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| 1 | GRAIN INCOMPLETE FILLING 2 regulates grain filling and starch synthesis during rice caryopsis development显示文摘Rice grain filling determines grain weight,final yield and grain quality.Here,a rice defective grain filling mutant,gif2,was identified.Grains of gif2 showed a slower filling rate and a significant lower final grain weight and yield compared to wild-type.The starch content in gif2 was noticeably decreased and its physicochemical properties were also altered.Moreover,gif2 endosperm cells showed obvious defects in compound granule formation.Positional cloning identified GIF2 to encode an ADP-glucose pyrophosphorylase(AGP) large subunit,AGPL2;consequently,AGP enzyme activity in gif2 endosperms was remarkably decreased.GIF2 is mainly expressed in developing grains and the coded protein localizes in the cytosol.Yeast two hybrid assay showed that GIF2 interacted with AGP small subunits Os AGPS1,Os AGPS2a and Os AGPS2 b.Transcript levels for granule-bound starch synthase,starch synthase,starch branching enzyme and starch debranching enzyme were distinctly elevated in gif2 grains.In addition,the level of nucleotide diversity of the GIF2 locus was extremely low in both cultivated and wild rice.All of these results suggest that GIF2 plays important roles in the regulation of grain filling and starch biosynthesis during caryopsis development,and that it has been preserved during selection throughout domestication of modern rice. | Xiangjin Wei Guiai Jiao Haiyan Lin Zhonghua Sheng Gaoneng Shao Lihong Xie Shaoqing Tang Qingguo Xu Peisong Hu | 2017 | Journal of Integrative Plant Biology2017，59，2： | 20 |
| 2 | Estimation of carbon sinks in chemical weathering in a humid subtropical mountainous basin显示文摘The fluvial geochemistry of the mainstream and tributaries of the Zengjiang River was investigated,and the mass balance approach and deduction methods were used to estimate the uptake of atmospheric CO2 through rock chemical weathering.The results showed that the chemical runoff mainly consisted of HCO3-,Ca2+,Na+,and dissolved Si,and that silicate mineral weathering was significant,but carbonate mineral weathering was a minor source of dissolved loads in the Zengjiang River basin because of the low amount of interlayered carbonate rock strata in the catchment.The ion composition indicated that atmospheric CO2 was the primary erosive agent for rock chemical weathering in the Zengjiang River basin.The CO2 consumption fluxes caused by rock chemical weathering were(3.50-3.81) × 105 mol km-2 a-1,which is just lower than that in tropical and subtropical basalt and carbonate regions,and is much higher than that in temperate and cold-temperate regions,indicating that surficial chemical weathering processes in the humid and hot monsoon current influencing the low-middle latitude zone of the Northern Hemisphere constitutes a significant carbon sink in the global biogeochemical cycle. | TAO Zhen GAO QuanZhou WANG ZhenGang ZHANG ShengHua XIE ChenJi LIN PeiSong RUAN XiaoBing LI ShuHong MAO HaiRuo | 2011 | Chinese Science Bulletin2011，56，35： | 15 |
| 3 | Effect of RE-Nb on the strength and toughness of 3Cr2MoNiWV cast hot working die steel 显示文摘 | Yan Peisong Xie Minmao Wen Yanwang Guo Lin | 2006 | Journal of Materials Science2006，32，7： | 1 |
| 4 | Magnetic circular dichroism of photosystem Ⅱ reaction center complex显示文摘IN recent years,magnetic circular dichroism(MCD)demonstrated its unique advantages inanalysis of metal porphyrin and its interaction with protein.However,there were few re-ports about the application of MCD method in photosynthesis field.It is known that most pig-ments in PS Ⅱ-RC are metal porphyrin type.This note reports the MCD spectrum of PS Ⅱ- | YANG Kunyun, TANG Chongqin, KUANG Tingyun, TANG Peisong, SHEN Ziwei, LIN Wei, ZHANG Xiufang and ZHAO Nanming1 Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China 2. State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsmghua University, Beijing 100084, China | 1997 | Chinese Science Bulletin1997，42，9： | 1 |
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