Hormonal Regulation of Dormancy in Developing Sorghum Seeds

Dormancy and germination response of Galbanum seeds (Ferula gummosa) under different hormonal pre-treatments and cold stratification

Extended Abstract Introduction: Galbanum is one of the most important native medicinal plants in Iran, and nowadays the use of its products and derivatives has become widespread in various industries. Thus, the excessive harvest of this species within its natural habitats has increased. Therefore, the species is enlisted as prone to extinction. Due to the lack of information about germination ...

Mechanism and regulation of galactomannan biosynthesis in developing leguminous seeds.

The galactomannans [ l ] are a group of watersoluble polysaccharides which are found in the endosperms of leguminous seeds. (Not all legume seeds are endospermic, but if an endosperm is present it will contain galactomannan). Structurally, legume-seed galactomannans comprise a linear ‘backbone’ of ( 1 + 4)-@-linked u-mannopyranosyl residues, which is laterally substituted by u-galactopyranosyl ...

Environmental regulation of dormancy loss in seeds of Lomatium dissectum (Apiaceae).

BACKGROUND AND AIMS Lomatium dissectum (Apiaceae) is a perennial, herbaceous plant of wide distribution in Western North America. At the time of dispersal, L. dissectum seeds are dormant and have under-developed embryos. The aims of this work were to determine the requirements for dormancy break and germination, to characterize the type of seed dormancy, and to determine the effect of dehydrati...

Induction of secondary dormancy by hypoxia in barley grains and its hormonal regulation

In barley, primary dormant grains did not germinate at 30 °C in air and at 15 °C in an atmosphere containing less than 10% O2, while they germinated easily at 15 °C in air. O2 tension in embryos measured with microsensors was 15.8% at 15 °C but only 0.3% at 30 °C. Incubation of grains at 30 °C is known to induce secondary dormancy in barley, and it was shown here that secondary dormancy was als...

Environmental Regulation of Dormancy Loss in <em>Lomatium dissectum</em> (Apiaceae) Seeds