Jie, Zhan and Twardowska, Irena and Siqi, Wang and Shuhe, Wei and Yanqiu, Chen and Mihajlov, Ljupco (2019) Prospective sustainable production of safe food for growing population based on the soybean (Glycine max L. Merr.) crops under Cd soil contamination stress. Journal of Cleaner Production, 212 (March). pp. 22-36. ISSN 0959-6526
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Abstract
Sustainable food production for steadily growing world's population under the conditions of increasing
environmental stress and soil pollution is a challenge that calls for optimization of farmland resource
management. Soybean (Glycine max. L. Merr) as one of the world's most important protein crops can play
a leading role in addressing global food security provided it fulfills safety requirements, in particular with
respect to Cd level. The aim of this comparative study was elaborating efficient methods for the selection
of soybean cultivars assuring safe Cd contents for food/feed purposes. The pot culture experiment was
conducted using 15 soybean cultivars grown in soil moderately polluted with Cd (1.98 mg kg�1), and in
unpolluted soil (0.15 mg Cd kg�1) as a control. The evaluation was based on the novel Cd concentration/
load trend analysis in plant tissues, Seed Accumulation Factors SAFn and Cd load balance. The soybean
demonstrated fundamentally different response of the same cultivars to low and moderate Cd concentrations
in soil. In cultivars grown in unpolluted soil, besides genetically determined detoxification
factors, important seed protective role played Cd accumulation in stem, leaves and root (Seed Accumulation
Factor SAFn<0.5, Cd load reduction in bean by 25e82%). In the moderately polluted soil, the
most essential effect on Cd accumulation in seed exerted a plant genotype determining Cd flux and
translocation from soil to shoot via root (Enrichment Factor EF < 1), while seed protection by accumulating
Cd in other plant tissues was weak, declining or none (SAFn >0.5 up to >1, whereas Cd load in bean
ranged from �23 to þ11% related to mean value in shoot). Root to shoot flux rate was found to be a
decisive factor in Cd enrichment in soybean seed at the elevated soil pollution with Cd. The efficient
screening for safe Cd content in soybean should be thus based on EF and Cd concentrations in shoot at
the actual target soil pollution level.
© 2018 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Subjects: | Agricultural Sciences > Agricultural biotechnology |
| Divisions: | Faculty of Agriculture |
| Depositing User: | Ljupco Mihajlov |
| Date Deposited: | 21 Dec 2018 10:24 |
| Last Modified: | 22 Jan 2019 12:18 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/20999 |
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