Entries by Carlos A. Ordóñez-Parra

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 and colleagues evaluate i) the temperature requirements and ii) ABA, ROS and […]

Machine learning algorithms predict soil seed bank persistence from easily available traits (Appl. Veg. Sci.)

Knowing whether a given plant species forms a persistent soil seed bank is essential to understanding its ecological dynamics, yet soil seed bank studies are both labor-intensive and time-consuming. One could argue that models should help predict this. Still, seed persistence in the soil is shaped by multiple plant and environmental characteristics, so conventional statistical […]

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 potential evolutionary drivers are presented. […]

Opinion. Seed traits and phylogenomics: prospects for the 21st century ($) (Seed Sci)

In August 2021, The International Seed Science Society hosted its 13th International Conference. The meeting had many exciting presentations, including the keynote lecture given by Dr. Hiroyuki Nonogaki, entitled “Seed traits and pylogenomics: perspectives for the 21st Century”. This paper synthesizes the presentation’s main points, providing a solid case for the use of phylogenomics –the […]

Seed microbiota revealed by a large-scale meta-analysis including 50 plant species (New Phytol)

The study of seed microbiota is rapidly getting attention among plant scientists, given its role in modulating seed germination and plant fitness. Here, Simonin and colleagues synthesize the information from 63 studies and provide a thorough overview of this topic’s current state of the art. The authors found that only 50 plants species have at […]

Climate shapes the seed germination niche of temperate flowering plants: a meta-analysis of European seed conservation data (Ann. Bot.)

The seed germination niche is the set of environmental conditions in which a seed can germinate. This collection of requirements is expected to be tuned to the climate each species encounters in its natural habitat, but this hypothesis remains to be formally tested. Here, Carta and colleagues make use of the database from the European […]

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 current environmental drivers behind it have seldom been addressed. Based […]

Review: Embryo-endosperm interactions ($) (Annu Rev Plant Biol)

Angiosperm seed formation is an incredibly complex process, considering that it requires coordinating the development of three distinct structures –the embryo, the endosperm and the seed coat– in a small space. However, Doll and Ingram show us that angiosperms faced this challenge by evolving a complex network of interactions between these compartments, especially between the […]

Shielding the oil reserves: the scutellum as a source of chemical defenses (Plant Physiol.)

If you work with grasses, you are probably familiar with the scutellum –the shield-like cotyledon typical of seeds from these plants. This structure has a renowned role in transferring nutrients to the growing embryo. However, Murphy and colleagues show us that not only does this structure look like a shield, but it also protects the […]