华北农学报Issue(4)：139-144,6.
低温处理对精量穴直播水稻幼苗生长特性的影响
Effects of Low Temperature on Growth Characteristics of Rice Seedlings in Precision Hill-drop Drilling Rice
摘要
Abstract
Cold stress is a significant problem for rice production in temperate or tropical regions ,which often result in poor stand establishment ,delayed growth ,and non-uniform maturation .Choosing rice seedling with cold tol-erance earlier and accurately is especially important in rice production systems , which are becoming more wide-spread .To elucidate the growth characteristics of precision hill-drop drilling rice at seedling stage under low temper-ature stress,a pot experiment was conducted using super hybrid rice variety ,Peizataifeng,cultivated in light incuba-tor under five different temperature treatments .The five temperature treatments were 9 ,11 ,13 ,15 ,25 ℃( taken as control,CK),respectively.Effects on plant height,leaf area,leaf dry weight,stem dry weight and total dry weight, root morphological traits (including root/shoot ratio,length,surface area,average diameter,root volume) and antiox-idant enzyme activities of rice seedlings were determined to better understand potential mechanisms for cold toler -ance.Antioxidant enzyme activities were proline content ,superoxide dismutase ,catalase and peroxidase activities , respectively .Root morphological traits were measured using Win RHIZO root analysing system .Results by means of anova analysis and principal component analysis showed that plant height ,leaf area ,leaf dry weight ,stem dry weight and total dry weight of rice seedlings were significantly decreased under the low temperature treatments ,compared with the control treatment.However,root/shoot ratio,proline content,superoxide dismutase catalase and peroxidase activities were significantly increased under low temperature stress .At seedling stage ,heavier leaf dry weight and to-tal plant dry weight and higher specific leaf weight ( heavier leaf dry weight and smaller leaf area ) and taller plant height may be considered as strong adaptability to cold stress rapidly and accurately .关键词
低温/精量穴直播/水稻/生长特性Key words
Low temperature/Precision hill-drop drilling/Rice/Growth characteristics分类
农业科技引用本文复制引用
潘圣刚,孙杜鹏,雷舜,程坤,饶品祥,莫钊文,刘盼,唐湘如..低温处理对精量穴直播水稻幼苗生长特性的影响[J].华北农学报,2013,(4):139-144,6.基金项目
国家“863”计划项目（2006AA10A307）；广东省科技计划项目（2004B20101007）；广东省自然科学基金博士启动项目（S2011040004466）；农业部作物生理生态与耕作重点实验室开放课题项目（201302）；华南农业大学大学生科技创新项目 （）
