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作物学报 ›› 2011, Vol. 37 ›› Issue (11): 2094-2098.doi: 10.3724/SP.J.1006.2011.02094

• 耕作栽培·生理生化 • 上一篇    下一篇

不同棉花基因型钾效率特征及其根系形态的差异

郝艳淑1，姜存仓1,*，王晓丽1，夏颖1，陈防2   

  1. 1 华中农业大学资源与环境学院，湖北武汉 430070；2 中国科学院武汉植物园，湖北武汉 430074
  • 收稿日期:2011-04-02 修回日期:2011-07-15 出版日期:2011-11-12 网络出版日期:2011-09-06
  • 通讯作者: 姜存仓, E-mail: cotton2000@mail.hzau.edu.cn, Tel: 027-87287141
  • 基金资助:

    本研究由国家自然科学基金项目(40801112)和国际植物营养研究所(IPNI)基金项目(HuBei-37)资助。

Differences of Potassium Efficiency Characteristics and Root Morphology between Two Cotton Genotypes

HAO Yan-Shu1,JIANG Cun-Cang1,*,WANG Xiao-Li1,XIA Ying1,CHEN Fang2   

  1. 1 College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; 2 Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
  • Received:2011-04-02 Revised:2011-07-15 Published:2011-11-12 Published online:2011-09-06
  • Contact: 姜存仓, E-mail: cotton2000@mail.hzau.edu.cn, Tel: 027-87287141

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1648

被引次数

31

摘要： 以水培方法研究钾对两种棉花基因型钾效率特征及其根系形态上的差异。结果表明，高效基因型103钾利用效率在低钾与适钾时分别为160.2 g g-1和47.5 g g-1，而低效基因型122为133.8 g g-1和37.9 g g-1；在低钾和适钾处理时，103叶片钾积累量占全株钾积累量的84.6%和62.6%，122分别是63.4%和56.0%。在不同钾处理下103根系各参数均高于122，低钾时103总根长和根总表面积分别增加46.2%和13.9%，122根系各参数则均下降。缺钾抑制了粗根的生长，103在低钾时粗根的总根长、根表面积和根体积分别降低了54.0%、62.8%和75.2%；122粗根各参数也有所降低。但低钾时103细根的总根长、根表面积和根体积增加了69.0%、77.0%和80.4%，分别是122的1.9、2.3和2.6倍。

关键词: 棉花, 基因型, 钾效率, 根系形态

Abstract: The objective of this study was to analysis K-efficiency and root morphology in two kinds of K-efficiency cotton genotypes. The results showed that K-efficiency of genotype 103 was 160.2 g g-1 and 47.5 g g-1 at low (4 mg L–1) and high (40 mg L–1) K levels while genotype 122 was 133.8 g g-1 and 37.9 g g-1. In addition, genotype103 had higher ability to transfer K to leaves than genotype 122. Under two K levels, Leaves K accumulation of genotype 103 was 84.6% and 62.6% of the whole plant, while that of genotype 122 was 63.4% and 56.0%. High K-efficiency genotype 103 had higher total root length, surface area and volume than low K-efficiency genotype 122 regardless of the K concentration treated. Especially when the concentration of K in the environment was poor, genotype103 still had better root system than genotype122. When K was insufficient, the total root length and total root surface area of genotype 103 increased by 46.2% and 13.9%, while genotype 122 showed decreases in root parameters. Root system was classified into fine roots, middle roots and coarse roots according to root diameter. Low K condition limited the development of coarse roots. In genotype 103, coarse root length, surface area and root volume decreased by 54.0%, 62.8%, and 75.2% respectively, meanwhile, genotype 122 also had a reducing coarse root parameters. Effect of low K condition on fine roots varied in different cotton genotypes. The fine root length, surface area and volume of genotype 103 increased by 69.0%, 77.0%, and 80.4%, compared with these in appropriate K treatment, and were 1.9, 2.3, and 2.6 times higher than these of genotype 122, respectively.

Key words: Cotton, Genotype, K-efficiency, Root morphology

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