Mechanisms of salt tolerance in transgenic Arabidopsis thaliana constitutively overexpressing the tomato 14-3-3 protein TFT7 |
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Authors: | Wei Feng Xu Wei Ming Shi |
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Institution: | (1) Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97330, USA;(2) University of California, Riverside, CA 92521, USA |
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Abstract: | A survey was undertaken in southern California in 1999–2000 to search for an avocado soil that exhibits natural suppression
to avocado root rot caused by Phytophthora cinnamomi. The Somis-1 soil, which had consistent massive degradation of P. cinnamomi hyphal mats, low P. cinnamomi populations and good tree health, was shown to be a soil with a high level of microbial suppression to P. cinnamomi in greenhouse studies. Other soils chosen for study, which seemed to demonstrate some type of suppression in the field as
evidenced by high P. cinnamomi soil populations yet with good tree health, did not demonstrate microbial suppression in greenhouse studies. These soils
may represent a type of suppression which is ephemeral or highly dependent on specific environmental factors. The suppression
of the Somis-1 soil was transferable to a conducive soil with as little as 1% natural soil mixed with 99% fumigated soil.
The suppression was gradually eliminated in soil pre-treated at various temperatures from 25° to 90°C. The suppression in
the Somis-1 soil did not correspond with cellulase or laminarinase activity or soil microbial activity. The suppression appeared
to correspond with moderately well-drained soils as found in the Somis-1 soil, which drained at a rate that might be conducive
to the growth and activity of microorganisms antagonistic to P. cinnamomi. |
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Keywords: | Biocontrol Phosphonate Water potential |
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