Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 75, Issue -, Pages 36-44Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2013.11.025
Keywords
Aluminum toxicity; ATPase; Citrate and malate secretion; Genotypic difference; Low pH; Tibetan wild barley
Categories
Funding
- National 863 program [2012AA101105]
- National Natural Science Foundation of China [31171488]
- Key Research Foundation of Science and Technology Department of Zhejiang Province of China [2012C12902-2]
Ask authors/readers for more resources
Aluminum (Al) toxicity is a major limiting factor for plant production in acid soils. Wild barley germ-plasm is a treasure trove of useful genes and offers rich sources of genetic variation for crop improvement. Al-stress-hydroponic-experiments were performed, and the physiochemical characteristic of two contrasting Tibetan wild barley genotypes (Al-resistant XZ16 and Al-sensitive XZ61) and Al-resistant cv. Dayton were compared. Ultrastructure of chloroplasts and root cells in XZ16 was less injured than that in Dayton and XZ61. Moreover, XZ16 secreted significantly more malate besides citrate and exhibited less Al uptake and distribution than both of XZ61 and Dayton in response to Al stress, simultaneously maintained higher H+-, Ca2+Mg2+- and total-ATPase activities over XZ61. The protein synthesis inhibitor cycloheximide reduced citrate secretion from XZ16, but not from Dayton. In Tibetan wild barley, our findings highlight the significant correlations between Al tolerance, ATPase activity and citrate secretion, providing some insights into the physiological basis for Al-detoxification. (C) 2014 Elsevier Masson SAS. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available