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

Shufeng Wang; Jingchao Wang; Juanjuan Sun; Zhongchun Xiao; Shengting Li; Zhen Zhang; Jiana Li; Feng Luo; Nannan Li

doi:10.17957/IJAB/15.1358

Shufeng Wang Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Jingchao Wang Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Juanjuan Sun Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Zhongchun Xiao Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Shengting Li Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Zhen Zhang Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Jiana Li Academy of Agricultural Science, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Feng Luo Chongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

Nannan Li Academy of Agricultural Science, Southwest University,Beibei, Chongqing 400715,People's Republic of ChinaChongqing Key Lab of Bioresource for Energy, College of Resources and Environment, Southwest University,Beibei, Chongqing 400715,People's Republic of China

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.