Toxic Substances in Crop Plants

Author(s):  
J. P. F. D'Mello ◽  
Carol M. Duffus ◽  
John H. Duffus
Keyword(s):  
Author(s):  
Nikolai Kudelkin

The author studies the issues of legal protection of plants from hazardous organisms including alien species, whose invasions threaten biodiversity. Such a situation determines the complex research object - the relations emerging in the field of protection of plants from hazardous organisms. The problem of protection of plants from hazardous organisms is a complex problem, as it threatens crop plants as well as forests, and flora out of forests. Such relations are regulated at the international and national levels.  The author uses a set of various methods, logical techniques, and means of cognition: general scientific and special legal including the formal legal and comparative legal research methods. At present, there’s a need in Russia for the development of the legislation guaranteeing an appropriate level of protection of crop plants from hazardous organisms, which are not quarantine objects. This problem can be regulated as in a fleshed-out law and together with the questions related to plant quarantine. The development and adoption of the law “On Flora” with a special attention given to the issues of the protection of out-of-forests flora, and their protection from hazardous organisms, are topical for the Russian Federation. The author suggests that, for the purpose of the increase of effectiveness of the struggle against hazardous organisms, the use of toxic substances should be allowed in forests if the use of other means is ineffective, and the potential risk of the use of toxic substances is lower than the expected useful effect.   


1993 ◽  
Vol 31 (2) ◽  
pp. 149 ◽  
Author(s):  
David J. McWeeny
Keyword(s):  

1999 ◽  
Vol 133 (3) ◽  
pp. 243-249 ◽  
Author(s):  
NIGEL G. HALFORD

The most important harvested organs of crop plants, such as seeds, tubers and fruits, are often described as assimilate sinks. They play little or no part in the fixation of carbon through the production of sugars through photosynthesis, or in the uptake of nitrogen and sulphur, but import these assimilated resources to support metabolism and to store them in the form of starch, oils and proteins. Wild plants store resources in seeds and tubers to later support an emergent young plant. Cultivated crops are effectively storing resources to provide us with food and many have been bred to accumulate much more than would be required otherwise. For example, approximately 80% of a cultivated potato plant's dry weight is contained in its tubers, ten times the proportion in the tubers of its wild relatives (Inoue & Tanaka 1978). Cultivation and breeding has brought about a shift in the partitioning of carbon and nitrogen assimilate between the organs of the plant.


Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
J Van Staden ◽  
MG Kulkarni ◽  
GD Ascough ◽  
ME Light
Keyword(s):  

2020 ◽  
pp. 66-72
Author(s):  
Irina A. Piterskikh ◽  
Svetlana V. Vikhrova ◽  
Nina G. Kovaleva ◽  
Tatyana O. Barynskaya

Certified reference materials (CRM) composed of propyl (11383-2019) and isopropyl (11384-2019) alcohols solutions were created for validation of measurement procedures and control of measurement errors of measurement results of mass concentrations of toxic substances (alcohol) in biological objects (urine, blood) and water. Two ways of establishing the value of the certified characteristic – mass consentration of propanol-1 or propanol-2 have been studied. The results obtained by the preparation procedure and comparison with the standard are the same within the margin of error.


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