Gamma irradiation on Alstroemeria aurea G. in vitro rhizomes: : an approach to the appropriate dosage for breeding purposes

Gamma irradiation has been widely used as a breeding technique to obtain new cultivars in ornamental species such as Alstroemeria, where several cultivars have been obtained through rhizome radiation. The optimum dosage for an appropriate induction of mutation must be considered for breeding purposes and it depends mainly on plant susceptibility. Thus in this study in vitro cultured rhizomes of Alstroemeria aurea were irradiated with a gamma source using different dosages to evaluate the direct effect produced. Damage and number of rhizome sprouting were observed and recorded during 61 days after irradiation. At the end of this period, rhizomes were weighted and mortality was evaluated. Both mortality and weight increased depending on dosage. All irradiated rhizomes showed early sprouting in comparison with control (0 Gy) and no significant difference in final number of shoots after 61 days among irradiated treatments was observed. Bleaching and necrosis was observed in all irradiated rhizomes and was more evident at higher doses. LD50 was established at about 40 Gy and the optimum dosage to induce mutation was suggested between 2.5 and 5 Gy, when the growth was reduced in 50%, and probably this dosage could be used for breeding purposes.

Lectura singularis [et] aurea d[omi]ni Guidonis pape co[n]sulis dalphinalis super Decretales : in qua singulares [et] aute[n]tice materie exanclantur : cu[m] additionibus, co[n]cordantiis, numeris summariis ante capi. et para. affixis quatenus cu[n]cta el

Marcas tip. de Simon Vincent en port. y en [et]8v (Silvestre. Marques, 266)

Aurea hymnoru[m] expositio : vna cu[m] textu / per Antoniu[m] Nebrissensem recognita ...

Texto a dos col.

Practica Baldi 1525 : perutilis ac vere aurea practica iuris vtriusq[ue] monarche ac luminis d[omi]ni Baldi de Vbaldis de perusio no[n] solum aduocatis, veru[m] procuratoribus, [et] alijs practica[n]tibus summe necessaria, cu[m] additionibus domini Anton

Pie de imprenta tomado del colofón

Catena aurea, seu Continuum in quattor Evangelistas

Tit. tomado de Craviotto, II, 5567

Feedback Inhibition of Chlorophyll Synthesis in the Phytochrome Chromophore-Deficient aurea and yellow-green-2 Mutants of Tomato

The aurea (au) and yellow-green-2 (yg-2) mutants of tomato (Solanum lycopersicum L.) are unable to synthesize the linear tetrapyrrole chromophore of phytochrome, resulting in plants with a yellow-green phenotype. To understand the basis of this phenotype, we investigated the consequences of the au and yg-2 mutations on tetrapyrrole metabolism. Dark-grown seedlings of both mutants have reduced levels of protochlorophyllide (Pchlide) due to an inhibition of Pchlide synthesis. Feeding experiments with the tetrapyrrole precursor 5-aminolevulinic acid (ALA) demonstrate that the pathway between ALA and Pchlide is intact in au and yg-2 and suggest that the reduction in Pchlide is a result of the inhibition of ALA synthesis. This inhibition was independent of any deficiency in seed phytochrome, and experiments using an iron chelator to block heme synthesis demonstrated that both mutations inhibited the degradation of the physiologically active heme pool, suggesting that the reduction in Pchlide synthesis is a consequence of feedback inhibition by heme. We discuss the significance of these results in understanding the chlorophyll-deficient phenotype of the au and yg-2 mutants.

La Legenda aurea com a font del teatre hagiogràfic català de tècnica medieval: un tast comparatiu

En aquest treball ens proposem estudiar la influència de la Legenda aurea de Jacobus de Voragine en el teatre hagiogràfic català de tècnica medieval, en concret en tres de les consuetes del ms. 1139 de la BNC: la de sant Jordi, dedicada a l’episodi de la donzella i el drac; la de la conversió de sant Cristòfol i la de sant Mateu. Comptem amb algunes aproximacions anteriors, com és el cas de les consideracions que féu Josep Romeu en la seua edició de les peces hagiogràfiques d’aquest manuscrit (1957). En aquest sentit, aprofitem les seues indicacions com a punt de partida per a oferir una anàlisi més detallada de la manera en què els drames hagiogràfics adapten algunes de les vides contingudes en l’obra de Voragine. Per no allargar-nos excessivament, ens centrem en aquestes tres consuetes, ja que poden ser prou representatives dels diferents tipus d’adaptació teatral de la Legenda aurea.

Presença anselmiana na Summa aurea de Guilherme de Auxerre

Guilherme de Auxerre (†1231), mestre de teologia na Universidade de Paris, foi o procurador do Papa Gregório IX da Bula Parens scientiarum. O mesmo Papa nomeou-o, por carta de 23 de Abril de 1231, presidente da comissão encarregada de examinar os livros de Aristóteles e depurar a doutrina nociva para a fé cristã neles contida. Escreveu a Summa Aurea, seguindo a estrutura do Liber Sententiarum de Pedro Lombardo, mas com uma ordo disciplinae própria. O seu pensamento inscreve-se na corrente platónico-agostiniana, abrindo-se prudentemente à novidade do aristotelismo. Na senda da fides quaerens intellectum, o mestre Guilherme trata, pela primeira vez numa suma teológica, o problema da relação fé-razão. Assim as rationes humanae, enquanto procuram o conhecimento das coisas divinas, são as rationes theologicae e não as rationes propriae rerum naturalium, tal como o exige a natureza do objecto de conhecimento da ciência teológica. Assumindo a dialéctica da grandeza do Doutor Magnífico, apresenta no início da Summa Aurea quatro provas da existência de Deus, fundadas em argumentos filosóficos. O quarto argumento é do magister Anselmus Cantuariensis: Intelligibile est aliquid quo maius excogitari non potest…. E se lhe perguntarmos pelo papel da razão no âmbito da teologia, ele responde: a razão humana garante, efectivamente, a validade do entendimento reflexivo, e a credibilidade do conhecimento das coisas divinas no quadro de uma escala qualitativa das possibilidades noéticas do ser humano.

Aurea Covadonga : canto epico a la Virgen Santa Maria de Covadonga, ensena de predestinacion y maravilla para la obra titanica de la reconquisita de Espana /

Tema en el concurso: Parva Lyra Maxima Gesta Cano.

Ombrophila aurea; Leotiaceae

Ombrophila aurea Ellis

Summa aurea ... d[omi]ni Guillelmi altissiodore[n]sis in quatuor sententiarum libros ...

Mode of access: Internet.

Las leyes de Toro glosadas : vtilis et aurea glosa d[omi]ni Didaci Castelli doctoris iuris Caesaraei [et] Romani interpretis optimi super leges Tauri ...

Fernández Valladares,

Aurea rudimenta et paratitla vniuersi juris canonici seu Ecclesiastici in octo classes distributa iuxta vulgatam ... deducta & desumpta ab ipsa ecclesia primitiua canonibusue apostolorum ad hodiernum vsque iuris sacri statum adiunctis institutionib. Can. Lancellotti, .../

Mode of access: Internet.

Ierokleous philosophou Ypomnema eis ta ton Pythagoreion epe ta chrysa = Hieroclis philosophi commentarius in aurea Pythagoreorum carmina /

Mode of access: Internet.