Measuring dehydration tolerance in pasture grasses to improve drought survival

Norton, M. R., Lelievre, F. and Volaire, F. (2014) Measuring dehydration tolerance in pasture grasses to improve drought survival. Crop and Pasture Science, 65 8: 828-840. doi:10.1071/CP14054


Author Norton, M. R.
Lelievre, F.
Volaire, F.
Title Measuring dehydration tolerance in pasture grasses to improve drought survival
Journal name Crop and Pasture Science   Check publisher's open access policy
ISSN 1836-0947
1836-5795
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1071/CP14054
Open Access Status
Volume 65
Issue 8
Start page 828
End page 840
Total pages 13
Place of publication Clayton, VIC Australia
Publisher CSIRO
Collection year 2015
Language eng
Abstract Cool-season grasses, both annual and perennial, typically employ the strategies of dehydration avoidance and dehydration tolerance to help them to survive extended periods of low soil moisture. Summer dormancy is an extra trait employed by perennial grasses particularly adapted to regions experiencing extended hot, dry summers. Of the three strategies, it appears that least is known about dehydration tolerance. Using and extending a methodology developed for cocksfoot (Dactylis glomerata L.), this study compared a range of cultivars of cocksfoot, tall fescue and phalaris differing in expression of summer dormancy. Both inter- and intra-specific variation in dehydration tolerance was observed, with cocksfoot expressing the trait strongly, whereas it was least evident in phalaris. The trait was more strongly evident in cultivars originating in drier environments, and the ability to express dehydration tolerance appeared to be independent of summer dormancy. It has been confirmed that dehydration tolerance is a powerful drought-survival trait, one that warrants increasing attention in plant breeding programs for drying environments.
Keyword Adaptation
Dactylis glomerata
dehydration avoidance
Festuca arundinacea
Moisture deficit
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2015 Collection
 
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