10 research outputs found
HT-2 and T-2 toxins in Norwegian oat grains related to weather conditions at different growth stages
Predicting deoxynivalenol in oats under conditions representing Scandinavian production regions
Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes
Whether climate change will turn cold biomes from large long-term carbon sinks into
sources is hotly debated because of the great potential for ecosystem-mediated feedbacks
to global climate. Critical are the direction, magnitude and generality of climate responses
of plant litter decomposition. Here, we present the first quantitative analysis of the major
climate-change-related drivers of litter decomposition rates in cold northern biomes
worldwide. Leaf litters collected from the predominant species in 33 global change
manipulation experiments in circum-arctic-alpine ecosystems were incubated simultaneously
in two contrasting arctic life zones. We demonstrate that longer-term, large-scale
changes to leaf litter decomposition will be driven primarily by both direct warming
effects and concomitant shifts in plant growth form composition, with a much smaller
role for changes in litter quality within species. Specifically, the ongoing warminginduced
expansion of shrubs with recalcitrant leaf litter across cold biomes would
constitute a negative feedback to global warming. Depending on the strength of other
(previously reported) positive feedbacks of shrub expansion on soil carbon turnover, this
may partly counteract direct warming enhancement of litter decomposition
Ecotypic variation of water-soluble carbohydrate concentration and winter hardiness in cocksfoot (Dactylis glomerata L.)
Portrait of Governor Thomas Bibb
This is a circa 1820 portrait of Governor Thomas Bibb, who was the second governor for the State of Alabama
Evaluation of the temporal distribution of Fusarium graminearum airborne inoculum above the wheat canopy and its relationship with Fusarium head blight and DON concentration
Fusarium head blight incidence and detection of Fusarium toxins in wheat in relation to agronomic factors
Fusarium Species Infection in Wheat: Impact on Quality and Mycotoxin Accumulation
International audienceWheat is the most consumed cereal worldwide and can be processed to different products for human consumption. This crop can be infected by Fusarium species, among them those within the Fusarium graminearum complex causing Fusarium head blight (FHB. The disease can severely reduce grain yield and quality under conditions of high humidity and warm temperatures during anthesis. Moreover the grains can be contaminated with mycotoxin such as trichothecenes, among them deoxynivalenol and their acetyl derivates 3-ADON, 15-ADON and DON-3-glucoside. Some years, depending on the environmental conditions Fusarium proliferatum can also infect the grain and fumonisin contamination can be observed. To understand the way of grain infection by Fusarium species will help to undertake strategies to reduce the problem both at pre-harvest and during processing to select adequate procedures to manage mycotoxin production. Different strategies at different stages of the wheat chain have been proposed to reduce the impact of FHB and mycotoxin accumulation