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Physiological and proteome studies of maize (Zea mays L.) in response to leaf removal under high plant density

Under high plant density, intensifying competition among individual plants led to overconsumption of energy and nutrients and resulted in an almost dark condition in the lower strata of the canopy, which suppressed the photosynthetic potential of the shaded leaves. Leaf removal could help to ameliorate this problem and increase crop yields. | Nội dung Text Physiological and proteome studies of maize Zea mays L. in response to leaf removal under high plant density .den color inherit .ttnd ol .ttnd ul .ttnd dl padding 0 0px 0 20px .ttnd hr margin 10px 0px .ttnd a href javascript void 0 .ttnd a href color inherit dtextscript p text-align left dtextscript img vertical-align middle Wei et al. BMC Plant Biology 2018 18 378 lt br gt https doi.org 10.1186 s12870-018-1607-8 lt br gt lt br gt lt br gt lt br gt lt br gt RESEARCH ARTICLE Open Access lt br gt lt br gt Physiological and proteome studies of lt br gt maize Zea mays L. in response to leaf lt br gt removal under high plant density lt br gt Shanshan Wei1 2 Xiangyu Wang2 3 Dong Jiang1 and Shuting Dong2 lt br gt lt br gt lt br gt Abstract lt br gt Background Under high plant density intensifying competition among individual plants led to overconsumption lt br gt of energy and nutrients and resulted in an almost dark condition in the lower strata of the canopy which lt br gt suppressed the photosynthetic potential of the shaded leaves. Leaf removal could help to ameliorate this problem lt br gt and increase crop yields. To reveal the mechanism of leaf removal in maize tandem mass tags label-based lt br gt quantitative analysis coupled with liquid chromatography tandem mass spectrometry were used to capture the lt br gt differential protein expression profiles of maize subjected to the removal of the two uppermost leaves S2 the four lt br gt uppermost leaves S4 and with no leaf removal as control S0 . lt br gt Results Excising leaves strengthened the light transmission rate of the canopy and increased the content of lt br gt malondialdehyde whereas decreased the activities of superoxide dismutase and peroxidase. Two leaves removal lt br gt increased the photosynthetic capacity of ear leaves and the grain yield significantly whereas S4 decreased the yield lt br gt markedly. Besides 239 up-accumulated proteins and 99 down-accumulated proteins were identified .