Global dataset of soil organic carbon in tidal marshes

Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil organic carbon (SOC) stocks provide an important resource for researchers, natural resource managers, and policy-makers working towards the protection, restoration, and valuation of these ecosystems. We collated a global dataset of tidal marsh soil organic carbon (MarSOC) from 99 studies that includes location, soil depth, site name, dry bulk density, SOC, and/or soil organic matter (SOM). The MarSOC dataset includes 17,454 data points from 2,329 unique locations, and 29 countries. We generated a general transfer function for the conversion of SOM to SOC. Using this data we estimated a median (± median absolute deviation) value of 79.2 ± 38.1 Mg SOC ha−1 in the top 30 cm and 231 ± 134 Mg SOC ha−1 in the top 1 m of tidal marsh soils globally. This data can serve as a basis for future work, and may contribute to incorporation of tidal marsh ecosystems into climate change mitigation and adaptation strategies and policies

Somatic embryogenesís and plant regeneration from in vitro culture of nucella of <i>Citrus</i> spp

Se describe un nuevo procedimiento que permite la inducción de embriones somáticos y la regeneración de plantas de Citrus sinensis, C. para disi, C. reticulatay C. limón, mediante el cultivo in vitro de núcelas. Se ensayaron varios medios de cultivo. Para la inducción de embriones, uno de los mejores medios fue el de Murashige y Tucker, adicionado con 5 % de sacarosa. Para la germinación de los embriones se utilizó el medio de Murashige y Skoog con un 3 % de sacarosa. Las plantas obtenidas fueron exitosamente transplantadas al suelo.A new protocol for somatic embryogenesis and plant regeneration from nucella cultures of Citrus sinensis, C. paradisi, C. reticulata and C. limon is described. Various media were tested. Murashige and Tucker médium (with 5 % sucrose) was found to be one of the best for induction of embryos. Murashige and Skoog médium (with 3 % sucrose) was used for germination. Plants were regenerated and successfully transferred to the soil.Facultad de Ciencias Agrarias y Forestale

Somatic embryogenesís and plant regeneration from in vitro culture of nucella of <i>Citrus</i> spp

Se describe un nuevo procedimiento que permite la inducción de embriones somáticos y la regeneración de plantas de Citrus sinensis, C. para disi, C. reticulatay C. limón, mediante el cultivo in vitro de núcelas. Se ensayaron varios medios de cultivo. Para la inducción de embriones, uno de los mejores medios fue el de Murashige y Tucker, adicionado con 5 % de sacarosa. Para la germinación de los embriones se utilizó el medio de Murashige y Skoog con un 3 % de sacarosa. Las plantas obtenidas fueron exitosamente transplantadas al suelo.A new protocol for somatic embryogenesis and plant regeneration from nucella cultures of Citrus sinensis, C. paradisi, C. reticulata and C. limon is described. Various media were tested. Murashige and Tucker médium (with 5 % sucrose) was found to be one of the best for induction of embryos. Murashige and Skoog médium (with 3 % sucrose) was used for germination. Plants were regenerated and successfully transferred to the soil.Facultad de Ciencias Agrarias y Forestale

Synthetic infrared spectra for correlation spectroscopy

As a first step toward the development of a new remote sensing technique that the authors call holographic correlation spectroscopy, they demonstrate that diffractive optics can be used to synthesize the infrared spectra of real compounds. In particular, they have designed, fabricated, and characterized a diffractive element that successfully reproduces the major features f the spectrum of gaseous HF in the region between 3,600 cm{sup {minus}1} and 4,300 cm{sup {minus}1}. The reflection-mode diffractive optic consists of 4,096 lines, each 4.5 {micro}m wide, at 16 discrete depths relative to the substrate (from 0 to 1.2 {micro}m), and was fabricated on a silicon wafer using anisotropic reactive ion-beam etching in a four-mask-level process. The authors envision the use of diffractive elements of this type to replace the cumbersome reference cells of conventional correlation spectroscopy and thereby enable a new class of compact and versatile correlation spectrometers