Stachytarpheta is one of the largest genera Verbenaceae, found mainly in campos rupestres Brazil. We describe a new species, lajedicola, and report for first time occurrence genus limestone outcrops. The species endemic to Caatinga domain, northern Minas Gerais state, growing an open karst formation municipality Matias Cardoso, locally known as Lajedão. Its main diagnostic characteristics are b...

Background: Euphorbia pulcherrima is highly ornamental value of poinsettia flower, which posses colorful bracts and low temperature resistant leave. Its embryos or adventitious buds were cultivated mainly from stems, petioles tender buds. The cultivation seedlings studied firstly for improving the quality Poinsettia. Methods: A rapid reproducible regeneration system leaves stems with has been e...

Polyketide synthase (PKS) enzymatic activities were analyzed in crude protein extracts from cannabis plant tissues. Chalcone synthase (CHS, EC 2.3.1.74), stilbene synthase (STS, EC 2.3.1.95), phlorisovalerophenone synthase (VPS, EC 2.3.1.156), isobutyrophenone synthase (BUS) and olivetol synthase activities were detected during the development and growth of glandular trichomes on bracts. Cannab...

Dendrogramma was the iconic deep-sea animal of 2014, voted among the top-ten new species described that year [1]. The two species described are mushroom shaped animals, diploblastic, with an apparent gastrovascular system that extends from the base of the stalk to bifurcating canals that radiate through the flat disc [2]. The authors could not assign the new genus to any known animal group with...

Pattern patterns, or phyllotaxis, the arrangements of phylla (flowers, leaves, bracts, florets) in the neighborhood of growth tips, have intrigued natural scientists for over four hundred years. Prominent amongst the observed features is the fact that phylla lie on families of alternately oriented spirals and that the numbers in these families belong to subsets {mj} of the integers defined by t...

The organs of a higher plant show two fundamental axes of asymmetry: proximodistal and dorsoventral. Dorsoventrality in leaves, bracts, and petal lobes of Antirrhinum majus requires activity of the PHANTASTICA (PHAN) gene. Conditional mutants revealed that PHAN is also required for earlier elaboration of the proximodistal axis. PHAN was isolated and shown to encode a MYB transcription factor ho...