Influences of calcium deficiency and cerium on the conversion efficiency of light energy of spinach

Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
Hao HuangFashui Hong

Abstract

Chloroplast absorbs light energy and transforms it into electron energy, and then converts it into active chemical energy and stable chemical energy. In the present paper, we investigated the effects of Ce(3+), which has the most significant catalytic effects and similar characteristics with Ca(2+), on light energy conversion of spinach chloroplasts under Ca(2+)-deficient stress. The results illuminated that the Hill reaction activity, electron flow both photosystems and photophosphorylation rate of spinach chloroplasts reduced significantly under Ca(2+)-deficient condition, and activities of Mg(2+)-ATPase and Ca(2+)-ATPase on the thylakoid membrane were severely inhibited. Meanwhile, the activity of Rubisco, which is the key enzyme of photosynthetic carbon assimilation, was also prohibited. However, Ce(3+) decreased the inhibition of calcium deprivation the electron transport rate, the oxygen evolution rate, the cyclic and noncyclic photophosphorylation, the activities of Mg(2+)-ATPase, Ca(2+)-ATPase and Rubisco of spinach chloroplasts. All above implied that Ca(2+)-depletion could disturb light energy conversion of chloroplasts strongly, which could be reversed by Ce(3+).

Citations

Apr 28, 2009·Biological Trace Element Research·Na LiFashui Hong
May 7, 2009·Biological Trace Element Research·Sitao YinFashui Hong
Jun 11, 2011·Biological Trace Element Research·Xiaolan GongFashui Hong
Oct 8, 2011·Biological Trace Element Research·Chunxiang QuFashui Hong
May 8, 2009·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Yuguan ZeFashui Hong
Apr 2, 2017·The Science of the Total Environment·Filip PošćićLuca Marchiol
Aug 5, 2017·Nanoscale Research Letters·Xiaochuan JiaLi Sun
Apr 1, 2009·Plant Science : an International Journal of Experimental Plant Biology·Chunfang ZhengWeixing Cao

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