About Us | Help Videos | Contact Us | Subscriptions
 

Members of ASA, CSSA, and SSSA: Due to system upgrades, your subscriptions in the digital library will be unavailable from May 15th to May 22nd. We apologize for any inconvenience this may cause, and thank you for your patience. If you have any questions, please call our membership department at 608-273-8080.

 

Institutional Subscribers: Institutional subscription access will not be interrupted for existing subscribers who have access via IP authentication, though new subscriptions or changes will not be available during the upgrade period. For questions, please email us at: queries@dl.sciencesocieties.org or call Danielle Lynch: 608-268-4976.

Abstract

 

This article in JEQ

  1. Vol. 21 No. 1, p. 46-49
     
    Received: Feb 18, 1991


    * Corresponding author(s):
 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/jeq1992.00472425002100010006x

Nitrogen Fixation in Soybean Treated with Nitrogen Dioxide and Molybdenum

  1. Gian Gupta  and
  2. Radhika Narayanan
  1. Both authors, Dep. of Natural Sciences, Univ. of Maryland Eastern Shore, Princess Anne, MD 21853

Abstract

Abstract

Soybean plants were treated with Mo (0.0 or 2.0 mg kg−1, soil dry wt.) and exposed to NO2 (0.0, 0.05, or 0.1 µmol mol−1) at flowering stage. Specific root nodule activity (SNA), chlorophyll-a (Ch-a), chlorophyll-b (Ch-b), leaf N, number of pods, seeds per pod, weight of seeds, and shoot dry weight were measured. Compared with control, SNA did not change on the addition of 2 mg Mo to the soil, but increased by 65% on exposure to 0.1 µmol mol−1 NO2 and by 106% on treatment with both NO2 and Mo. Both Ch-a and Ch-b increased significantly on exposure to 0.1 µmol mol−1 NO2 and the amount of this increase with 0.05 µmol mol−1 NO2 and 2 mg MO was almost the same as with 0.1 µmol mol−1 NO2 alone. Leaf-N increased by 46% on exposure to NO2 but did not change on the addition of Mo. Pod number, seed number and weight, and shoot dry weights showed significantly higher values on exposure to 0.1 µmol mol−1 NO2 and 2 mg Mo.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .