Work

Comparative Study on Physiological and Genetic Processes Involved in Cd uptake and Transport of Brassica juncea and Brassica napus in Response to Cd Stress

Year: 2019

Type: article

Abstract: Soil cadmium (Cd) pollution not only affects crop yields and quality, but also endangers human health through the food chain.Brassica napus (B.napus) and Brassica juncea (B.juncea) are important oilseed crops.Obtaining good oil crop cultivars capable of enriching heavy metals and producing oil and is of great significance for soil heavy metal pollution restoration.B. napus and B. juncea were treated with 0, 50 and 200 mg kg -1 Cd for 30 days at the initial flowering stage, respectively.Results indicated that B. napus accumulates more Cd in shoots than B. juncea and the biological enrichment factor (BCF) was higher than that of B. juncea under 50 mg kg -1 Cd stress.The translocation factor (TF) of B. napus was also higher than that of B. juncea under 50 mg kg -1 Cd stress.Additionally, the total percentage of oleic acid and linoleic acid in grains, which are beneficial to human health, were slightly reduced in B. napus.Moreover, Cd stress interfered with mineral nutrients absorption, transport and redistribution.In addition, most of the candidate genes in B. napus were up-regulated, and down-regulated in B. juncea under Cd stress condition.Therefore, B. napus was more tolerant to Cd stress.In conclusion, findings of this study may provide theoretical basis and direction for better understanding the mechanism of Cd uptake and transport.

Source: International Journal of Agriculture and Biology

DOI: 10.17957/ijab/15.1358