›› 2010, Vol. 22 ›› Issue (6): 818-823.

• 论文 • 上一篇    下一篇

低磷胁迫对‘浙粳22’等8个晚粳稻品种苗期性状和养分吸收的影响

周涯1,2,修芬连1,2,石建尧3,叶胜海2,赵宁春2,陈萍萍1,2,金庆生2,张小明2,*   

  1. 1 浙江师范大学 化学与生命科学学院,浙江 金华 321004;2 浙江省农业科学院 作物与核技术利用研究所,浙江 杭州 310021;3 浙江省种子总站,浙江 杭州 310020
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-11-25 发布日期:2010-11-25

Effect of phosphorus deficiency stress on seedling characters and nutrient absorption of japonica rice varieties

ZHOU Ya;XIU Fen-lian;SHI Jian-yao;YE Sheng-hai;ZHAO Ning-chun;CHEN Ping-ping;JIN Qing-sheng;ZHANG Xiao-ming;*   

  1. 1 College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China; 2 Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China; 3 Zhejiang Seed Management Station, Hangzhou 310020, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-11-25 Published:2010-11-25

摘要: 以浙江省晚粳稻主栽品种‘浙粳22’、‘浙粳27’、‘秀水110’、‘秀水09’、‘秀水128’、‘秀水63’、‘嘉991’和‘嘉花1号’为材料,研究了低磷胁迫(0.5 mg/L)下根系和秧苗生长情况。结果表明,不同品种的根长、干物质重、氮、磷、钾养分吸收、根系磷素吸收动力学参数Imax(最大吸收速率)、Km(吸收速率=1/2 Imax时介质中离子的浓度)和Cmin(根系净吸收速率为零时介质中离子的浓度)均存在显著差异,‘浙粳22’、‘浙粳27’、‘秀水110’、‘秀水09’和‘秀水63’低磷胁迫时Km和Cmin较小,Imax较大,对磷的亲和力和利用效率较高,具有一定的耐低磷特性;相反,‘嘉花1号’、‘嘉991’和‘秀水128’的Km和Cmin较大,Imax较小,对磷的亲和力较低,对低磷胁迫表现较为敏感。

关键词: 水稻, 低磷胁迫, 苗期性状, 养分吸收

Abstract: A hydroponic experiment was conducted to study the effect of low phosphorus (0.5 mg·L-1) on root length, dry weight, nitrogen, phosphorus, potassium uptake and root phosphorus uptake kinetic parameters of japonica rice varieties Zhejing 22, Zhejing 27, Xiushui 110, Xiushui 09, Xiushui 128, Xiushui 63, Jia 991 and Jiahua 1. The results showed that there were significant differences among varieties in root length, biomass, nitrogen, phosphorus and potassium uptake and root phosphorus uptake kinetic parameters (Imax, Km and Cmin). Zhejing 22, Zhejing 27, Xiushui 110, Xiushui 09 and Xiushui 63 showed lower Km and Cmin, but higher Imax values under phosphorus deficiency stress, and they also showed longer root length, higher dry seedling weight and phosphorus utilization efficiency. Meanwhile, Jiahua 1, Jia 991 and Xiushui 128 showed higher Km and Cmin, but lower Imax values and lower biomass, phosphorus utilization efficiency under phosphorus deficiency stress.

Key words: rice, phosphorus deficiency stress, seedling characters, nutrient absorption