Hao Yu

Universität Bern | UniBe · Institute of Plant Sciences

Conifers are dominant tree species in boreal forests, but are susceptible to attack by bark beetles. Upon bark beetle attack, conifers release substantial quantities of volatile organic compounds known as herbivore-induced plant volatiles (HIPVs). Earlier studies of broadleaved plants have shown that HIPVs provide information to neighbouring plants...

Ozone (O3) enters plants through the stomata, passes into the intercellular air space and is decomposed in cell walls. Two factors that affect the O3 level in the intercellular air space are the stomatal conductance and the concentration of biogenic volatile organic compounds (BVOCs). Stomatal conductance controls the O3 flux into the air space and...

Increased tropospheric ozone (O3) concentrations in boreal forests affect the emission of biogenic volatile organic compounds (BVOCs), which play crucial roles in biosphere-atmosphere feedbacks. Although it has been well documented that BVOC emissions are altered in response to elevated O3, consequent effects on the carbon budget have been largely...

Numerous studies have demonstrated the negative effects of elevated O3 on leaf photosynthesis. Within trees, a portion of respired CO2 is assimilated by woody tissue photosynthesis, but its response to elevated O3 remains unclear. Saplings of two evergreen tree species, EuCahetus dunnii Maiden (E. dunnii) and Osmanthus fragrans (Thunb.) Lour. (O. f...

Wetlands cover only 3 % of the global land surface area, but boreal wetlands are experiencing an unprecedented warming of four times the global average. These wetlands emit isoprene and terpenes (including monoterpenes (MT), sesquiterpenes (SQT), and diterpenes (DT)), which are climate-relevant highly reactive biogenic volatile organic compounds (B...

Metal(loid)s contamination poses a serious threat to ecosystem biosafety and human health. Phytoremediation is a cost-effective and eco-friendly technology with good public acceptance, although the process does require a significant amount of time for success. To enhance the phytoremediation efficiency, numerous approaches have been explored, inclu...

Volatile cues can induce and/or prime plant defences, but it is less well known if plants also respond by altering growth and reproduction‐related parameters. Here, we evaluated whether plant volatile cues can elicit changes in growth, flower production, net photosynthesis rate and defences in receiver plants and whether those responses are similar...

Terpenes, a class of hydrocarbons including isoprene (C5H8), monoterpenes (MTs; C10H16), sesquiterpenes (SQTs; C15H24), and diterpenes (DTs; C20H32), are highly reactive to atmospheric oxidants and can form highly oxidized organic molecules (HOMs), leading to new particle formation (NPF), and secondary pollutants like tropospheric ozone and seconda...

We investigated the responses in growth and emissions of biogenic volatile organic compounds (BVOCs) in Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies [L.] Karst.) and silver birch (Betula pendula Roth) seedlings to a simulated climate warming of +2 °C (T2) and +4 °C (T4), compared to the ambient conditions, during two growing seasons...

Citation: Yu, H.; Holopainen, J.K.; Kivimäenpää, M.; Virtanen, A.; Blande, J.D. Potential of Climate Change and Herbivory to Affect the Release and Atmospheric Reactions of BVOCs from Boreal and Subarctic Forests. Molecules 2021, 26, 2283.

To assess the impacts of ozone (O3) on carbon metabolism of subtropical broadleaved tree species, seedlings of Phoebe bournei and Phoebe zhennan were exposed to elevated O3 levels in open-top chambers (OTCs) from June to November 2014. Three treatments were conducted in nine total OTCs, including charcoal-filter air (CF) as a control treatment, low...

[Objective] Considerable researches have documented the negative effects of O3 on woody species in North America and Europe, however, little is known about how woody tree species respond to elevated O3 in subtropical China. The objectives of this study are to investigate the effects of elevated O3 on two evergreen tree species in subtropical China,...

Tropospheric ozone (O3) enrichment could change the carbon (C) metabolism and decrease the C stock for tree species. To assess the differences in response of non-structural carbohydrates (NSCs) between Machilus ichangensis Rehd. etWils. (M. ichangensis) and Taxus wallichiana Zucc. var. chinensis (Pilg.) Florin (T. wallichiana) with elevated O3, one...

Considerable researches have documented the negative effects of ozone on woody species in North America and Europe; however, little is known about how woody tree species respond to elevated O3 in subtropical China, and most of the previous studies were conducted using pot experiment. In the present study, Machilus ichangensis Rehd. et Wils (M. icha...

Many tree species in forest ecosystems have symbiotic relationships with ectomycorrhizal fungi (ECM), which protects their hosts from environmental stress. Effects of ECM on growth, elemental nutrients, and rhizosphere soil of Pinus massoniana seedlings under simulated acid rain were analyzed in this study to provide a scientific basis for restorat...

Objective: To study the effects of O3 on the change law of photosynthesis and occurrence of visible symptoms. Methods: One-year-old seedlings of Phoebe zhennan S. Lee et FNWei, Phoebe bournei(Hemsl.) Yang and Machilus pauhoi Kanehira, the native tree species in subtropical regions, were exposed to the O3concentrations gradient consisting of low O3...

Elevated ozone will cause substantial changes of root architecture that may ultimately affect the function of root and thereby the tree's overall health and ability to cope with stress. The effects of elevated ozone on the root of trees included root growth, fine root dynamics and turnover, root respiration, carbohydrates in roots, mycorrhiza growt...

Tropospheric ozone (O3) is considered one of the most critical air pollutants in many parts of the world due to its detrimental effects on plants growth. However, the stoichiometric response of tree species to elevated ozone (O3) is poorly documented. In order to understand the effects of elevated ozone on the stoichiometry and nutrient pools of Ph...

Ground-level ozone (O3) pollution has affected carbon metabolism in tree species, which becomes one of the top environmental issues in China. In this paper, 1-year-old seedlings of Phoebe bournei and Pinus massoniana Lamb. were grown under field conditions at a rural site near the city of Taihe (Jiangxi Province). The plants were exposed in open-to...