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Measurement of summer dormancy in temperate perennial pasture grasses Inra
Norton, M.R.; Lelièvre, F.; Fukai, S.; Volaire, F..
The search to improve drought survival in temperate perennial grasses has led to a renewed interest in summer dormancy andhowto quantify it. This endogenously controlled trait, found in some temperate perennial grasses, is associated with drought that normally occurs in summer. While cessation of leaf growth and senescence of herbage occurs in all grasses in response to drought, it is under summer irrigation that these same responses are observed only in summer-dormant germplasm and hence the trait can be identi.ed in germplasm. Across the spectrum from completely summer-dormant to non-dormant, there is a range of expression. Our objective here is to highlight differences in characteristics of indices which measure summer dormancy and to identify aspects...
Tipo: Journal Article Palavras-chave: DORMANCE ESTIVALE; GRAMINEE FOURRAGERE PERENNE; COMPORTEMENT ESTIVAL DROUGHT RESISTANCE; COOL-SEASON GRASSES; ORCHARD GRASS; LOLIUM ARUNDINACEUM; HARDINGGRASS.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010556c5fc1&uri=/notices/prodinra1/2010/02/
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Perennial grasses in rainfed Mediterranean farming systems - current and potential role Inra
Lelièvre, F.; Norton, M.R.; Volaire, F..
Cette revue présente un bilan du développement récent des graminées pérennes dans les régions méditerranéennes sèches, par type de système agraire. Peu de cultivars (cvs) sont inscrits et seuls ceux inscrits en France et en Australie ont des semences commercialisées. I/s ne sont significativement utilisés qu'en zones sub-tempérées. A l'avenir, les mélanges graminée-légumineuse à deux ou plusieurs composants s'imposent pour optimiser la production animale et les bénéfices environnementaux, tous deux contribuant au revenu des exploitations. Les cvs existants sont adaptés à une pluviométrie annuelle > 500 mm avec déficit climatique cumulé Mai-Septembre < 700 mm. L'utilisation croissante des pérennes fourragères en couverture dans des systèmes culturaux...
Tipo: Conference Paper Palavras-chave: GRAMINEES PERENNES; MELANGES GRAMINEE-LEGUMINEUSE; PLANTE DE COUVERTURE; PERENNITE PERENNIAL GRASSES; GRASS-LEGUME MIXTURES; PASTURES; FARMING SYSTEMS; MEDITERRANEAN C1IMATES; DROUGHT TOLERANCE; PERENNIALITY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201024ea786e&uri=/notices/prodinra1/2010/08/
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Summer drought survival strategies and sustainability of perennial temperate forage grasses in mediterranean aereas Inra
Volaire, F.; Norton, M.R.; Lelièvre, F..
Perennial grasslands provide numerous agroenvironmental benefits due to continuous soil cover. In Mediterranean areas, chronic summer drought is expected to increase as a result of climate changes. Plant adaptations that protect meristematic tissues include dehydration delay, dehydration tolerance, and summer dormancy. Summer dormancy can only be reliably tested in plants not subjected to water deficit. Under summer irrigation, complete dormancy is manifested by cessation of growth in association with full senescence of foliage and induced dehydration of leaf bases. Incomplete dormancy occurs when leaf growth is partially constrained and associated with moderate levels of foliage senescence. Summer dormancy is under hormonal control and is induced under...
Tipo: Journal Article Palavras-chave: PRAIRIE PERENNE; DORMANCE ESTIVALE; SURVIE A LA SECHERESSE SUMMER DORMANCY; PERENNIAL GRASSLAND; DROUGHT SURVIVAL.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201084207f34&uri=/notices/prodinra1/2010/08/
Registros recuperados: 3
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