Recent Posts

Single seeds exhibit transcriptional heterogeneity during secondary dormancy induction (Plant Physiol)

Secondary dormancy (SD) of seeds is a natural strategy that allows survival of the plant in environments with unfavourable climatic conditions. However, in Arabidopsis, a variance of dormancy depth in between identical seeds can be explained by population-based threshold models. This single-seed variability…

Oxidant system and ABA drive germination in seeds of palm species with differences in desiccation tolerance ($) (Seed Sci Res)

Palms are a taxonomically and ecologically diverse group. This wide variety is also reflected in their seeds, with their species showing all combinations of dormancy and desiccation tolerance behaviors. Yet, comparative studies of their germination physiology are relatively scarce. In this paper, Santos…

Review: Fire-released seed dormancy - a global synthesis (Biol. Rev)

In 1991, Jon E. Keely wrote the first review about the role of fire as a dormancy-breaking cue in California's Mediterranean ecosystems. In this review, almost 30 years after Keely's work, Pausas and Lamont provide us with an updated and worldwide vision of the subject. Four dormancy syndromes and their…

Seed dormancy in space and time: global distribution, paleo- and present climatic drivers and evolutionary adaptations ($) (New Phytol.)

Seed dormancy is widely recognized as a key mechanism to ensure that germination takes place under the most suitable conditions. Such is its importance that multiple studies have described the morphological, physiological, and genetic mechanisms behind it, yet its global distribution and the past and…

Review: The great diversity in kinds of seed dormancy (Seed Sci. Res.) ($)

In 1967, Marianna G. Nikolaeva presented the first detailed system to classify seed dormancy based on its causes and the conditions required to break it. Later in 2004, Jerry and Carol Baskin devised a hierarchical classification system based on Nikolaeva’s proposal, which has been widely used by seed…

A seed coat-specific β-ketoacyl-CoA synthase, KCS12, is critical for preserving seed physical dormancy ($) (Plant Physiol.)

Physical dormancy is a dormancy class caused by a water-impermeable cell layer that prevents seed water uptake. Despite being present in several families, its molecular basis has seldom been addressed. Here, Chai and colleagues identify a β-ketoacyl-CoA synthase (KCS) –one of the enzymes that participate…

The seed germination spectrum of alpine plants ($) (New Phytol.)

Alpine ecosystems include all the environments found above the treeline, the maximum elevation where trees can grow. These environments are known for their low temperatures, unstable substrates, and short growing seasons. However, while germination studies in this ecosystem can be traced back to…

Distribution of seed dormancy classes across a fire-prone continent: effects of rainfall seasonality and temperature (Ann. Bot.)

Seed dormancy controls germination so that it occurs under the most suitable conditions. Different dormancy classes achieve this by allowing germination in response to distinct environmental cues. In fire-prone ecosystems, species with physically dormant (PY) seeds benefit from fire since it breaks their…

The first dormancy profile for a tropical montane forest community (Plant Biol.) ($)

Seed dormancy is a crucial mechanism to synchronize germination with the most suitable environmental conditions. Therefore, assessing its prevalence at the community level allows us to understand how plants adapt to their local environment. In this paper, Athugala and colleagues build the first dormancy…