植物营养与肥料学报2013，Vol.19Issue(1)：158-165,8.DOI:10.11674/zwyf.2013.0119
野生大豆根系形态对局部磷供应的响应及其对磷吸收的贡献
Effect of localized phosphorus supply on root morphological traits and their contribution to phosphorus uptake in wild soybean
摘要
Abstract
A soil column experiment simulating the localized supplies of phosphorus ( P) was conducted to quantitatively evaluate the effect of localized P supply on root morphological parameters and the contribution of root morphological parameters to P uptake in wild soybean ( Glycine soja Sieb. et Zucc). The results showed that localized P supply significantly modified the root morphological parameters in wild soybean. Total root length, specific root length and root surface area increased by 80. 5% , 32. 6% and 70. 7% , respectively, while average root diameter decreased by 27. 6%. Adjustment of root morphology resulted in the 43. 2% increase in shoot P uptake and 72. 0% increase in aboveground dry weight, respectively. In all of the root morphological parameters, total root length, root surface and specific root length had significantly greater contribution to shoot P uptake, and specific root length showed the largest contribution to shoot P uptake, indicating that simultaneous increase of total root length and decrease of average root diameter can obviously improve the P uptake of wild soybean. In conclusion, wild soybean exhibited highly plastic responses of root morphology to P localized supply, and enhanced the acquisition of heterogeneous soil P by optimizing root spatial distribution and changing the root morphological traits as an effective strategy of root management.关键词
野生大豆/磷/根形态/根构型/养分吸收Key words
wild soybean/ phosphorus/ root morphology/ root architecture/ nutrient uptake分类
农业科技引用本文复制引用
林雅茹,唐宏亮,申建波..野生大豆根系形态对局部磷供应的响应及其对磷吸收的贡献[J].植物营养与肥料学报,2013,19(1):158-165,8.基金项目
北京市自然科学基金(6122021) （6122021）
国家自然科学基金(30890131,30925024)提供部分资助. （30890131,30925024）
