摘要
以培两优500和汕优63为供试材料,研究了其腋芽再生特性。与汕优63相比,培两优500腋芽萌发好,活芽率高,在头季稻后期茎部干物质积累和非结构碳水化合物含量表现出明显的优势。成熟期茎节各节位干物质量、可溶性糖含量和淀粉含量与活芽率呈显著正相关;齐穗后20d茎部SOD、POX酶活性均有所回升,至成熟期达最大,活性氧自由基清除能力强,腋芽萌发好;头季稻后期根系吸收面积和比表面积大,活力强,根系衰老缓慢,有利于腋芽萌发生长。
A two-line hybrid rice combination Peiliangyou 500 and a three-line hybrid rice Shanyou 63 were used to study their ratooning characters of axillary buds.Compared to Shanyou 63, Peiliangyou 500 had higher ratooning ability of axillary buds and living bud rate,showing significant heterosis in dry matter accumulation and nonstructural carbohydrate content at late stage of the main crop. There were significant relationship between living bud rate and the dry matter weight of different stem nodes, soluble carbohydrate content and starch content, respectively. The activities of SOD and POX were increased 20 days after full heading of the main crop and reached the highest at maturity stage, leading to raise the ability of eliminating free radicals and active oxygen and improve the sprouting of axillary buds. It would be favorable to enhance ratooning ability of axillary buds with larger area of root absorption and specific surface area at late stage of the main crop.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2005年第4期323-327,共5页
Chinese Journal of Rice Science
基金
国家自然科学基金资助项目(30370835)
湖南省中青年基金资助项目(00JZY2147)
湖南省自然科学基金资助项目(98JJY2009)
湖南省教育厅青年基金资助项目(00B003)。
关键词
杂交稻
腋芽
腋芽特性
生理机制
hybrid rice
axillary bud
ratooning property
physiological mechanism
