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The Occurence of delta-Tocopherylquinone in Higher Plants and Its Relation to Senescence.

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delta-Tocopherylquinone (deltaTQ) content was determined in tobacco and yellow maple leaves, green ivy leaves and cactus tissues. It was found that the concentration of delta-TQ was highest in mature or senescent tissues, such as white tobacco leaves (0.02 mumole/g dry wt) while its detection was

PEST sequences from a cactus dehydrin regulate its proteolytic degradation.

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Dehydrins (DHNs) are intrinsically disordered proteins expressed under cellular dehydration-related stresses. In this study, we identified potential proteolytic PEST sequences located at the central and C-terminal regions from the Opuntia streptacantha OpsDHN1 protein. In order to evaluate

[Mescaline and the San Pedro cactus ritual: archaeological and ethnographic evidence in northern Peru].

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BACKGROUND The San Pedro cactus contains the alkaloid mescaline and other derivates of phenethylamine with hallucinogenic properties. This cactus was used throughout history by a number of different pre-Columbine cultures and civilisations that settled in northern Peru. In this article we review the

Biological and molecular characterization of a novel carmovirus isolated from angelonia.

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ABSTRACT A new carmovirus was isolated from Angelonia plants (Angelonia angustifolia), with flower break and mild foliar symptoms, grown in the United States and Israel. The virus, for which the name Angelonia flower break virus (AnFBV) is proposed, has isometric particles, approximately 30 nm in

[Anesthesia in the Inca empire].

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The Incas had no written language and their chroniclers say little about their surgery and nothing about their methods for relieving the pain it caused. It is possible that they did have some form of anesthesia. Available plants that had central effects include maize (which they used in different

Studies on the distribution and properties of a new class of cell division--promoting substances from higher plant species.

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One member of a new class of cell division-promoting substances, which are nicotinamide derivatives, has been found to be present in dividing cells of tobacco and cactus. These plants are taxonomically far removed from one another and from Vinca rosea L., the plant species from which the new

Traditional medicine applied by the Saraguro yachakkuna: a preliminary approach to the use of sacred and psychoactive plant species in the southern region of Ecuador.

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BACKGROUND During the colonial period, the indigenous saraguros maintained their traditions, knowledge, and practices to restore and preserve the health of their members. Unfortunately, many of their practices and medicinal resources have not been documented. In this study, we sought to document the

Elucidating the Distribution of Plant Metabolites from Native Tissues with Laser Desorption Low-Temperature Plasma Mass Spectrometry Imaging.

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Secondary metabolites of plants have important biological functions, which often depend on their localization in tissues. Ideally, a fresh untreated material should be directly analyzed to obtain a realistic view of the true sample chemistry. Therefore, there is a large interest for ambient

A simple and efficient method for isolating small RNAs from different plant species.

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BACKGROUND Small RNAs emerged over the last decade as key regulators in diverse biological processes in eukaryotic organisms. To identify and study small RNAs, good and efficient protocols are necessary to isolate them, which sometimes may be challenging due to the composition of specific tissues of

Hallucinogenic drugs in pre-Columbian Mesoamerican cultures.

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BACKGROUND The American continent is very rich in psychoactive plants and fungi, and many pre-Columbian Mesoamerican cultures used them for magical, therapeutic and religious purposes. OBJECTIVE The archaeological, ethno-historical and ethnographic evidence of the use of hallucinogenic substances in

Nuclear localization of the dehydrin OpsDHN1 is determined by histidine-rich motif.

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The cactus OpsDHN1 dehydrin belongs to a large family of disordered and highly hydrophilic proteins known as Late Embryogenesis Abundant (LEA) proteins, which accumulate during the late stages of embryogenesis and in response to abiotic stresses. Herein, we present the in vivo OpsDHN1 subcellular

A Novel Divergent Geminivirus Identified in Asymptomatic New World Cactaceae Plants.

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Cactaceae comprise a diverse and iconic group of flowering plants which are almost exclusively indigenous to the New World. The wide variety of growth forms found amongst the cacti have led to the trafficking of many species throughout the world as ornamentals. Despite the evolution and

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