Towards Phytopathogen Diagnostics? Coconut Bud Rot Pathogen <i>Phytophthora palmivora</i> Mycelial Proteome Analysis Informs Genome Annotation

Nekrakalaya, Bhagya; Arefian, Mohammad; Kotimoole, Chinmaya Narayana; Krishna, Rajesh Muliyar; Palliyath, Gangaraj Karyath; Najar, Mohammad Altaf; Behera, Santosh Kumar; Kasaragod, Sandeep; Paulraj, S.; Hegde, Vinayaka; Prasad, T. S. Keshava

doi:10.1089/omi.2021.0208

Cited by 1 publication

(1 citation statement)

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“…The oomycete Phytophthora palmivora's is a generalist tropical pathogen mostly affecting cocoa, coconut, pineapple, rubber tree, papaya, durian and oil palm (Torres et al 2016, Adeniyi 2019, Mohamed Azni et al 2019, Perrine-Walker 2020, Nekrakalaya et al 2022. Its infection cycle begins with swimming zoospores that identify the host root (figure 1(A)).…”

Section: Introductionmentioning

confidence: 99%

Enhanced germination and electrotactic behaviour of Phytophthora palmivora zoospores in weak electric fields

et al. 2023

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Soil-dwelling microorganisms use a variety of chemical and physical signals to navigate their environment. Plant roots produce endogenous electric fields which result in characteristic current profiles. Such electrical signatures are hypothesised to be used by pathogens and symbionts to track and colonise plant roots.The oomycete pathogen Phytophthora palmivora generates motile zoospores which swim towards the positive pole when exposed to an external electric field in vitro.Here, we provide a quantitative characterization of their electrotactic behaviour in 3D. We found that a weak electric field (0.7 - 1.0 V/cm) is sufficient to induce an accumulation of zoospore at the positive pole, without affecting their encystment rate. We also show that the same external electric field increases the zoospore germination rate and orients the germ tube’s growth. We conclude that several early stages of the P. palmivora infection cycle are affected by external electric fields.Taken together, our results are compatible with the hypothesis that pathogens use plant endogenous electric fields for host targeting.

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Section: Introductionmentioning

confidence: 99%