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.



This article in AJ

  1. Vol. 64 No. 6, p. 796-798
    Received: Feb 28, 1972

Request Permissions


Effect of Soil Temperature on Rhizobium japonicum Serogroup Distribution in Soybean Nodules1

  1. D. F. Weber and
  2. V. L. Miller2



Studies were conducted to determine if temperature, as suggested in a previous study, influenced the distribution of serogroups in nodules of soybeans grown in these same soils. The soybean variety ‘Lee’ was grown at constant soil temperatures of 10, 20 and 30 C and 15, 20, 25 and 30 C, respectively, in two greenhouse experiments. Codorus silt loam containing an established population of Rhizobium japonicnm was taken from sites of a previous date of planting study and incubated for one week at the desired temperature before uninoculated seed was planted.

Plant growth characteristics, nodulation and distribution of R. japonicum serogroups in the nodules were recorded. Plant development and nodulation generally were favored by increasing temperatures with 30 C the most favorable temperature for all characteristics except nodule size.

Serological distribution of R. japonicum in the nodules was influenced by soil temperature. Serogroups which were infrequently recovered at the lower temperatures became dominant at 30 C whereas serogroups forming the majority of nodules at 10 or 15 C formed fewer nodules at 30 C. Leaf chlorosis which is induced by R. japonicum serogroup 94 was evident only at 30 C where its incidence in the nodules was highest.

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

Copyright © .