|
|
|
|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
|
|

| | NaCl-tolerant lines of 'Jincheng' and 'Taoyecheng' (Citrus sinensis) were obtained by subjecting their nucellar calli to γ ray and EMS, and 10 generations of selection in vitro. Later tests confirmed that their tolerance was stable. The tolerant lines accumulated more proline, maintained higher level of K~+ , and absorbed less Cl~- and Na~+ than the original calli. The protoplasts from the tolerant lines developed embryoids after 2 months culture, and they germinated into plantlets. Besides, it was found th... | | 本研究用γ射线、EMS诱变,NaCl直接选择10代,获得‘锦橙’、‘桃叶橙’耐盐突变系。耐盐系在无盐胁迫下培养3代,经原生质体分离、培养后再回到盐胁迫下,存活率和生长都正常,这说明耐盐系是稳定的。耐盐系能积累更多的游离脯氨酸,维持较高水平的K~+,吸收较少的Cl~-和Na~+。这很可能是耐盐系耐盐的生理基础。从耐盐系珠心愈伤组织分离原生质体,培养2个月后形成胚状体,胚状体进一步萌发成耐盐原生质体植株。 | | 文摘来源 | | Under salt stress, the free proline, the cell wall hydroxyproline and the cell surface glycoprotein content of seedling leaf of wheat varieties which are different in salt tolerance were determined. The glycoproteins at the surface of cell wall were also observed by electron microscopy. It was found that the level of cell wall hydroxyproline and glycoprotein of seedlings of salt tolerant varieties (R 017, R 025, 961 and Lude 1) was significantly higher than that of salt susceptible varieties (Chinese Spri... | | 小麦盐胁迫处理后发现,强耐盐品种(961、R-025、鲁德1号和R-017)细胞壁结合的羟脯氨酸及糖蛋白合成显著高于盐敏感品种(东103和中国春);品种间的游离脯氨酸含量与其耐盐性关系不明显。电镜观察结果表明:盐胁迫过程中强耐盐品种其细胞表面糖蛋白层明显增厚、致密,而盐敏感品种则变薄、脱落甚至完全消失,游离到细胞间隙中。细胞壁糖蛋白的积累是小麦品种耐盐性反应的重要生化机制,在小麦的耐盐生理活动中起着重要作用。 | | 文摘来源 | | Brief history and up dated advance of improvement and utilization of saline alkali soil in the world are introduced in the thesis.It is a effective way to improve saline alkali soil that water and fertilizer control is the focus in combinationof engineering measure,agricultural measures and biological measures.Moreover,there are new ways to improve saline alkali soil such as salt water irrigation,chemical methods,introduction of salt tolerance plants.Nowadays the reseach of saline alkali soli improvi... | | 该文简要回顾了盐碱地改良利用研究的历史,介绍了当前国际上开展此项研究的最新进展情况。以水肥为中心,工程措施、农业措施、生物措施相互结合,是改良盐碱地的有效途径;盐水灌溉、采用新的化学改良方法、引种耐盐植物等是盐碱地改良利用的新措施;耐盐生理研究的进步,促进了耐盐品种的选育工作,加快了盐碱地改良利用的步伐 | | 文摘来源 | |   | | << 更多相关文摘 |
|
相关查询: | |
对查询结果不满意
|
|
|
|