生态美城 物流大市 国际稻都——怀化市城市形象构思浅探     

瞿琼  瞿春林 《怀化师专学报》2009,(3):24-25

城市已成为现代化进程的主体和先锋。城市形象定位准确而又特色鲜明,将大大提高城市美誉度和城市竞争力,推动经济社会又好又快发展。怀化城市建设三十多年,取得了令人瞩目的成绩,但究竟以一个什么样的形象屹立于世人心中,依据城市建设现代化要求和怀化的突出特色,认为怀化城市形象应该是：生态荚城、物流大市、国际稻都。  相似文献   

Identification and expression analysis of OsHsfs in rice     

Chuang WANG  Qian ZHANG  Hui-xia SHOU 《Journal of Zhejiang University. Science. B》2009,10(4)

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Molecular characterization of a defense-related AMP-binding protein gene, OsBIABP1, from rice     

Xin-chun Zhang  Xin Yu  Hui-juan Zhang  Feng-ming Song 《Journal of Zhejiang University. Science. B》2009,10(10):731-739

We cloned and characterized a rice gene OsBIABPI encoding an AMP-binding protein. The full-length cDNA of OsBIABP1 is 1912-bp long and is predicted to encode a 558-aa protein. OsBIABP1 contains a typical AMP-binding signature motif and shows high similarity to members of AMP-binding protein family. OsBIABP1 is expressed in stems, leaves and flowers of rice plants, but is not expressed, or expressed at a very low level, in rice roots. The expression of OsBIABP1 was induced by some defense-related signal molecules, e.g., salicylic acid (SA), benzothiadiazole, jasmonic acid (JA), and 1-amino cyclopropane-1-carboxylic acid, which mediate SA-and JA/ethylene (ET)-dependent defense signaling pathways, respectively. Furthermore, the expression of OsBIABP1 is activated by the infection of Magnaporthe oryzae, and the induced expression is quicker and stronger during early stages of pathogenesis in incompatible interaction than that in compatible interaction between rice and M. oryzae. Our results suggest that OsBIABP1 may be a defense-related AMP-binding protein that is involved in the regulation of defense re-sponse through SA and/or JA/ET signaling pathways.  相似文献   

水杨酸对水稻幼苗硝酸还原酶活性和根系生长的影响     

高夕全  刘爱荣  叶梅荣  段胜利 《安徽科技学院学报》2000,(1)

用 5 0mg/L水杨酸 (SA)浸种处理后 ,水稻根系生长受到明显促进。幼苗经 5 0mg/LSA诱导处理 2 4h后 ,体内的硝酸还原酶活性 (NRA)显著增强。与此相一致的是 ,5 0mg/LSA处理不仅能提高幼苗内源细胞分裂素和生长素的水平 ,还可以降低脱落酸的含量。提示SA对硝酸还原酶活性的诱导作用可能是通过调节内源激素的水平来实现的。  相似文献   

公众对转基因水稻大豆的接受度及影响因素对比研究     

陈璇  陈洁  孙涛 《科技管理研究》2017,(12)

基于中国粮食安全与食品安全现实情境,结合社会系统论和风险社会理论引入系统信任、风险/收益感知、科技观、传播媒介等系列变量,对重庆、湖北、浙江三省市城镇居民进行问卷调查,分析调查数据比较国内研发的转基因水稻和进口转基因大豆的公众接受度及影响因素。研究发现,公众对转基因水稻的接受度比转基因大豆的接受度高,受到更多风险感知等结构因素的显著影响。信任国内转基因研发机构、转基因技术保障粮食安全的收益感知是对这两种转基因作物与食品的公众接受度都有正向显著影响的关键因素。比较研究结果表明,中国的转基因风险管理要聚焦粮食安全保障、专家系统的信任机制建设和科技观引导。  相似文献   

红壤丘陵地区双季稻光合特性初步研究   总被引：3，自引：0，他引：3  

刘允芬于贵瑞李家永宋霞 《资源科学》2001,23(6):49-53

亚热带红壤丘陵地区水稻叶片净光合速率与蒸腾速率在夏季晴天中午有降低现象，其日变化曲线呈双峰型。PAR和温度的日变化是形成光合速率日变化的主要环境因子。较高的温度会导致蒸腾强度降低，而水分亏缺引起的气孔导度降低气孔阻力增大则造成光合速率的降低。水稻上部叶片的光补偿点低于下部叶片，而光饱和点则是下部叶片低于上部。表观初始光能利用效率第2片叶为0.049-0.068，第4片叶为0.044-0.060。光能利用率第2片叶在2.6%-5.7%，第4片叶在2.0%-5.8%。水稻叶片的最大光合速率早稻和晚稻旗叶、2叶、4叶分别可达到19.58μmol CO2m-2、17.78μmol CO2m-2、14.4μmol CO2m-2 s-1和26.46和17.27μmol CO2m-2 s-1  相似文献   

云南省水稻矮缩病毒S10片段的序列分析     

张磊  董家红  朱勇  张仲凯 《昆明师范高等专科学校学报》2010,(6):87-88,91

用RT？PCR方法从云南省寻甸、嵩明、通海、芒市、沾益和陆良6个地区的水稻样品中扩增到水稻矮缩病毒S10片段部分序列,核苷酸测定及序列分析表明,6个地区水稻矮缩病毒分离物S10片段部分序列长度均为1 071个核苷酸,含1个1 059个核苷酸的ORF,编码352个氨基酸.云南分离物S10片段之间的核苷酸同源性约为97.9%~99.9%,其编码的氨基酸同源性为97.7%~100%;云南分离物与日本分离物的S10片段核苷酸同源性和氨基酸相似性分别为94.1%~95.4%和96.3%~99.2%,与中国分离物的S10片段核苷酸同源性和氨基酸相似性分别为94.8%~96.6%和95.2%~96.6%.云南分离物在亲缘关系上与日本分离物较中国分离物近.  相似文献   

芜湖米市的兴起及其与李鸿章的关系     

陈敬宇  郭洪业 《安徽师范大学学报(人文社会科学版)》2006,34(5):575-578

芜湖米市在开埠通商条件下得到快速的发展,其根本原因在于芜湖本身所具有的市场条件、交通条件和富饶的稻米生产基础。李鸿章力将七浩口米市迁芜,其家族势力的庞大,尤其是广潮商帮到芜,带来了资金和市场,对芜湖米市迅速崛起起到了催化作用。  相似文献   

Genotypic and environmental variation in cadmium, chromium, arsenic, nickel, and lead concentrations in rice grains   总被引：1，自引：0，他引：1  

Cheng WD  Zhang GP  Yao HG  Wu W  Xu M 《Journal of Zhejiang University. Science. B》2006,7(7):565-571

Genotypic and environmental variation in Cd, Cr, As, Ni and Pb concentrations of grains, and the relationships between these heavy metals and Fe, Zn were investigated using 9 rice genotypes grown in 6 locations for two successive years. Significant genotypic variation was detected in the five heavy metal concentrations in grains, indicating the possibility to reduce the concentration of these heavy metals in grains through breeding approach. The environmental effect varied with metal, with Pb and Ni having greater variation than the other three metals. There was significant genotype-environment （location） interaction of the concentrations of all five heavy metals in grains, suggesting the importance of cultivar choice in producing rice with low heavy metal concentrations in grains for a given location. Correlation analysis showed that Cd and As, Cr and Ni, and As and Pb concentrations in rice grains were closely associated, and that Ni concentration in grains was negatively correlated with Zn concentration.  相似文献