Vermiculite's strong buffer capacity renders it unsuitable for studies of acidity on soybean (Glycine max L.) nodulation and growth

Indrasumunar, Arief and Gresshoff, Peter M. (2013) Vermiculite's strong buffer capacity renders it unsuitable for studies of acidity on soybean (Glycine max L.) nodulation and growth. BMC Research Notes, 6 1: 465.1-465.8. doi:10.1186/1756-0500-6-465


Author Indrasumunar, Arief
Gresshoff, Peter M.
Title Vermiculite's strong buffer capacity renders it unsuitable for studies of acidity on soybean (Glycine max L.) nodulation and growth
Journal name BMC Research Notes   Check publisher's open access policy
ISSN 1756-0500
Publication date 2013
Year available 2013
Sub-type Article (original research)
DOI 10.1186/1756-0500-6-465
Open Access Status DOI
Volume 6
Issue 1
Start page 465.1
End page 465.8
Total pages 9
Place of publication London, United Kingdom
Publisher BioMed Central Ltd.
Collection year 2014
Language eng
Subject 1300 Biochemistry, Genetics and Molecular Biology
2700 Medicine
Abstract Background: Vermiculite is the most common soil-free growing substrate used for plants in horticultural and scientific studies due to its high water holding capacity. However, some studies are not suitable to be conducted in it. The described experiments aimed to test the suitability of vermiculite to study the effect of acidity on nodulation and growth of soybean (Glycine max L.). Methods. Two different nutrient solutions (Broughton & Dilworth, and modified Herridge nutrient solutions) with or without MES buffer addition were used to irrigate soybean grown on vermiculite growth substrates. The pH of nutrient solutions was adjusted to either pH 4.0 or 7.0 prior its use. The nodulation and vegetative growth of soybean plants were assessed at 3 and 4 weeks after inoculation. Results: The unsuitability of presumably inert vermiculite as a physical plant growth substrate for studying the effects of acidity on soybean nodulation and plant growth was illustrated. Nodulation and growth of soybean grown in vermiculite were not affected by irrigation with pH-adjusted nutrient solution either at pH 4.0 or 7.0. This was reasonably caused by the ability of vermiculite to neutralise (buffer) the pH of the supplied nutrient solution (pH 2.0 - 7.0). Conclusions: Due to its buffering capacity, vermiculite cannot be used as growth support to study the effect of acidity on nodulation and plant growth.
Keyword Acidity
Buffer
Nodulation
Soybean
Vermiculite
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Integrative Legume Research Publications
School of Agriculture and Food Sciences
Official 2014 Collection
 
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