J Integr Plant Biol. ›› 1997, Vol. 39 ›› Issue (11): -.

• Research Articles •    

Photosynthetic Characteristics of an Albino Mutant (zb/zb) in Maize

Zhao Qi, Tang Chong-qin and Kuang Ting-yun   

Abstract: Crossed the zb/zb with the normal maize, Zea mays L., the Fl was zb/zb genotype. The development of thylakoid membranes of the albino maize (zb/zb) was inhibited at its initial stage. The content of Chi-protein complexes decreased evidently. The absorption of light energy was only 43 % and the potential activity of PS Ⅱ was 18.5 % in the albino maize chloroplasts as compared with the normal maize. The conversion efficiency of primary light energy of PS Ⅱ of the albino chloroplasts was 36.1% of the normal. The fluorescence intensity at 77 K in the albino maize chloroplasts was declined. These results proved that the constructive process of thylakoid lamellae was disturbed by the albino gene zb/zb. The Chi-protein complexes and the grana lamella, in the incomplete membrane of the albino maize were deficient, although its PS Ⅰ developed completely. It can be deduced that the potential activity and the conversion efficiency of the primary light energy of PS Ⅱ in the albino maize was lower than those in the control, perhaps, it is due to the incomplete development of the Chiprotein complexes and the electron transport chains.

Key words: Maize mutant, Chloroplast, Activity of PS Ⅱ , Conversion efficiency of primary light energy of PS Ⅱ , Excitation energy distribution

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