Journal article
Differences in physiological features associated with aluminum tolerance in Tibetan wild and cultivated barleys
Plant Physiology and Biochemistry, Vol.75, pp.36-44
2014
Abstract
Aluminum (Al) toxicity is a major limiting factor for plant production in acid soils. Wild barley germplasm 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.
Details
- Title
- Differences in physiological features associated with aluminum tolerance in Tibetan wild and cultivated barleys
- Authors/Creators
- H. Dai (Author/Creator)J. Zhao (Author/Creator)I.M. Ahmed (Author/Creator)F. Cao (Author/Creator)Z-H Chen (Author/Creator)G. Zhang (Author/Creator)C. Li (Author/Creator)F. Wu (Author/Creator)
- Publication Details
- Plant Physiology and Biochemistry, Vol.75, pp.36-44
- Publisher
- Elsevier B.V.
- Identifiers
- 991005545123507891
- Copyright
- © 2014 Elsevier Masson SAS.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.473 Soil Phosphorus Dynamics
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science