Results 211 to 220 of about 12,608 (247)

Breaking physical dormancy in seeds - focussing on the lens

New Phytologist, 2003
○The influence of seasonal factors on the germination of impermeable seeds of Fabaceae was studied. Seeds of 14 herbaceous species were buried for up to 2.5 yr and exposed to natural seasons. At regular intervals, seeds were exhumed and germination was tested in four different temperature regimes.
Carol C Baskin
exaly   +2 more sources

Taxonomy, anatomy and evolution of physical dormancy in seeds

Plant Species Biology, 2000
Abstract Physical dormancy (PY) is caused by a water‐impermeable seed or fruit coat. It is known, or highly suspected, to occur in nine orders and 15 families of angiosperms ( sensu Angiosperm Phylogeny Group 1998), 13 of which are core eudicots. The Zingiberales is the only
Carol C Baskin
exaly   +2 more sources

Physical dormancy in seeds: a game of hide and seek?

New Phytologist, 2013
Summary Historically, ‘physical dormancy’, or ‘hard seededness’, where seeds are prevented from germinating by a water‐impermeable seed coat, is viewed as a dormancy mechanism. However, upon water uptake, resumption of metabolism leads to the unavoidable release of volatile by‐products, olfactory cues that are perceived by seed predators.
Louise Colville, Ilse Kranner, Matthew I Daws   +2 more
exaly   +3 more sources

Physical dormancy in myrtle seed

Scientia Horticulturae, 1976
Abstract The nature of dormancy in seeds of myrtle (Myrtus communis L.) was investigated. Scarification with cold acid or sand paper and soaking in water increased seed germination, whilst stratification, inserting the seeds in boiling water or hot acid treatment decreased the number of germinating seeds.
M. Khosh-Khui, A. Bassiri
openaire   +1 more source

Unravelling the paradox in physically dormant species: elucidating the onset of dormancy after dispersal and dormancy-cycling

Annals of Botany, 2022
Abstract Background For species that produce seeds with a water-impermeable coat, i.e. physical dormancy (PY), it has been widely recognized that (1) seeds shed at a permeable state cannot become impermeable after dispersal; and (2) dormancy-cycling, i.e. a permeable ↔ impermeable transition, does not
openaire   +2 more sources

The Molecular Mechanism of Seed Physical Dormancy in Legume Forage

XXV International Grassland Congress (IGC 2023), 2023
Legume forage seeds have evolved a specific dormancy trait, physical dormancy, to inhibit germination until favorable conditions appear. Physical dormancy is an adaptive trait that widely exists in higher plants and plays a vital role in maintaining natural seed banks.
Chai, Maofeng, Wen, Z., Li, Hui, Wang, Z-Y.   +3 more
openaire   +1 more source

Wet heat as a mechanism for dormancy release and germination of seeds with physical dormancy

Weed Science, 2005
Mexican palo-verde is a serious woody weed in tropical parts of the world. Like many such leguminous species, it has relatively large seeds with hard-seeded (physical) dormancy. It therefore has the potential for long-lived seed banks that are difficult to manage.
Rieks D. van Klinken, Lloyd Flack
openaire   +1 more source

Occurrence of Physical Dormancy in Seeds of Australian Sapindaceae: A Survey of 14 Species in Nine Genera [PDF]

Annals of Botany, 2008
Sapindaceae is one of 16 angiosperm families whose seeds have physical dormancy (PY). However, the extent and nature of PY within this family is poorly known. The primary aims of this study were: (1) to evaluate seed characteristics and determine presence (or not) of PY within nine genera of Australian Sapindaceae; and (2) to compare the frequency of ...
Carol C Baskin, Kathryn J Steadman, Kingsley W Dixon   +2 more
exaly   +7 more sources

Physical Dormancy in Seeds of the Holoparasitic Angiosperm Cuscuta australis (Convolvulaceae, Cuscuteae): Dormancy-breaking Requirements, Anatomy of the Water Gap and Sensitivity Cycling [PDF]

Annals of Botany, 2008
Dormancy in seeds of Cuscuta (Convolvulaceae, tribe Cuscuteae) is due to a water-impermeable seed coat (physical dormancy). In nondormant seeds of several species of this family, bulges adjacent to the micropyle have been identified as the initial route of water entry into seeds (water gap).
K M G Gehan Jayasuriya, Carol C Baskin, Ching-Te Chien   +2 more
exaly   +3 more sources

Physical dormancy in Geraniaceae seeds

Seed Science Research, 2002
Seed dormancy was analysed in Geraniaceae, testing 29,103 seeds of 35 species for seed-coat impermeability to water. Seeds of wild and cultivated species from a number of different climatic/ecological zones (northern Germany, the Canary Islands and South Africa) were investigated.
openaire   +1 more source