Reduction of growth and symbiotic nitrogen fixation in soybean as affected by the site of simulated acid rain application

Xianyu Wang, Makoto Tsuda, Tetsuro Taniyama

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Reductions of growth and symbiotic nitrogen fixation were studied in soybean exposed to simulated acid rain (SAR) applied to different sites. Soybean cultivar Okuharawase was grown in 1/5000a pots under a rain shelter. The plants were exposed to SAR from 15 days after sowing (DAS) to the flowering stage at 36 DAS. The sites of SAR application were foliage, soil and both foliage and soil, and the pH of SAR used was 2.7,3.5, 4.5 and 7.0 (control). At the flowering stage, leaf area per plant, apparent photosynthetic rate and root dry weight per plant decreased in proportion to decrease in the pH of SAR. The degree of decrease was similar between the plants exposed to SAR in foliage and soil and those in foliage, but the application of SAR to soil alone did not cause any change in the parameters. There was a consistent reduction in the number of nodules per plant, the fresh weight of nodules per plant and the rate of symbiotic nitorgen fixation, or acetylene reduction activity (ARA) regardless of the site of SAR application. ARA decreased in proportion to the decrease in the number anf fresh weight of nodules. The root dry weight significantly correlated with nodule number or nodule fresh weight. The reduction of growth and symbiotic nitrogen fixation in plants with exposure to SAR in foliage was similar to that with exposure in both foliage and soil, whereas SAR applied to soil alone suppressed nodulation only.

Original languageEnglish
Pages (from-to)596-602
Number of pages7
JournalJapanese Journal of Crop Science
Volume66
Issue number4
Publication statusPublished - Dec 1997
Externally publishedYes

Fingerprint

Acid Rain
Nitrogen Fixation
acid deposition
Soybeans
nitrogen fixation
growth retardation
soybeans
Growth
Soil
Weights and Measures
leaves
soil
Acetylene
acetylene reduction
sowing
flowering
Rain
nodulation
leaf area

Keywords

  • Acetylene reduction activity
  • Acid rain
  • Nodule
  • Photosynthesis
  • Soybean
  • Symbiotic nitorgen fixation

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

Reduction of growth and symbiotic nitrogen fixation in soybean as affected by the site of simulated acid rain application. / Wang, Xianyu; Tsuda, Makoto; Taniyama, Tetsuro.

In: Japanese Journal of Crop Science, Vol. 66, No. 4, 12.1997, p. 596-602.

Research output: Contribution to journalArticle

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