Identification and measurement of summer dormancy in temperate perennial grasses

Norton, M. R., Volaire, F., Lelievre, F. and Fukai, S. (2009). Identification and measurement of summer dormancy in temperate perennial grasses. In: James N Seiber, Crop Science. 1st International Workshop on Summer Dormancy in Grasses - Coping with Increasing Aridity and Heat under Climate Change, Ardmore, OK, U.S.A., (2347-2352). 6-8 April, 2009. doi:10.2135/cropsci2009.06.0319


Author Norton, M. R.
Volaire, F.
Lelievre, F.
Fukai, S.
Title of paper Identification and measurement of summer dormancy in temperate perennial grasses
Conference name 1st International Workshop on Summer Dormancy in Grasses - Coping with Increasing Aridity and Heat under Climate Change
Conference location Ardmore, OK, U.S.A.
Conference dates 6-8 April, 2009
Proceedings title Crop Science   Check publisher's open access policy
Journal name Crop Science   Check publisher's open access policy
Place of Publication Madison, Wis. USA
Publisher Crop Science Society of America
Publication Year 2009
Sub-type Fully published paper
DOI 10.2135/cropsci2009.06.0319
ISSN 0011-183X
Editor James N Seiber
Volume 49
Issue 6
Start page 2347
End page 2352
Total pages 5
Collection year 2010
Language eng
Abstract/Summary There is an apparent increase in frequency of prolonged droughts in regions with Mediterranean climates. This has rekindled interest in the summer dormancy trait for improving drought resistance of temperate perennial pasture grasses. In orchardgrass (Dactylis glomerata L.), tall fescue [Lolium arundinaceum (Schreb.) Darbysh.], and phalaris (Phalaris aquatica L.), identification of the three common drought resistance traits of vascular plants, dehydration avoidance (or delay), dehydration tolerance, and summer dormancy, is often confused. Summer dormancy, the least common of these traits, is found in cool-season grasses from semiarid and arid Mediterranean climates and provides an enhanced level of drought resistance. It is best measured in field-grown plants previously exposed to low winter temperatures and short photoperiods. Those perennial grasses not exhibiting summer dormancy survive drought by avoiding and/or tolerating dehydration and express this as a response to water deficit irrespective of the season. Here we review three summer water-supply environments, full irrigation, midsummer storm, and summer drought, for their precision and repeatability in measuring dormancy. Full irrigation and midsummer storm can be recommended, but measurement of dormancy under prolonged drought caused inconsistencies.
Subjects C1
830403 Native and Residual Pastures
070302 Agronomy
Keyword Simulated Midsummer Storm
2 Contrasting Cultivars
Dactylis-Glomerata L
Festuca-Aruddinacea
Drought Survival
Water Relations
L. Germplasm
Tall Fescue
Phalaris
Cocksfoot
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 23 Nov 2009, 15:24:25 EST