Ecophysiology of Seed Dormancy in the Australian Endemic Species Acanthocarpus preissii (Dasypogonaceae)

Shane Turner, David Merritt, E.C. Ridley, Lucy Commander, J.M. Baskin, C.C. Baskin, Kingsley Dixon

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Background and Aims Seedlings of Acanthocarpus preissii are needed for coastal sand dune restoration in Western Australia. However, seeds of this Western Australian endemic have proven to be very difficult to germinate. The aims of this study were to define a dormancy-breaking protocol, identify time of suitable conditions for dormancy-break in the field and classify the type of seed dormancy in this species.Methods Viability, water-uptake (imbibition) and seed and embryo characteristics were assessed for seeds collected in 2003 and in 2004 from two locations. The effects of GA(3), smoke-water, GA(3) + smoke-water and warm stratification were tested on seed dormancy-break. In a field study, soil temperature and the moisture content of soil and buried seeds were monitored for 1 year.Key Results Viability of fresh seeds was > 90 %, and they had a fully developed, curved-linear embryo. Fresh seeds imbibed water readily, with mass increasing approx. 52 % in 4 d. Non-treated fresh seeds and those exposed to 1000 ppm GA(3), 1 : 10 (v/v) smoke-water/water or 1000 ppm GA(3) + 1 : 10 (v/v) smoke-water/water germinated < 8 %. Fresh seeds germinated to > 80 % when warm-stratified for at least 7 weeks at 18/33 degrees C and then moved to 7/18 degrees C, whereas seeds incubated continuously at 7/18 degrees C germinated to < 20 %.Conclusions Seeds of A. preisii have non-deep physiological dormancy that is released by a period of warm stratification. Autumn (March/April) is the most likely time for warm stratification of seeds of this species in the field. This is the first report of the requirement for warm stratification for dormancy release in seeds of an Australian species.
Original languageEnglish
Pages (from-to)1137-1144
JournalAnnals of Botany
Volume98
Issue number6
DOIs
Publication statusPublished - 2006

Fingerprint

Dasypogonaceae
ecophysiology
seed dormancy
indigenous species
seed stratification
seeds
smoke
dormancy
water
embryo (plant)
viability
dormancy breaking
imbibition
buried seeds
dunes
Western Australia
water uptake
soil temperature
soil water content

Cite this

Turner, Shane ; Merritt, David ; Ridley, E.C. ; Commander, Lucy ; Baskin, J.M. ; Baskin, C.C. ; Dixon, Kingsley. / Ecophysiology of Seed Dormancy in the Australian Endemic Species Acanthocarpus preissii (Dasypogonaceae). In: Annals of Botany. 2006 ; Vol. 98, No. 6. pp. 1137-1144.
@article{d8faf3a4c99e485c9f71f064d2a68a9a,
title = "Ecophysiology of Seed Dormancy in the Australian Endemic Species Acanthocarpus preissii (Dasypogonaceae)",
abstract = "Background and Aims Seedlings of Acanthocarpus preissii are needed for coastal sand dune restoration in Western Australia. However, seeds of this Western Australian endemic have proven to be very difficult to germinate. The aims of this study were to define a dormancy-breaking protocol, identify time of suitable conditions for dormancy-break in the field and classify the type of seed dormancy in this species.Methods Viability, water-uptake (imbibition) and seed and embryo characteristics were assessed for seeds collected in 2003 and in 2004 from two locations. The effects of GA(3), smoke-water, GA(3) + smoke-water and warm stratification were tested on seed dormancy-break. In a field study, soil temperature and the moisture content of soil and buried seeds were monitored for 1 year.Key Results Viability of fresh seeds was > 90 {\%}, and they had a fully developed, curved-linear embryo. Fresh seeds imbibed water readily, with mass increasing approx. 52 {\%} in 4 d. Non-treated fresh seeds and those exposed to 1000 ppm GA(3), 1 : 10 (v/v) smoke-water/water or 1000 ppm GA(3) + 1 : 10 (v/v) smoke-water/water germinated < 8 {\%}. Fresh seeds germinated to > 80 {\%} when warm-stratified for at least 7 weeks at 18/33 degrees C and then moved to 7/18 degrees C, whereas seeds incubated continuously at 7/18 degrees C germinated to < 20 {\%}.Conclusions Seeds of A. preisii have non-deep physiological dormancy that is released by a period of warm stratification. Autumn (March/April) is the most likely time for warm stratification of seeds of this species in the field. This is the first report of the requirement for warm stratification for dormancy release in seeds of an Australian species.",
author = "Shane Turner and David Merritt and E.C. Ridley and Lucy Commander and J.M. Baskin and C.C. Baskin and Kingsley Dixon",
year = "2006",
doi = "10.1093/aob/mcl203",
language = "English",
volume = "98",
pages = "1137--1144",
journal = "Annals of Botany",
issn = "0305-7364",
publisher = "OXFORD UNIV PRESS UNITED KINGDOM",
number = "6",

}

Ecophysiology of Seed Dormancy in the Australian Endemic Species Acanthocarpus preissii (Dasypogonaceae). / Turner, Shane; Merritt, David; Ridley, E.C.; Commander, Lucy; Baskin, J.M.; Baskin, C.C.; Dixon, Kingsley.

In: Annals of Botany, Vol. 98, No. 6, 2006, p. 1137-1144.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ecophysiology of Seed Dormancy in the Australian Endemic Species Acanthocarpus preissii (Dasypogonaceae)

AU - Turner, Shane

AU - Merritt, David

AU - Ridley, E.C.

AU - Commander, Lucy

AU - Baskin, J.M.

AU - Baskin, C.C.

AU - Dixon, Kingsley

PY - 2006

Y1 - 2006

N2 - Background and Aims Seedlings of Acanthocarpus preissii are needed for coastal sand dune restoration in Western Australia. However, seeds of this Western Australian endemic have proven to be very difficult to germinate. The aims of this study were to define a dormancy-breaking protocol, identify time of suitable conditions for dormancy-break in the field and classify the type of seed dormancy in this species.Methods Viability, water-uptake (imbibition) and seed and embryo characteristics were assessed for seeds collected in 2003 and in 2004 from two locations. The effects of GA(3), smoke-water, GA(3) + smoke-water and warm stratification were tested on seed dormancy-break. In a field study, soil temperature and the moisture content of soil and buried seeds were monitored for 1 year.Key Results Viability of fresh seeds was > 90 %, and they had a fully developed, curved-linear embryo. Fresh seeds imbibed water readily, with mass increasing approx. 52 % in 4 d. Non-treated fresh seeds and those exposed to 1000 ppm GA(3), 1 : 10 (v/v) smoke-water/water or 1000 ppm GA(3) + 1 : 10 (v/v) smoke-water/water germinated < 8 %. Fresh seeds germinated to > 80 % when warm-stratified for at least 7 weeks at 18/33 degrees C and then moved to 7/18 degrees C, whereas seeds incubated continuously at 7/18 degrees C germinated to < 20 %.Conclusions Seeds of A. preisii have non-deep physiological dormancy that is released by a period of warm stratification. Autumn (March/April) is the most likely time for warm stratification of seeds of this species in the field. This is the first report of the requirement for warm stratification for dormancy release in seeds of an Australian species.

AB - Background and Aims Seedlings of Acanthocarpus preissii are needed for coastal sand dune restoration in Western Australia. However, seeds of this Western Australian endemic have proven to be very difficult to germinate. The aims of this study were to define a dormancy-breaking protocol, identify time of suitable conditions for dormancy-break in the field and classify the type of seed dormancy in this species.Methods Viability, water-uptake (imbibition) and seed and embryo characteristics were assessed for seeds collected in 2003 and in 2004 from two locations. The effects of GA(3), smoke-water, GA(3) + smoke-water and warm stratification were tested on seed dormancy-break. In a field study, soil temperature and the moisture content of soil and buried seeds were monitored for 1 year.Key Results Viability of fresh seeds was > 90 %, and they had a fully developed, curved-linear embryo. Fresh seeds imbibed water readily, with mass increasing approx. 52 % in 4 d. Non-treated fresh seeds and those exposed to 1000 ppm GA(3), 1 : 10 (v/v) smoke-water/water or 1000 ppm GA(3) + 1 : 10 (v/v) smoke-water/water germinated < 8 %. Fresh seeds germinated to > 80 % when warm-stratified for at least 7 weeks at 18/33 degrees C and then moved to 7/18 degrees C, whereas seeds incubated continuously at 7/18 degrees C germinated to < 20 %.Conclusions Seeds of A. preisii have non-deep physiological dormancy that is released by a period of warm stratification. Autumn (March/April) is the most likely time for warm stratification of seeds of this species in the field. This is the first report of the requirement for warm stratification for dormancy release in seeds of an Australian species.

U2 - 10.1093/aob/mcl203

DO - 10.1093/aob/mcl203

M3 - Article

VL - 98

SP - 1137

EP - 1144

JO - Annals of Botany

JF - Annals of Botany

SN - 0305-7364

IS - 6

ER -