caa a22 4500 477111327 CHVBK 20180405111609.0 cr unu---uuuuu 170330e19960201xx s 000 0 eng 10.1007/BF00009326 doi (NATIONALLICENCE)springer-10.1007/BF00009326 Mycorrhizal colonisation, root browning and soil properties associated with a growth disorder of cotton in Australia [Elektronische Daten] [D. Nehl, S. Allen, J. Brown] The symptoms of a growth disorder of cotton and associated properties of the soil were quantified. Data were collected from 35 sites across two irrigated fields that showed gradients in the severity of early season stunting of cotton. Ordination analysis of soil characteristics distinguished three groups of sites (A, B, and C) which corresponded to patterns of yield and early season growth. Group A and B soils had lower pH, finer texture and higher P, Zn, Mn and exchangeable Mg, K and Na than group C soils. Early season growth and arbuscular mycorrhizal colonisation of cotton at group A and B sites was much slower than at group C sites. Group B sites showed a recovery of yield later in the season while group A sites did not. Nutrient deficiencies, waterlogging, soil compaction, soil sodicity and Mn toxicity were unlikely causes of early season stunting, although soil Mn was a good predictor for the disorder. Thielaviopsis basicola, Verticillium dahliae and unidentified Chytridiomycetes were not associated with stunting and reduced yield, although other fungal pathogens may have been present. Root browning was a symptom of the disorder and suggests that pathogens, perhaps bacteria, play a causal role. This study showed that the growth disorder involved an interaction between cotton and the soil flora which was associated with heavy soil texture. Kluwer Academic Publishers, 1996 arbuscular mycorrhiza nationallicence cotton nationallicence manganese nationallicence pH nationallicence phosphorus nationallicence root browning nationallicence soil texture nationallicence Thielaviopsis basicola nationallicence Verticillium dahliae nationallicence zinc nationallicence Nehl D. Department of Botany, University of New England, 2351, Armidale, NSW, Australia aut Allen S. Australian Cotton Research Institute, Myall Vale, 2390, Narrabri, NSW, Australia aut Brown J. Department of Botany, University of New England, 2351, Armidale, NSW, Australia aut Plant and Soil Kluwer Academic Publishers 179/2(1996-02-01), 171-182 0032-079X 179:2<171 1996 179 11104 https://doi.org/10.1007/BF00009326 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00009326 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nehl D. Department of Botany, University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 700 1- Allen S. Australian Cotton Research Institute, Myall Vale, 2390, Narrabri, NSW, Australia aut NATIONALLICENCE 700 1- Brown J. Department of Botany, University of New England, 2351, Armidale, NSW, Australia aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 179/2(1996-02-01), 171-182 0032-079X 179:2<171 1996 179 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer