during dark-induced senescence of detached primary leaves of Triticum aestivum. Thylakoid membranes isolated from Al3+ - treated leaves showed a better retention of photosystem (PS) 2, PS1, and whole chain electron transport activities than thylakoids of K+- or Mg2+-treated leaves. These ions protected the electron transport activities and restored the DCMU-dependent fluorescence increase of thylakoid membranes in a valency-dependent manner. Al3+ also delayed the change of excitation energy distribution during senescence.

Additional key words: aluminium; carotenoids; chlorophyll; DCMU; electron transport; fluorescence emission spectra; leaf senescence; magnesium; potassium

Published: March 1, 2001  Show citation

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Subhan, D., & Murthy, S.D.S. (2001). Senescence Retarding Effect of Metal Ions: Pigment and Protein Contents and Photochemical Activities of Detached Primary Leaves of Wheat. Photosynthetica, 39(1), 53-58. doi: 10.1023/A:1012487718114
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