Journal: Environmental and Experimental Botany

Abbreviation

Environ. Exp. Bot.

Publisher

Elsevier

Journal Volumes

ISSN

0098-8472
1873-7307

Description

Filters

Reset filters

Search Results

Publications 1 - 10 of 23
  • Can iron plaque affect Sb(III) and Sb(V) uptake by plants under hydroponic conditions
    Item type: Journal Article
    Ji, Ying; Vollenweider, Pierre; Lenz, Markus; et al. (2018)
    Environmental and Experimental Botany
  • Expression of selected genes involved in cadmium detoxification in tobacco plants grown on a sulphur-amended metal-contaminated field
    Item type: Journal Article
    Fässler, Erika; Pairraud, Adrien; Gupta, Satish Kumar; et al. (2010)
    Environmental and Experimental Botany
  • Response of native grasses and Cicer arietinum to soil polluted with mining wastes
    Item type: Journal Article
    Conesa, Héctor M.; Moradi, A.B.; Robinson, Brett H.; et al. (2009)
    Environmental and Experimental Botany
  • Apoplastic pH and growth in expanding leaves of Vicia faba under salinity
    Item type: Journal Article
    Pitann, Britta; Kranz, Thorsten; Zörbb, Christian; et al. (2011)
    Environmental and Experimental Botany
  • Effects of elevated growth temperature and enhanced atmospheric vapour pressure deficit on needle and root terpenoid contents of two Douglas fir provenances
    Item type: Journal Article
    Duan, Qingyun; Kleiber, Anita; Jansen, Kirstin; et al. (2019)
    Environmental and Experimental Botany
  • Soil nutrients and lowered source:sink ratio mitigate effects of mild but not of extreme drought in trees
    Item type: Journal Article
    Schönbeck, Leonie; Gessler, Arthur; Schaub, Marcus; et al. (2020)
    Environmental and Experimental Botany
  • Phytofiltration of mercury-contaminated water
    Item type: Journal Article
    Moreno, Fabio N.; Anderson, Christopher W.N.; Stewart, Robert B.; et al. (2008)
    Environmental and Experimental Botany
  • Effect of heat stress on the photosynthetic apparatus in maize (Zea mays L.) grown at control or high temperature
    Item type: Journal Article
    Sinsawat, Veerana; Leipner, Jörg; Stamp, Peter; et al. (2004)
    Environmental and Experimental Botany
  • Arsenic redox transformations and cycling in the rhizosphere of Pteris vittata and Pteris quadriaurita
    Item type: Journal Article
    Wagner, Stefan; Hoefer, Christoph; Puschenreiter, Markus; et al. (2020)
    Environmental and Experimental Botany
    Pteris vittata (PV) and Pteris quadriaurita (PQ) are reported to hyperaccumulate arsenic (As) when grown in As-rich soil. Yet, little is known about the impact of their unique As accumulation mechanisms on As transformations and cycling at the soil-root interface. Using a combined approach of two-dimensional (2D), sub-mm scale solute imaging of arsenite (AsIII), arsenate (AsV), phosphorus (P), manganese (Mn), iron (Fe) and oxygen (O2), we found localized patterns of AsIII/AsV redox transformations in the PV rhizosphere (AsIII/AsV ratio of 0.57) compared to bulk soil (AsIII/AsV ratio of ≤0.04). Our data indicate that the high As root uptake, translocation and accumulation from the As-rich experimental soil (2080 mg kg−1) to PV fronds (6986 mg kg−1) induced As detoxification via AsV reduction and AsIII root efflux, leading to AsIII accumulation and re-oxidation to AsV in the rhizosphere porewater. This As cycling mechanism is linked to the reduction of O2 and MnIII/IV (oxyhydr)oxides resulting in decreased O2 levels and increased Mn solubilization along roots. Compared to PV, we found 4-fold lower As translocation to PQ fronds (1611 mg kg−1), 2-fold lower AsV depletion in the PQ rhizosphere, and no AsIII efflux from PQ roots, suggesting that PQ efficiently controls As uptake to avoid toxic As levels in roots. Analysis of root exudates obtained from soil-grown PV showed that As acquisition by PV roots was not associated with phytic acid release. Our study demonstrates that two closely-related As-accumulating ferns have distinct mechanisms for As uptake modulating As cycling in As-rich environments.
  • Drought effects on carbon allocation to resin defences and on resin dynamics in old-grown Scots pine
    Item type: Journal Article
    Rissanen, K.; Hölttä, T.; Bäck, J.; et al. (2021)
    Environmental and Experimental Botany
    Droughts and other rapid changes in abiotic environmental conditions can predispose trees to damage by pest insects and pathogens. For survival of coniferous trees, functional resin-based defences are essential, and it is important to know how they react to changes in environmental conditions at various time scales. We studied the effects of differing water availabilities on resin-based defences in mature Scots pine (Pinus sylvestris) trees in a naturally drought-prone forest within a long-term irrigation experiment. Our objectives were to understand the effects of long-term drought on carbon allocation to resin production and to analyse its influence on resin flow and pressure in comparison to the shorter-term effects of seasonal drought. We tracked carbon allocation to resin after 13C-pulse labelling experiment in late summer 2017 and compared the observed resin dynamics between drought-exposed control trees and irrigated trees from June to August during the dry hot summer of 2018. Dry control trees showed higher allocation of labelled carbon to resin than irrigated trees. Resin pressure was higher in dry control than in irrigated trees with similar water potentials, and resin flow in June was higher in dry control than in irrigated trees with similar crown transparency. Yet, resin pressures of dry control trees in particular decreased with decreasing water availability from June to August. Resin flow was little affected by short-term changes in water availability and mostly associated with crown transparency. We suggest that because of differing timescales of direct drought effects and changes in allocation patterns, dry conditions may support resin-based defences in the long term, but a drought period decreases resin pressure in the short term. © 2021 The Author(s)
Publications 1 - 10 of 23