Botany, Ahead of Print. Secretory structures that produce floral rewards have rarely been reported for Annonaceae. We identified a glandular region in Xylopia aromatica (Lam.) Mart., which consisted of a nectary and an elaiophore. This study aimed to describe the structure and secretory process of these glandular structures, which are highly correlated with the reproductive biology of this species

Botany, Ahead of Print. To date, Basidiodendron luteogriseum, the generic type of Basidiodendron (Auriculariales, Basidiomycota) has been treated as a synonym of B. eyrei. Our data show they are not conspecific. The identity of other members of the B. eyrei complex, i.e., B. deminutum and B. grandinioides, is clarified based on morphological and DNA data, and 10 new species are described from Eurasia

Botany, Volume 98, Issue 10, Page 563-573, October 2020. Annual plants in arid regions germinate at different times within a growing season, from early in the season to late, and this may affect post-germination traits. For this study, I tested the effect of germination timing on post-germination life-history traits, including progeny seed germination in the desert annual Erodium laciniatum var. pulverulentum

Botany, Volume 98, Issue 10, Page 555-562, October 2020. The hybrid between diploid Isoetes echinospora and tetraploid I. laurentiana is reported from six sites along the St. Lawrence River near Quebec City. Morphological characteristics and distinguishing features are identified, and the binomial I. ×blondeaui, hyb. nov. is proposed. All occurrences are in biogeographically significant freshwater

Botany, Ahead of Print. The traditional taxonomic affiliation of the diatom Ardissonea crystallina (C. Agardh) Grunow has been recently questioned, as it exhibits a mixture of polar centric and araphid pennate characters. Overall valve architecture and mode of sexual reproduction suggest that araphid pennates are its closest relatives. On the other hand, recovered molecular phylogenies consistently

Botany, Ahead of Print. Recent studies have shown that intraspecific variability is a mechanism by which species respond to environmental heterogeneity, and that intraspecific variation can have large implications for ecological processes. Here, we studied whether there is meaningful intraspecific variation in the ecohydrological traits, biomass allocation, and decomposability in Sphagnum moss, and

Botany, e-First Articles.

Botany, Volume 98, Issue 8, Page 425-437, August 2020. Cactaceae exhibit highly modified spines that are considered to be extrafloral nectaries (EFNs). Despite their ecological and taxonomical relevance in this family, little is known on their structure and function. We have described the anatomy, ontogenesis, and ultrastructure of the secretory glochids in two Opuntioideae species. Young cladodes

Botany, Ahead of Print. Parietaria debilis G. Forst. is gynomonoecious, which is a rare condition in the Urticaceae family and among angiosperms. Apetalous flowers of two different morph types (monoclinous, pistillate) occur in the same inflorescence and are reduced in size and in the number of whorls and of organs per whorl. The objective of this study was to compare the morphogenesis of monoclinous

Botany, Ahead of Print. Secretory cavities produce compounds that protect plants from herbivory and pathogenic microorganisms. These cavities have been reported in many genera. However, there are few studies on secretory cavity ontogeny in the genus Myrcia (Myrtaceae) as well as the effects of luminosity and seasonality on such secretory cavities. Therefore, the objective of this study was to provide

Botany, Ahead of Print. We investigated changes in the growth parameters, sodium accumulation, element composition, and antioxidant enzyme activity of habitat-indifferent Salsola drummondii Ulbr. during the vegetative stage. Our results show that S. drummondii grows very well in salt concentrations up to 500 mmol/L NaCl. There were no significant differences in the water content and biomass of shoots

Botany, Ahead of Print. The need for regionally adapted native grass seed sources for the northern Great Plains has resulted in the commercial release of a range of plant materials, including ecovars™. Ecovars™ are multisite composite populations developed to combine broad genetic diversity from a geographic region. The objective of this study was to determine whether morphological data could be used

Botany, Ahead of Print. We investigated the effects of pipeline construction and environmental factors on the occurrence and characteristics of the endangered plant Halimolobos virgata (Nutt.) O.E. Schultz. The plants were surveyed from 2007 to 2016 at three sites along the Keystone Pipeline in southern Alberta, Canada. Plant height, number of flowers and siliques, as well as microhabitat and climate

Botany, Ahead of Print. Job’s tears (Coix lacryma-jobi L.) is an ancient plant with high nutritional and medicinal value. In this study, using 11 Chinese germplasm resources for Job’s tears, we examined genetic differences among the germplasms and differences in the in vitro antioxidant activities of coixan, and sought to identify inter-relationships between these two variables. We found that the intraspecific

Botany, Ahead of Print. The effects of NaCl and abscisic acid (ABA) on selected bryophyte species were studied. Two phylogenetically unrelated halophyte mosses, namely, Entosthodon hungaricus (Boros) Loeske and Hennediella heimii (Hedw.) R.H. Zander in addition to one model non-halophyte moss, Physcomitrella patens (Hedw.) Bruch & Schimp, were selected to compare the variability in certain biochemical

Botany, Volume 98, Issue 10, Page 603-613, October 2020. Effective population size is a crucial concept of conservation biology. It is reduced by biased sex ratio, consequently causing loss of genetic variation. To evaluate genetic diversity related to gender, and investigate the possible effects of biased sex ratio, we analyzed available microsatellite DNA markers from 120 samples of Populus nigra

Botany, Volume 98, Issue 10, Page 589-602, October 2020. Global surface temperatures are expected to rise throughout the 21st century, and negatively impact plant growth and reproduction. Thus, it is imperative that we deepen our understanding of plant thermotolerance. The examination of native plant species that have evolved tolerance to high temperatures can provide crucial information on how plants

Botany, Volume 98, Issue 10, Page 575-587, October 2020. A robust spore wall was a key requirement for terrestrialization by early plants. Sporopollenin in spore and pollen grain walls is thought to be polymerized and cross-linked to other macromolecular components, partly through oxidative processes involving H2O2. Therefore, we investigated effects of scavengers of reactive oxygen species (ROS) on

Botany, Volume 98, Issue 10, Page 615-621, October 2020. Hypericum scruglii Bacch., Brullo & Salmeri is an endangered endemic plant of Sardinia, and the phloroglucinol compounds identified in this species have been reported to inhibit the activity of the Human Immunodeficiency Virus. Seed banks are a genetic repository that effectively preserve taxa of conservation interest, and they hold knowledge

Botany, Volume 98, Issue 10, Page 545-553, October 2020. Prior exposure to freezing can increase the subsequent freezing tolerance of plants and reduce the severity of injury. However, it is unknown how freezing memory influences plant productivity. We investigated the effects of repeated freezing events over multiple seasons on the biomass of Bromus inermis, Lolium perenne, Festuca rubra, Plantago

Botany, Volume 98, Issue 8, Page 469-478, August 2020. Models of ecological responses to climate warming predict species’ migration towards higher latitudes or elevations. However, models often neglect nonclimatic factors, such as herbivory, which could slow down or prevent geographic range expansion. A previous study in Mont Mégantic National Park (Quebec) found that in one year (2016), browsing by

Botany, Volume 98, Issue 8, Page 459-467, August 2020. Describing the structure and dynamics of hybrid zones has important consequences for our understanding of lineage diversification. Herbarium collections constitute an extensive, though often underutilized, morphological resource that can potentially be leveraged to identify and describe hybrid zones. We demonstrate the use of herbarium collections

Botany, e-First Articles. The hemiparasitic European mistletoe, Viscum album L. (Viscaceae), displays a rapid and remarkable expansion into natural and urban ecosystems in Ukraine. The monitoring and management of this quickly spreading species is becoming increasingly difficult as new plant species become hosts. Unlike other local mistletoe species, the European mistletoe has a broad distribution

Botany, e-First Articles. Parasites necessarily depend on their hosts, but the number of host species used by a parasite varies from one to hundreds. Estimating host range and identifying the preferred host species that influence distributional boundaries and confer greater advantage to the parasite has proven elusive. As well as the confounding effects of sampling effort, characterising host specificity

Botany, Volume 98, Issue 8, Page 449-458, August 2020. Knowledge of optimal conditions for germination facilitates more efficient practices, such as fodder production and restoration. We assessed seeds of three grass species harvested in winter and summer 2018. Germination ability was assessed under two night/day temperature regimes (15 °C/20 °C, 20 °C/30 °C) and two photoperiod regimes (0, 12 h light

Botany, Volume 98, Issue 8, Page 439-448, August 2020. As a rise in sea level is expected with climate change, peat-extracted peatlands located in coastal zones are more vulnerable to saltwater intrusion. Seawater contamination may prevent revegetation of typical bog species (e.g., Sphagnum, ericaceous shrubs) generally intolerant to saline conditions. Spontaneous revegetation was studied in a 27-year

Botany, Volume 98, Issue 8, Page 401-423, August 2020. The umbrella-shaped style of Sarracenia has a flattened and broadened distal half forming an umbrella canopy, and a slender cylindrical proximal half forming an umbrella stalk. The developmental sequence that gives rise to this unique structure has never been studied in detail. Data from light microscopy and scanning electron microscopy showed

Botany, e-First Articles. Many Australian mistletoe species are cryptic, closely resembling their host foliage and overall appearance. Seed-dispersing birds have been proposed as a selective agent for host resemblance, with cryptic mistletoes only located by thoroughly searching through canopies regardless of infection status, boosting mistletoe populations by increasing the frequency of seeds dispersed

Botany, e-First Articles. Mistletoe is increasingly being reported as a horticultural pest, infecting many species grown commercially for fruit, nuts, and other food products. Unlike mistletoe impacts on forestry, the published research on mistletoe in horticulture is scant, with management guidelines reliant on anecdotes, un-replicated trials on unrelated species, and often in different countries

Botany, e-First Articles. The horticulturist Luther Burbank introduced the European mistletoe (Viscum album L.) to Sebastopol, Sonoma County, California, USA, around 1900 to grow as a Christmas ornament crop and tincture for medicinal use. The mistletoe has since spread from the point of introduction on apple to other hardwood trees, especially non-native hardwoods in yards and farms of the region

Botany, e-First Articles. Mistletoes are a group of flowering plants that have developed a parasitic lifeform through complex eco-evolutionary processes. Despite being considered a pest, mistletoes represent a keystone forest resource and are involved in complex plant–plant and plant–animal interactions. Their parasitic lifeform and specialized ecological interactions make mistletoes an ideal model