Document Server@UHasselt >
Research >
Research publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21577

Title: The functional role of the photosynthetic apparatus in the recovery of Brassica napus plants from pre-emergent metazachlor exposure
Authors: Vercampt, Hanne
Koleva, L.
Vassilev, A.
Horemans, Nele
Biermans, Geert
Vangronsveld, Jaco
Cuypers, Ann
Issue Date: 2016
Citation: JOURNAL OF PLANT PHYSIOLOGY, 196-197, p. 99-105
Abstract: Metazachlor is a chloroacetamide herbicide, frequently used in Brassica napus cultivations around the world. Its primary target is the inhibition of very long chain fatty acid biosynthesis. This study included a morphological and physiological screening of hydroponically grown B. napus, exposed to a concentration range of 0, 0.25, 0.50, 0.75 and 1.0 kg metazachlor per hectare. The results indicate that within a month after application, growth and development of B. napus are severely affected by low metazachlor doses. At intermediate metazachlor concentrations, loss of phosphorous and potassium from the plant tissues suggests destabilisation of cellular membranes, which may be a direct consequence of metazachlor application. This membrane instability could be indirectly linked with alterations of electron transport and a reduction of carbon assimilation. At increased metazachlor doses of 0.75 kg a.i. ha(-1), pigment concentrations are strongly reduced. However, chlorophyll fluorescence parameters seem to remain unaffected at metazachlor doses up to 0.75 kg a.i. ha(-1). At a metazachlor concentration of 1.0 kga.i. ha(-1), negative effects are observed on all tested parameters, resulting in limited survival. The results indicate photosynthesis is assured at intermediate metazachlor concentrations for the cost of growth and development. It is clear that photosynthesis plays a key role in the survival strategy of young plants to overcome initially induced chemical stress. (C) 2016 Elsevier GmbH. All rights reserved.
Notes: [Vercampt, H.; Vangronsveld, J.; Cuypers, A.] Hasselt Univ, Ctr Environm Sci, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. [Koleva, L.; Vassilev, A.] Agr Univ Plovdiv, 12 Mendeleev St, Plovdiv 4000, Bulgaria. [Horemans, N.] Belgian Nucl Res Ctr SCK CEN, Biosphere Impact Studies, Boeretang 200, B-2400 Mol, Belgium. [Biermans, G.] FANC, Ravensteinstr 36, B-1000 Brussels, Belgium.
URI: http://hdl.handle.net/1942/21577
DOI: 10.1016/j.jplph.2016.04.001
ISI #: 000376162400011
ISSN: 0176-1617
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

Files in This Item:

Description SizeFormat
published version872.99 kBAdobe PDF

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.