Tissue Nitrogen and Fructan Translocation in Bread Wheat

• 作 者: L.O' Brien
• 机 构: Plant Breeding Institute , The University of Sydney, Narrabri, NSW 2390 , Australia
• 出 处: Agricultural Sciences in China
• 发表日期: 2002年09期
• 关键词: translocation Wheat wheat vegetative genotype filling accumulated breeding matur

Translocation of previously accumulated nitrogen and carbohydrates from vegetative tissue of the wheat plant is a major assimilate source for grain filling. This study was conducted to examine genotype differences in nitrogen and fructan translocation and their relationships to grain yield and protein content. Effects indicated that significant genotype differences existed for nitrogen accumulation at anthesis and fructan at milk stage and their translocation. Two high protein genotypes, Cunningham and PST90-19, accumulated more nitrogen before anthesis and had greater nitrogen translocation, but lower post-anthesis nitrogen uptake,

Translocation of previously accumulated nitrogen and carbohydrates from vegetative tissue of the wheat plant is a major assimilate source for grain filling. This study was conducted to examine major genotype differences in nitrogen and fructan translocation and their relationships to grain yield and protein content. genotype differences existed for nitrogen accumulation at anthesis and fructan at milk stage and their translocation. Two high protein genotypes, Cunningham and PST90-19, accumulated more nitrogen before anthesis and had greater nitrogen translocation, but lower post-anthesis nitrogen uptake,