Summer dormancy in Phalaris aquatica L., the influence of season of sowing and summer moisture regime on two contrasting cultivars

Norton, M. R., Lelievre, F. and Volaire, F. (2012) Summer dormancy in Phalaris aquatica L., the influence of season of sowing and summer moisture regime on two contrasting cultivars. Journal of Agronomy and Crop Science, 198 1: 1-13. doi:10.1111/j.1439-037X.2011.00482.x


Author Norton, M. R.
Lelievre, F.
Volaire, F.
Title Summer dormancy in Phalaris aquatica L., the influence of season of sowing and summer moisture regime on two contrasting cultivars
Formatted title
Summer dormancy in Phalaris aquatica L., the influence of season of sowing and summer moisture regime on two contrasting cultivars
Journal name Journal of Agronomy and Crop Science   Check publisher's open access policy
ISSN 0931-2250
1439-037X
Publication date 2012-02-01
Year available 2011
Sub-type Article (original research)
DOI 10.1111/j.1439-037X.2011.00482.x
Open Access Status DOI
Volume 198
Issue 1
Start page 1
End page 13
Total pages 13
Place of publication Berlin, Germany
Publisher Wiley-Blackwell Verlag
Language eng
Formatted abstract
A series of trials to increase understanding of the summer dormancy trait in Phalaris aquatica was conducted. Autumn-sown and younger, spring-sown plants of two cultivars (cvv), known to contrast in expression of summer dormancy, were established and then tested over the following summer under three moisture regimes: long drought; drought + mid-summer storm; or full irrigation. The autumn-sown plants of cv. Atlas PG expressed substantial but incomplete summer dormancy under all moisture regimes and exhibited the characteristic responses including significant growth reduction and herbage senescence. The summer-dormant cv. Atlas PG used 31 mm less soil water over the summer and also began to rehydrate its leaf bases from conserved soil water before the drought broke. The non-dormant cv. Australian grew whenever moisture was applied and also responded to the mid-summer storm with a decline in dehydrin expression in leaf bases, whereas no decline occurred in Atlas PG, presumably because it remained dormant. The irrigated, younger, spring-sown swards of cv. Atlas PG had restrained growth and produced only about 37 % of the herbage of cv. Australian. Drought reduced activity and growth of young plants of both cultivars but while Australian regrew in response to the storm, cv. Atlas PG, grew much less (59 % of Australian) indicating that dormancy, although only partially expressed after spring sowing, was reinforced by summer drought. Australian used more soil water over summer than Atlas PG, and it is suggested that this is why cv Australian is limited to the higher rainfall zones of south-eastern Australia, particularly where soil water holding capacity is limited.
Keyword Carbohydrate
Dehydrin
Drought
Harding grass
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 13 SEP 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Agriculture and Food Sciences
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 12 Feb 2012, 10:14:31 EST by System User on behalf of School of Agriculture and Food Sciences