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Effects of Temperature and Water Potential on Germination of Horehound (Marrubium vulgare) Seeds from two Australian Localities

Lippai, Attila ; Smith, Paula A. ; Price, Terence V. ; Weiss, John ; Lloyd, Christopher J.

Weed science, 1996-01, Vol.44 (1), p.91-99 [Periódico revisado por pares]

Cambridge, UK: Cambridge University Press

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Título:
Effects of Temperature and Water Potential on Germination of Horehound (Marrubium vulgare) Seeds from two Australian Localities
Autor: Lippai, Attila ; Smith, Paula A. ; Price, Terence V. ; Weiss, John ; Lloyd, Christopher J.
Assuntos: ALCOHOLES ; ALCOOL ; BOTANICA ; BOTANIQUE ; Data smoothing ; GERMINACION ; GERMINATION ; GRAINE ; LABIATAE ; Linear regression ; MALEZAS ; MAUVAISE HERBE ; OSMOSE ; OSMOSIS ; Parametric models ; Pastures ; Plants ; POLIETILENO ; POLYETHYLENE ; POTENTIEL HYDRIQUE ; Rain ; Seed sources ; SEMILLA ; TEMPERATURA ; TEMPERATURE ; Temperature gradients ; TENSION DE ABSORCION ; TRAITEMENT DES SEMENCES ; TRATAMIENTO DE SEMILLAS ; VICTORIA ; Water temperature ; Weed Biology and Ecology
É parte de: Weed science, 1996-01, Vol.44 (1), p.91-99
Notas: 9625106
H60
F62
Descrição: Horehound seed from Wyperfeld (Wyp90 and Wyp93) had optimum germination (98%) at constant 25 C and alternating 30/15 C at 0 MPa, while seed from Swift's Creek (SC93) had optimum germination at constant 25 to 27 C (84%) or alternating 25/15 C (95%). The Generalized Additive Models showed the effects of the three covariates (temperature, temperature difference and water potential) followed a smooth and regular pattern. Germination of SC93, Wyp90 and Wyp93 seed increased (P < 0.001) by 9.1, 6.1, and 11.6% for each degree increase in temperature difference but decreased (P < 0.001) with decreases in water potential by a factor of 4.1, 4.8, and 7.1 respectively, and ceased at −1.5 MPa. At constant temperatures the odds of germination were 27, 19, and 18% smaller for water potentials of 0, −0.25 and −0.5 MPa than when alternating temperatures varied by 15 C.
Editor: Cambridge, UK: Cambridge University Press
Idioma: Inglês

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Effects of Temperature and Water Potential on Germination of Horehound (Marrubium vulgare) Seeds from two Australian Localities

Lippai, Attila ; Smith, Paula A. ; Price, Terence V. ; Weiss, John ; Lloyd, Christopher J.

Cambridge, UK: Cambridge University Press

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