Physiological basis of salt stress tolerance in rice expressing the antiapoptotic gene SfIAP

Hoang, Thi My Linh, Williams, Brett, Khanna, Harjeet, Dale, James, & Mundree, Sagadevan G. (2014) Physiological basis of salt stress tolerance in rice expressing the antiapoptotic gene SfIAP. Functional Plant Biology, 41(11), pp. 1168-1177.

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Abstract

Programmed cell death-associated genes, especially antiapoptosis-related genes have been reported to confer tolerance to a wide range of biotic and abiotic stresses in dicotyledonous plants such as tobacco (Nicotiana tabacum L.) and tomato (Solanum lycopersicum L.). This is the first time the antiapoptotic gene SfIAP was transformed into a monocotyledonous representative: rice (Oryza sativa L.). Transgenic rice strains expressing SfIAP were generated by the Agrobacterium-mediated transformation method and rice embryogenic calli, and assessed for their ability to confer tolerance to salt stress at both the seedling and reproductive stages using a combination of molecular, agronomical, physiological and biochemical techniques. The results show that plants expressing SfIAP have higher salt tolerance levels in comparison to the wild-type and vector controls. By preventing cell death at the onset of salt stress and maintaining the cell membrane’s integrity, SfIAP transgenic rice plants can retain plant water status, ion homeostasis, photosynthetic efficiency and growth to combat salinity successfully.

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ID Code: 71009
Item Type: Journal Article
Refereed: Yes
Keywords: programmed cell death, terminal doxynucleotidyl transferase d-UTP nick end labelling, TUNEL, Apoptosis, Salinity
DOI: 10.1071/FP13308
ISSN: 1445-4416
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > PLANT BIOLOGY (060700) > Plant Physiology (060705)
Divisions: Current > Research Centres > Centre for Tropical Crops and Biocommodities
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 CSIRO
Deposited On: 05 May 2014 22:06
Last Modified: 08 Nov 2016 13:09

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