Chinese Bulletin of Botany ›› 2013, Vol. 48 ›› Issue (4): 381-388.DOI: 10.3724/SP.J.1259.2013.00381
Previous Articles Next Articles
Meng Dong1,2, Yunlin Zhao1*, Wenzhen Ku1, Xiaomei Zhou1, Yanzi Li1
Received:
Revised:
Online:
Published:
Contact:
Abstract: We used fractionation with cadmium (Cd) treatment to investigate the subcellular distribution of Cd in different organs of Artemisia selengensis. With 30 mg·kg─1 Cd, Cd content was 2 to 3 times higher in leaves than in stems and roots; however, because of the smaller proportion of leaf biomass to total plant biomass, the amount of Cd in leaves was much less than that in stems or roots. Under the stress of this Cd concentration, the subcellular distribution ratio of Cd in leaves was 16:5:1 for cell walls, cytosole, and organelles. The retention of Cd in the cell walls is a major defense mechanism of leaves. The Cd content in cell walls and cytosole increased significantly with increasing additional Cd2+, but Cd content in organelles was still low. The stress of long-term Cd exposure or high Cd concentration causes serious harm or even death to a plant. A large amount of Cd is deposited in root vacuoles, for a detoxification effect for Cd stress.
Meng Dong, Yunlin Zhao, Wenzhen Ku, Xiaomei Zhou, Yanzi Li. Cadmium Accumulation and Subcellular Distribution in Different Organs of Artemisia selengensis[J]. Chinese Bulletin of Botany, 2013, 48(4): 381-388.
Add to citation manager EndNote|Ris|BibTeX
URL: https://www.chinbullbotany.com/EN/10.3724/SP.J.1259.2013.00381
https://www.chinbullbotany.com/EN/Y2013/V48/I4/381