A cnidarian colony can be idealized as a group of feeding polyps connected by tube-like stolons. Morphological variation ranges from runner-like forms with sparse polyp and stolon development to sheet-like forms with dense polyp and stolon development. These forms have typically been considered in a foraging context, consistent with a focus on rates of polyp development relative to stolon elong...

UNLABELLED PREMISE OF THE STUDY Geum reptans reproduces by outcrossing or by the formation of stolons. Sexual and clonal reproduction are not exclusive and occur mostly simultaneously. We developed novel microsatellite primers for this species, which will be used in a study about local adaptation, phenotypic plasticity, and random molecular divergence of alpine plants. • METHODS AND RESULT...

Giant cutgrass ( Zizaniopsis miliacea (Michx.) Doell. & Asch.), a tall emergent grass native to the southeastern United States, was studied in Lake Seminole where it formed large expanding stands, and Lake Alice where it was confined to a stable narrow fringe. In Lake Seminole, the production of functional stolons which were able to become rooted in the substrate resulted in stand expansion of ...

The short growing season and harsh climate found in many parts of Canada necessitates development of both field and greenhouse-based plant production. Gotu kola (Centella asiatica L. Urban) is a member of the Apiaceae family, which is characterized by its constantly growing roots, and long copper-coloured stolons (runners) with long internodes and roots at the base of each node. Also known as I...

Within the monocotyledons the acquisition of the tree habit is enhanced by either primary growth of the axis or a distinctive mode of secondary growth. However, a few arborescent monocotyledons deviate from this pattern in developing trunks up to four meters high that resemble those of tree ferns, i.e., their "woody-fibrous" stems consist mainly of persistent leaf bases and adventitious roots. ...

The genus Baldellia Parl. has always been a complex taxon. Three species and three subspecies have been proposed for the Iberian Peninsula. The morphological variation of this genus in the Iberian Peninsula, Balearic islands and northern Morocco, and its thermo-pluviometric and altitudinal correlation are the focus of this contribution. Twenty-eight morphological variables were examined and sub...

Studies were conducted to determine the role of 3-methylthioproprionic acid (MTPA) in the pathogenicity of potato stem canker, Rhizoctonia solani, and the concentrations required to inhibit growth of R. solani under laboratory and plant house-based conditions. The experiments were laid out in a completely randomized design with five treatments and five replications. The treatments were 0, 1, 2,...

A new species of Alcyonosyllis (Annelida: Syllidae), A. aidae n.sp. is described from Luzón island, Philippines, associated with the alcyonacean Dendronephthya sp. (Nephthydae). This is the sixth known species of this genus living in the Indo-Pacific region. The new species differs from other Alcyonosyllis in having long and slender cirri with the first pair of dorsal cirri slightly thicker tha...

Various transcriptional networks and plant hormones have been implicated in controlling different aspects of potato tuber formation. Due to its broad impact on many plant developmental processes, a role for auxin in tuber initiation has been suggested but never fully resolved. Here, auxin concentrations were measured throughout the plant prior to and during the process of tuber formation. Auxin...

Myriophyllum aquaticum is a non-native aquatic plant that has invaded a range of habitats in the United States and Europe. Myriophyllum aquaticum reduces native species richness at local scales, water quality, habitat quality for fish and wildlife and impacts on human uses. Despite the submersed leaf form, M. aquaticum is not typically a weed problem as water level increases, although little da...