Primed to fail: Primed acclimation to water stress can lead to greater disease severity and reduced yields in Sclerotium rolfsii -inoculated cultivated peanut ( Arachis hypogaea L.).

Key Points

Inoculated peanut cultivars showed increased disease severity when primed for water stress, indicating adverse outcomes.
Key interaction of cultivar, primed acclimation, and additional water stress led to significantly higher severity levels in specific treatment groups.
Analysis of fungal infection types showed reduced secondary transmission in one primed treatment group of peanut plants.
These findings stress the risks of implementing water stress acclimation strategies without understanding potential negative effects.

Abstract

We documented the absence of a beneficial cross-priming result as we did not see reduced southern blight progression among plants exposed to the PWS. Crucially, we observed a three-way interaction between cultivar, PWS, and SWS in inoculated plants, whereby the treatment combinations "Georgia-06G→P-50FC→S-0FC" and "Florun331→P-50FC→S-100FC" had substantially greater disease severity than their P-100FC counterparts. Serendipitously, we observed reduced secondary transmission of southern blight in P-50FC treated plants. Overall, our results caution that drought acclimation may not only fail to deliver crop production benefits but could even have an adverse influence on peanut yields and disease severity.

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Cite This Study

Hickman et al. (Wed,) studied this question.

synapsesocial.com/papers/69a75d22c6e9836116a26a64 https://doi.org/https://doi.org/10.1093/aob/mcag013

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