芘胁迫对玉米幼苗生长及生理指标的影响(英文)

来源 :Agricultural Science & Technology | 被引量 : 0次 | 上传用户:howard2000_0
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
[目的]探讨芘胁迫对玉米幼苗生长及生理指标的影响。[方法]通过水培试验,研究了4个浓度(0、0.5、1.0和2.0mg/L)的芘对2种玉米市祥1号(敏感品种)和广甜3号(耐性品种)幼苗生长及生理指标的影响。[结果]在试验浓度范围内,随芘浓度的升高,市祥1号叶绿素a和叶绿素b含量呈先升高后降低的趋势,相对生长量和绝对生长速率呈下降趋势,根系和叶片丙二醛(MDA)含量呈上升趋势;广甜3号相对生长量、绝对生长速率和叶绿素a含量呈先上升后下降趋势,叶绿素b和根系MDA含量呈上升趋势,叶片MDA含量呈下降趋势。与对照相比,市祥1号在0.5~1.0mg/L芘处理时叶绿素a和叶绿素b含量显著增加,芘浓度≥2.0mg/L时则显著降低,芘浓度≥1.0mg/L时根系和叶片MDA含量显著增加,而相对生长量和绝对生长速率显著降低;广甜3号在芘浓度≥1.0mg/L时叶绿素a和叶绿素b含量显著增加。芘浓度与敏感品种市祥1号的相对生长量和绝对生长速率呈显著负相关,与根系MDA含量呈显著正相关;芘浓度与耐性品种广甜3号叶绿素b含量和根系MDA含量呈显著正相关。[结论]为玉米苗期的管理措施提供了依据。 [Objective] The research aimed to discuss the effect of pyrene stress on the growth and physiological index of corn seedling. [Method] Four hydroponic experiments were conducted to study the effects of pyrene at four concentrations (0, 0.5, 1.0 and 2.0 mg / L) on the seedling growth of two maize Xiang 1 and susceptible varieties. And physiological indicators. [Result] With the increase of pyrene concentration, the contents of chlorophyll a and chlorophyll b in Chengxiang 1 increased at first and then decreased with the increase of pyrene concentration. The relative growth rate and absolute growth rate decreased with the increase of pyrene concentration. The root and leaf C MDA content increased; the relative growth, absolute growth rate and chlorophyll a content of Guangtian No.3 increased at first and then decreased, the MDA content of chlorophyll b and roots increased and the MDA content of leaves decreased. Compared with the control, the content of chlorophyll a and chlorophyll b in Xiangxiang 1 increased significantly when pyrene was treated with 0.5-1.0 mg / L pyrene, and decreased significantly when pyrene concentration was 2.0 mg / L or higher. When pyrene concentration was greater than or equal to 1.0 mg / L, The MDA content of leaves increased significantly, while the relative growth rate and absolute growth rate decreased significantly. The content of chlorophyll a and chlorophyll b of Guangtian No.3 was significantly increased when the pyrene concentration was above 1.0 mg / L. There was a significant negative correlation between pyrene concentration and relative growth rate and absolute growth rate of the susceptible cultivar “Cheung 1” and a significant positive correlation with MDA content in the root system. The pyrene concentration and the content of chlorophyll b and MDA in the root of the resistant cultivar Guangtian 3 were significantly positive Related. [Conclusion] This provided the basis for maize seedling management measures.
其他文献
学位
犯罪不仅威胁到广大人民的生命财产安全,也给社会稳定带来隐患。学者已经在犯罪领域开展了大量的研究,以期为公安部门的工作提供决策支持和实际指导。犯罪地理学是犯罪研究的一
我国面临未富先老,支撑老龄化需求的基础较为薄弱.同时老龄化产业的发展处于起步阶段,老龄化产业发展的质量、水平、标准化程度还处于较低层次,整个产业尚未在国民经济中形成
10月28日,上海黄金交易所(以下简称“金交所”)与迪拜黄金与商品交易所在上海签署了《上海金基准价授权使用协议》。在阿联酋经济部副部长Abdullah Bin Ahmed Al Saleh先生,
从掮客、买办到十三行,展现了清末民初牙商的近现代蜕变。清末民初关于经纪行为的民事习惯法:因地制宜的规矩。纵观中国经纪人行业的形成与发展流变的历史轨迹,尤其是近现代
内地朋友从来都不请我吃海鲜,他们总是说:“你从香港来,就别吃海鲜了吧。”似乎在所有中国人的心目中,香港都该是个吃海鲜的胜地。一来粤菜清淡,很适合捕捉海鲜真味;二来她是个知名海港,正所谓靠海吃海,香港的海鲜要是不好,那就是怪事了。  于是朋友们来到香港,我就好像理所当然地要请他们吃海鲜了。有一回,舅舅和表弟父子两人过来玩,我特意带他们去西贡市区。先沿码头那条路吹吹风,再看看沿街饭馆的盛况,以助食欲。
期刊
进入21世纪以来,因自然灾害尤其是地质灾害造成人员伤亡及财产损失事件越来越频繁,所以人类要从科学的意义上认识这些灾害的发生、发展以尽可能减小它们所造成的危害,这已是国际
“绿道”一词自我国珠江三角洲区域绿道规划建设以来便越来越频繁的出现在大众的视野。事实上,绿道早在一个世纪以前便已出现,又因其突出的生态功能、休闲游憩功能、交通功能、
鉴于MT710报文类型的特殊性,如何建立切实可行的风控机制,加强对转递信用证真实性及贸易背景的审核,尤其值得我们关注。案情经过2015年6月10日,交单行/通知行D银行(中国)收到
针对苹果树腐烂病在甘肃省庄浪县苹果生产区的发生和蔓延,已严重制约和影响全县果园的果品生产和发展,部分地段园区苹果树腐烂病发生极为严重,给果农带来了极大的经济损失。