Esmeralda Judith Cruz-Gutiérrez's research while affiliated with INIFAP Instituto Nacional de Investigaciones Forestales Agricolas y Pecuarias and other places

La planta de zarzamora (Rubus spp.) puede ser propagada en forma sexual o asexual, su reproducción por semilla es generalmente con fines de mejoramiento genético

The Guadalupe cypress (Cupressus guadalupensis S. Watson) is an endangered species included in the list of the NOM-059-SEMARNAT-2010. The presence of wild goats in the habitat has been the greatest threat to the propagation and survival of this species. Therefore, there is a need to generate propagation protocols that facilitate the regeneration of the species. Plant tissue culture offers various possibilities that can facilitate the regeneration of species under some risk. Temporary immersion systems have proven to be an option with various advantages in plant tissue culture, such as increasing the number of seedlings generated and reducing production times, compared to semisolid media. The objective of this chapter is to describe a protocol to propagate Guadalupe cypress tissues in a RITA® temporary immersion system.

Objective: The present study aimed to carry out the analysis of the physical and physiological quality of soursop seeds, since there is very little information on the subject. Design/ Methodology/ Approach: The material was collected at physiological maturity. The seeds were extracted from fruits in commercial maturity. They were subjected to a physical and physiological quality analysis: physical purity, humidity content of the seed, weight of 1000 seeds, integrity test of the seed with the X-ray equipment, evaluation of germination and the evaluation of viability by the tetrazolium method. A completely randomized experimental design was used in all the physical quality variables and tetrazolium tests. Other hand, a completely randomized factorial design (3x7) was used in the germination evaluation. Results: The viability results obtained by the tetrazolium method showed over 59% viable seeds, while in the germination test with the germinative pretreatments only 11.33% germination was obtained in the seeds from which the cover was removed. Findings/ Conclusions: Therefore, it was concluded that the moment of obtaining the plant material is important for its germination.

La seguridad alimentaria de un país está altamente relacionada con la capacidad de conservación de sus recursos genéticos