Anti-mycobacterial bioactivity of non polar compounds from Coleus atropurpureus L. Benth was carried out. An cyclic ester terpenoid, 2’, 5’-dimethyl benzopelargonolactone has been isolated from the chloroform fraction from the leaves of Coleus atropurpureus L. Benth, and its structure was determined by spectroscopic evidences including FTIR and 2D NMR and compared to previous data. The in vitro...

The flowering response of Coleus frederici and Coleus blumei x C. frederici is dependent on the photoperiod; both plants have a critical day length of about 12 hr. The inductive phase, defined as the period when light signals inhibit floral development, started 10 hr after the onset of darkness under 4 and 8-hr photoperiods, and 8 hr after the onset of darkness under a 12-hr photoperiod. Howeve...

0[ This study investigates how the density and size of conspeci_c neighbours a}ected the mortality of established colonies[ Data were from a population of 149Ð299 colonies of the red harvester ant ðPogonomyrmex barbatus "F[ Smith#Ł\ on a 09!ha site\ from 0877 to 0884[ 1[ Colonies are more likely to die as they grow older[ 2[ Small neighbours tend to lower the probability of dying[ 3[ The probab...

Social insects use odors as cues for a variety of behavioral responses, including nestmate recognition. Past research on nestmate recognition indicates cuticular hydrocarbons are important nestmate discriminators for social insects, but other factors are likely to contribute to colony-specific odors. Here we experimentally tested whether external microbes contribute to nestmate recognition in r...

In a time of rapid environmental changes, identification the effects climate warming on charophytes (Characeae, Charophyta) will enable optimization conservation measures, especially for extremely rare species. Lychnothamnus barbatus is one rarest worldwide, which has decreased in number occupied sites over last century. However, recolonization former been observed recent years (e.g. Lake Kuźni...

Abstract Plectranthus barbatus Andrews (Lamiaceae) is widely distributed in the world and has a range of popular therapeutic indications. This work aimed to evaluate phytochemical characterization two leaf extracts P. barbatus, their antimicrobial, antineoplastic immunomodulatory potential. After collection, herborization obtainment aqueous extract (PBA) acetone:water 7:3 organic (PBO), was per...

We quantified seed dispersal in a guild of Sonoran Desert winter desert annuals at a protected natural field site in Tucson, Arizona, USA. Seed production was suppressed under shrub canopies, in the open areas between shrubs, or both by applying an herbicide prior to seed set in large, randomly assigned removal plots (10-30 m diameter). Seedlings were censused along transects crossing the repro...