Chemical sensing of plant stress at the ecosystem scale
By T. Karl, Alex B. Guenther, A. Turnipseed, E. Patton, K. Jardine. 2008
120 citations recorded by the source corpus.
Significant ecosystem-scale emissions of methyl- salicylate (MeSA), a semivolatile plant hormone thought to act as the mobile signal for systemic acquired resistance (SAR), were observed in an agroforest. Our measurements show that plant internal defence mechanisms can be acti- vated in response to temperature stress and are modulated by water availability on large scales. Highest MeSA fluxes (up to 0.25 mg/m 2 /h) were observed after plants experienced ambient night-time temperatures of 7.5 C followed by a large daytime temperature increase (e.g. up to 22 C). Un- der these conditions estimated night-time leaf temperatures were as low as 4.6 C, likely inducing a response to pre- vent chilling injury. Our observations imply that plant hor- mones can be a significant component of ecosystem scale volatile organic compound (VOC) fluxes (e.g. as high as the total monoterpene (MT) flux) and therefore contribute to the missing VOC budget. If generalized to other ecosystems and different types of stresses these findings suggest that semivolatile plant hormones have been overlooked by inves- tigations of the impact of biogenic VOCs on aerosol forma- tion events in forested regions. Our observations show that the presence of MeSA in canopy air serves as an early chem- ical warning signal indicating ecosystem-scale stresses be- fore visible damage becomes apparent. As a chemical met- ric, ecosystem emission measurements of MeSA in ambient air could therefore support field studies investigating factors that adversely affect plant growth.
Subfields: Atmospheric Science, Insect Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/cf1f9159335ff62bc82683640e4dacf3c68c97a6
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Atmospheric Science
In Insect Science
In Plant Science
Citations in the corpus
- Salicylic Acid, a multifaceted hormone to combat disease. (2009, background): “Also, high levels of MeSA were detected in a forest canopy in response to ecosystem-scale abiotic stresses (84).”
- Biological and Chemical Diversity of Biogenic Volatile Organic Emissions into the Atmosphere (2013, background): “, toluene andmethyl salicylate) are associated with plant stress and have been observed at elevated rates from stressed plants [73, 88].”
- Salicylic Acid Biosynthesis and Metabolism (2011, background): “…SA (Shulaev et al, 1997), the biological relevance of MeSA may be to transport SA between or within (discussed below) plants and thereby signal/trigger defense responses to biotic or abiotic stresses (Shulaev et al, 1997; Baldwin et al, 2006; S. Park et al, 2007; Koo et al, 2007; Karl et al, 2008).”