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Plant Signal Behav

Title:		"The same boat, different storm: stress volatile emissions in response to biotrophic fungal infections in primary and alternate hosts"
Author(s):		Sulaiman HY; Runno-Paurson E; Niinemets U;
Address:		"Chair of Crop Science and Plant Biology, Estonian University of Life Sciences, Tartu, Estonia. Estonian Academy of Sciences, Tallinn, Estonia"
Journal Title:		Plant Signal Behav
Year:		2023
Volume:		20230526
Issue:
Page Number:		2217030 -
DOI:		10.1080/15592324.2023.2217030
ISSN/ISBN:		1559-2324 (Electronic) 1559-2316 (Linking)
Abstract:		"Rust infection results in stress volatile emissions, but due to the complexity of host-pathogen interaction and variations in innate defense and capacity to induce defense, biochemical responses can vary among host species. Fungal-dependent modifications in volatile emissions have been well documented in numerous host species, but how emission responses vary among host species is poorly understood. Our recent experiments demonstrated that the obligate biotrophic crown rust fungus (P. coronata) differently activated primary and secondary metabolic pathways in its primary host Avena sativa and alternate host Rhamnus frangula. In A. sativa, emissions of methyl jasmonate, short-chained lipoxygenase products, long-chained saturated fatty acid derivatives, mono- and sesquiterpenes, carotenoid breakdown products, and benzenoids were initially elicited in an infection severity-dependent manner, but the emissions decreased under severe infection and photosynthesis was almost completely inhibited. In R. frangula, infection resulted in low-level induction of stress volatile emissions, but surprisingly, in enhanced constitutive isoprene emissions, and even severely-infected leaves maintained a certain photosynthesis rate. Thus, the same pathogen elicited a much stronger response in the primary than in the alternate host. We argue that future work should focus on resolving mechanisms of different fungal tolerance and resilience among primary and secondary hosts"
Keywords:		defense signaling pathways host-pathogen interaction infection severity isoprene limiting nutrient pathogen stress photosynthesis volatile organic compounds;
Notes:		"PublisherSulaiman, Hassan Yusuf Runno-Paurson, Eve Niinemets, Ulo eng 2023/05/26 Plant Signal Behav. 2023 May 26:2217030. doi: 10.1080/15592324.2023.2217030"