Passiflora dorisiae es descrita e ilustrada como una nueva especie del género Passiflora (Passifloraceae) para los bosques de neblina occidentales del noroeste del Perú. P. dorisiae es muy similar a P. lawessonii del Ecuador pero se diferencia en la estructura interna de la flor al poseer un opérculo erecto con la mitad superior filiforme y filamentos pequeños insertos; brácteas glandular-aserradas; lámina 3-lobada en un 1/3-1/4 de su tamaño, glandular-aserrada en la cara interna de la base; peciolo biglandular ocasionalmente con una glándula adicional distal y en su rango geográfico.

Begonia ludwigii Irmscher and B. parcifolia C. DC. are newly recorded for the Peruvian flora, where they occur within the biodiverse Amotape-Huancabamba zone. Both species were originally considered to be endemic to Ecuador. Within Peru, B. ludwigii is reported from four populations in the Departments of Piura, Lambayeque and Cajamarca, while B. parcifolia is reported from three populations in the Departments of Tumbes, Piura and Cajamarca. Descriptions of B. ludwigii and B. parcifolia are provided and their distributions mapped and discussed. Information about their taxonomy and conservation status are also presented.

Passiflora santos-llatasii is described and illustrated as a new species in Passiflora subgenus Decaloba (Passifloraceae). It is endemic to western cloud forests from the Huancabamba Province in Piura Department, in northern Peru. This species is similar to the Brazilian P. pardifolia, but differs mainly in leaves color, bracts size, flower corona –both in color and series number, fruit shape, and distribution of wild populations. Additional information about etymology, ecology, distribution and conservation is added, with discussion of similar species.

Passiflora dorisiae es descrita e ilustrada como una nueva especie del género Passiflora (Passifloraceae) para los bosques de neblina occidentales del noroeste del Perú. P. dorisiae es muy similar a P. lawessonii del Ecuador pero se diferencia en la estructura interna de la flor al poseer un opérculo erecto con la mitad superior filiforme y filamentos pequeños insertos; brácteas glandular-aserradas; lámina 3-lobada en un 1/3-1/4 de su tamaño, glandular-aserrada en la cara interna de la base; peciolo biglandular ocasionalmente con una glándula adicional distal y en su rango geográfico.

Begonia ludwigii Irmscher y B. parcifolia C. DC. se registran para la flora peruana, donde ocurren dentro de la zona biodiversa Amotape-Huancabamba. Ambas especies fueron originalmente consideradas como endémicas de Ecuador. Dentro de Perú, B. ludwigii es reportada de cuatro poblaciones en los Departamentos de Piura, Lambayeque y Cajamarca, mientras que B. parcifolia es reportada de tres poblaciones en los Departamentos de Tumbes, Piura y Cajamarca. Se proporcionan descripciones de B. ludwigii y B. parcifolia y se mapean y discuten sus distribuciones. También se presenta información sobre su taxonomía y estado de conservación.

Passiflora santos-llatasii es descrita e ilustrada como una nueva especie en Passiflora subgénero Decaloba (Passifloraceae). Es endémica de los bosques montanos de neblina occidentales de la provincia de Huancabamba, departamento de Piura, en el noroeste del Perú. Esta especie es similar a P. pardifolia del Brasil pero se diferencian principalmente en el color de las hojas, tamaño de brácteas, corona floral tanto en color como el número de series, forma del fruto, y la distribución de sus poblaciones silvestres. Se añaden datos adicionales sobre su etimología, ecología, distribución, conservación y se discute su parentesco con otras especies afines.

Plant biotechnology is one of the most important tools presently available and methods to genetically manipulate plants to exhibit greater productivity, tolerance to physical and chemical stress, and resistance to pests and diseases have been developed in recent decades. In vitro plant tissue culture has contributed significantly to this purpose. The objective of this study is to apply various techniques developed by in vitro tissue culture in seed germination, meristem culture for virus elimination, micropropagation, conservation, international transfer of germplasm, and induction of various morphogenic processes that lead to the genetic variability known as somaclonal variation. The application of this set of biotechnological techniques, in crops such as cassava, sweet potato, potato, native forest species as Cedrela odorata, Ficus spp. Loxopterygium huasango, and others, sugar cane, r...

Potato plants are often subjected to heat stress during growth and development, resulting in loss of yield and quality. However, the possibility exists that commercially important genotypes show tolerance to heat stress. In this study, we aim to investigate the morphological and physiological effects of moderate conditions of heat stress on tuberization in nine potato genotypes, and how it affects propagation using an ex vitro and in vitro system. The plant material came from the In Vitro Germplasm Bank of the International Potato Center (CIP). The incubation temperatures of the cultures in in vitro and ex vitro conditions were the ambient in the laboratory and greenhouse, respectively. In in vitro system a randomized complete block design was employed in nine genotypes, two treatments: multiplication culture medium and the same culture medium supplemented with 8.0% sucrose and 500 mg/L-...