AtMYB41 acts as a dual-function transcription factor that regulates the formation of lipids in an organ- and development-dependent manner.

The plant cuticle controls non-stomatal water loss and can serve as a barrier against biotic agents, whereas the heteropolymer suberin and its associated waxes are deposited constitutively at specific cell wall locations. While several transcription factors controlling cuticle formation have been identified, those involved in the transcriptional regulation of suberin biosynthesis remain poorly characterized. The major goal of this study was to further analyse the function of the R2R3-Myeloblastosis (MYB) transcription factor AtMYB41 in formation of the cuticle, suberin, and suberin-associated waxes throughout plant development.

Divergent evolution of the alcohol-forming pathway of wax biosynthesis among bryophytes.

The plant cuticle is a hydrophobic barrier, which seals the epidermal surface of most aboveground organs. While the cuticle biosynthesis of angiosperms has been intensively studied, knowledge about its existence and composition in nonvascular plants is scarce. Here, we identified and characterized homologs of Arabidopsis thaliana fatty acyl-CoA reductase (FAR) ECERIFERUM 4 (AtCER4) and bifunctional wax ester synthase/acyl-CoA:diacylglycerol acyltransferase 1 (AtWSD1) in the liverwort Marchantia polymorpha (MpFAR2 and MpWSD1) and the moss Physcomitrium patens (PpFAR2A, PpFAR2B, and PpWSD1).

Wax biosynthesis in response to danger: its regulation upon abiotic and biotic stress.

The plant cuticle is the first physical barrier between land plants and their terrestrial environment. It consists of the polyester scaffold cutin embedded and sealed with organic, solvent-extractable cuticular waxes. Cuticular wax ultrastructure and chemical composition differ with plant species, developmental stage and physiological state.

Draft Genome Sequence of the Thermophilic Acetogen DSM 23265.

is an endospore-forming, anaerobic, and thermophilic bacterium which was isolated from a terrestrial hydrothermal spring. is able to use humic acid or 10-anthraquinone-2,6-disulfonate as an electron-shuttling compound for growth and Fe(III) reduction. The genome has a size of 2.

Applying signal-detection theory to the study of observer accuracy and bias in behavioral assessment.

We evaluated the feasibility and utility of a laboratory model for examining observer accuracy within the framework of signal-detection theory (SDT). Sixty-one individuals collected data on aggression while viewing videotaped segments of simulated teacher-child interactions. The purpose of Experiment 1 was to determine if brief feedback and contingencies for scoring accurately would bias responding reliably.

Positive inotropic action of Solanaceae glycoalkaloids.

Six glycoalkaloids and one aglycone were tested for cardiotonic activities and compared with K-strophanthoside by use of the isolated frog heart. The decreasing order of potency was as follows: K-strophanthoside greater than tomatine greater than alpha-chaconine=alpha-solanine greater than demissine=commersonine greater than beta-chaconine greater than solanidine. Cardiotonic activity was directly related to the number of sugars in the molecule in which the glycoalkaloids had a common aglycone.

The isolation of Neisseria species from unusual sites.

The isolation of N. gonorrhoeae from the pharynx of four patients and N. meningitidis from the genital tract of six patients is described.

Antibiotic sensitivities of Neisseria gonorrhoeae in the Toronto area.

The antibiotic sensitivity pattern of 3872 isolates of N. gonorrhoeae tested in Toronto from 1969 to 1973 is reviewed. An increase in resistance to both penicillin and tetracycline was noted up to 1971, but no further increase has occurred since then.