Enhanced shoot regeneration in nine Australian wheat cultivars by spermidine and water stress treatments

Article


Khanna, Harjeet K. and Daggard, Grant E.. 2001. "Enhanced shoot regeneration in nine Australian wheat cultivars by spermidine and water stress treatments ." Australian Journal of Plant Physiology. 28 (12), pp. 1243-1247. https://doi.org/10.1071/pp01115
Article Title

Enhanced shoot regeneration in nine Australian wheat cultivars by spermidine and water stress treatments

Article CategoryArticle
AuthorsKhanna, Harjeet K. and Daggard, Grant E.
Journal TitleAustralian Journal of Plant Physiology
Journal Citation28 (12), pp. 1243-1247
Number of Pages5
Year2001
PublisherCSIRO Publishing
Place of PublicationAustralia
ISSN0310-7841
1445-4416
Digital Object Identifier (DOI)https://doi.org/10.1071/pp01115
Web Address (URL)https://www.publish.csiro.au/fp/PP01115
Abstract

The regeneration potential of ageing calli initiated from isolated scutella of immature embryos was increased in nine elite Australian cultivars (QT7208, QT9685, QT7709, Kennedy, Lang, Sunvale, Giles, Petrie and Veery) of wheat (Triticum aestivum L.). Firstly, the effects of 4-32 h of dehydration stress on regeneration of 4- to 20-week old calli were evaluated. Cultivars such as Veery, Kennedy and Sunvale showed significant improvement in regeneration from calli up to 12-weeks old that had undergone 16 h of dehydration stress. Secondly, 4- to 20-week old callus cultures were treated with 0.05-5 mM spermidine to evaluate its effect on regeneration. While spermidine had a negative effect on regeneration from 4-week old calli at all tested concentrations (as compared with untreated controls), there was a 3-50% improvement in the regeneration ability of older calli (16- to 20-week old) of all cultivars. Finally, exogenous application of 1 mM spermidine to 16-week old cultures, in combination with 16 h dehydration stress, improved plant regeneration by 10-65% in all nine cultivars.

KeywordsRegeneration; Spermidine; Tissue culture; Water stress; Wheat
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Byline AffiliationsUniversity of Southern Queensland
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