[Objective] The aim of the present study was to investigate the characteristics of calcium （Ca）, magnesium （Mg） and iron （Fe） subcellular distributions in oilseed rape （Brassica napus L.） leaves during cold ac...[Objective] The aim of the present study was to investigate the characteristics of calcium （Ca）, magnesium （Mg） and iron （Fe） subcellular distributions in oilseed rape （Brassica napus L.） leaves during cold acclimatization. [Method] A field experiment was conducted at two contrasting environments with three replicates and included a freezing sensitive variety （cv. Zhongshuang No. 11, ZS） and a freezing tolerant variety （cv. Ganyouza No. 1, GY）. [Result] The concentrations of Ca, Mg and Fe were significantly increased in plants roots, and the concentrations of Ca and Mg were significantly decreased but the Fe concentration was significantly increased in plants shoots. In leaves, the Ca concentration stored in soluble fraction was significantly increased and the Ca concentration of organelle-contained fraction and cell wall-associated fraction were significantly decreased with experiment time. The Mg concentrations stored in soluble fraction, organelle-contained fraction and cell wall-associated fraction were decreased with time. In contrary, the Fe concentration stored in soluble fraction, organelle-contained fraction and cell wall associated-fraction was significantly increased with time. Meanwhile, the changes of these measures of ZS were much higher than those of GY during cold acclimatization, which might be due to the GY is a freezing tolerant variety but ZS is not. [Conclusion] These results suggested that increasing the concentrations of Ca, Mg and Fe in plants shoots might increase the cold resistance of oilseed rape.展开更多
Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and ...Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution. On the basis of the research of core analyses, well logging data analyses, sedimentary facies analyses and seismic reflection structure analyses, the authors have concluded the sedimentary characteristics of Eyl, and have carried out Eyl sedimentary environments and its origin. The result shows that Eyl desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.展开更多
基金Supported by the Special Funds of Public Welfare Institutes of China(1610172011016)the Special Funds for Public Welfare Industry(Agriculture)Study of China(200903003)~~
文摘[Objective] The aim of the present study was to investigate the characteristics of calcium （Ca）, magnesium （Mg） and iron （Fe） subcellular distributions in oilseed rape （Brassica napus L.） leaves during cold acclimatization. [Method] A field experiment was conducted at two contrasting environments with three replicates and included a freezing sensitive variety （cv. Zhongshuang No. 11, ZS） and a freezing tolerant variety （cv. Ganyouza No. 1, GY）. [Result] The concentrations of Ca, Mg and Fe were significantly increased in plants roots, and the concentrations of Ca and Mg were significantly decreased but the Fe concentration was significantly increased in plants shoots. In leaves, the Ca concentration stored in soluble fraction was significantly increased and the Ca concentration of organelle-contained fraction and cell wall-associated fraction were significantly decreased with experiment time. The Mg concentrations stored in soluble fraction, organelle-contained fraction and cell wall-associated fraction were decreased with time. In contrary, the Fe concentration stored in soluble fraction, organelle-contained fraction and cell wall associated-fraction was significantly increased with time. Meanwhile, the changes of these measures of ZS were much higher than those of GY during cold acclimatization, which might be due to the GY is a freezing tolerant variety but ZS is not. [Conclusion] These results suggested that increasing the concentrations of Ca, Mg and Fe in plants shoots might increase the cold resistance of oilseed rape.
文摘Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution. On the basis of the research of core analyses, well logging data analyses, sedimentary facies analyses and seismic reflection structure analyses, the authors have concluded the sedimentary characteristics of Eyl, and have carried out Eyl sedimentary environments and its origin. The result shows that Eyl desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.
