Results 71 to 80 of about 168,082 (284)

Automated extraction of leaf mass per area from digitized herbarium specimens

open access: yesNew Phytologist, EarlyView.
Summary The digitization of vast herbarium collections has made millions of plant specimen images freely available online, which can now be used to generate phenotypic datasets of unprecedented scope. Here, we assess the potential of computer vision tools to automate the extraction of predicted leaf mass per area (LMApred) from digitized herbarium ...
Thais Vasconcelos   +4 more
wiley   +1 more source

Mercado del maíz semilla de exportación [PDF]

open access: yes, 2012
46 p.En este estudio caracterizó el mercado del maíz semilla en Chile. Para tal efecto se especificaron las exportaciones de maíz y sus respectivos precios FOB según empresa exportadora.
Díaz Osorio, José (Prof. Informante)   +2 more
core  

Specimen‐tailored ‘lived’ climate reveals precipitation onset and amount best predict specimen phenology, but only weakly predict estimated reproduction across a clade

open access: yesNew Phytologist, EarlyView.
Summary Herbarium specimens are widely distributed in space and time, thereby capturing diverse conditions. We reconstructed specimen ‘lived’ climate from knowledge of germination cues and collection dates for 14 annual species in the Streptanthus (s.l.) clade (Brassicaceae) to ask: which climate attributes best explain specimen phenological stage and ...
Megan Bontrager   +6 more
wiley   +1 more source

Estudio sobre polinización y biología floral en Passiflora edulis f. edulis Sims, como base para el premejoramiento genético

open access: yesActa Agronómica, 2013
La gulupa es la segunda especie en importancia económica del género Passiflora L., ya que se comercializa como fruta fresca y procesada en todos los continentes.
Juan Sebastián Rendón   +2 more
doaj  

La produccion de semilla genetica de frijol [PDF]

open access: yes, 2017
The different precautions that should be taken when producing good quality seed are indicated as well as the procedure to maintain intravarietal homogeneity. Seed quality components are (1) purity, that is, no seeds of other var. are included; (2) vigor,
Masaya S., P.
core  

Combustion of Soya Oil and Diesel Oil Mixtures for Use in Thermal Energy Production [PDF]

open access: yes, 2008
Producción CientíficaIn August 2005, Spain approved the Plan for Renewable Energy Sources for the period 2005-2010 (P.E.R.), including co-combustion installations. Co-combustion in the P.E.R.
López Romero-Ávila, Enrique José   +4 more
core   +1 more source

Harnessing the benefits of herbarium specimen digitisation for inferring recent and ongoing plant extinctions

open access: yesNew Phytologist, EarlyView.
Summary Evidence for the ongoing biodiversity crisis rests on assessment of a small fraction of described species, with major knowledge gaps for most organisms, including plants. Here, we highlight how digitised herbarium specimens can be used to accelerate and improve estimates of recent and ongoing plant extinctions.
Aelys M. Humphreys   +4 more
wiley   +1 more source

Establecimiento y germinación in vitro de semillas de pitahaya naranja de Churuja (Hylocereus sp.)

open access: yesRevista Agrotecnológica Amazónica
La presente investigación planteó como objetivo establecer y germinar en condiciones in vitro semillas de pitahaya naranja de Churuja (Hylocereus sp.), permitiendo obtener material vegetal joven en condiciones asépticas.
José Maximino Saavedra-García
doaj   +1 more source

Semilla Sintética

open access: yes, 2010
Resulta difícil tratar de determinar el origen de la idea de la producción de semillas sintéticas o artificiales. Es uno de los resultados de la aplicación en la Agricultura de los embriones somáticos descriptos por primera vez en 1958, por Jakob Reinert y por F.C. Steward y colaboradores.
Rey de Badaró, Hebe Yolanda   +1 more
openaire   +1 more source

Detección de enfermedades fungosas y bacteriales transmitidas por semilla, en tres especies hortícolas de la Región del Maule. [PDF]

open access: yes, 1996
Resumen (Spanish, English)80 p.En la región del Maule se dedican 15.000 ha. a la producción de hortalizas, entre las que destacan el cultivo de ají (Capsicum annum), melón (Cucumis melo) y tomate (Lycopersicon esculentum), una de las principales ...
Orellana Tabja, Andrillette del Carmen   +2 more
core  

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