Abstract：
:Plant regeneration from seven-week-old callus cultures derived from mature embryos of several indica rice cultivars was achieved with frequencies of morphogenic calli from 10 to 47%. Three media were tested both for callogenesis and plant regeneration. For 3 of the 7 genotypes examined, the best combination of media for plant regeneration was Murashige & Skoog basal medium: MSC (callogenesis) and MSR (regeneration). The rates of callogenesis were not related to the capacity for plant regeneration. Two genotypes CR-1113 and CR-5272 produced the highest number of regenerated green plants. The results of this study suggest that genetic differences could be directly linked to the ability to regenerate in these plant cultivars.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Valdez M,Muñoz M,Vega JR,Espinoza AMsubject
Has Abstractpub_date
1997-03-01 00:00:00pages
13-21eissn
0034-7744issn
2215-2075journal_volume
44-45pub_type
杂志文章abstract：:This study is based on a subset of plankton samples obtained during an expedition of the German RV Victor Hensen to the Pacific coast of Costa Rica in 1993/94. It aims at the identification of the main plankton taxa for a general description and comparison of the plankton communities of the gulf systems Golfo de Nicoy...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1996-12-01 00:00:00
abstract：:Nutrient dynamics in forest plantations of Azadirachta indica (Meliaceae) established for restoration of degraded lands in Colombia. Azadirachta indica is a tree species which use is steadily increasing for restoration of tropical and subtropical arid and degraded lands throughout the world. The objective of this rese...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2013-06-01 00:00:00
abstract：:Puerulus settlement of the western Atlantic spiny lobster, Panulirus argus, was monitored using modified Witham collectors from December 1996 to March 1998 at seven sites around St. Thomas, U.S. Virgin Islands. A total of 605 pueruli were collected from 553 samples for a catch per unit effort (CPUE) for all sites of 1...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2003-06-01 00:00:00
abstract：:A list of the species and taxa of some pelagic animals from a tropical upwelling region, based on collections made off the coast of Costa Rica is presented. The list includes a total of 224 species, 53 genera and 11 subspecific forms in Cnidaria, Annelida, Mollusca, Artropoda (Crustacea), Chaetognatha and Pisces. ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章,评审
doi：
更新日期：1996-08-01 00:00:00
abstract：:The mangrove forest that fringes the Bon Accord Lagoon measures 0.8 km(2) and is dominated by red mangrove (Rhizophora mangle). This forest forms the landward boundary of the Buccoo Reef Marine Park in Southwest Tobago, and is part of a mangrove-seagrass-coral reef continuum. Biomass and productivity, as indicated by ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2005-05-01 00:00:00
abstract：:J. curcas has been studied in different countries and some interesting agronomic, pharmacological and industrial properties have been reported. More recently, it has been considered an important alternative source for biofuel production. The objective of this study was to establish a long-term method for the maintenan...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2013-09-01 00:00:00
abstract：:Resident and migratory shorebirds inhabit different kinds of wetlands such as lagoons, rivers and seashores among others. In recent years, these areas have been importantly affected by urban, agriculture and touristic activities, such as the Barra de Navidad lagoon, for which little information is available to support...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2012-09-01 00:00:00
abstract：:Habitat modifications such as deforestation and the increase of agricultural activities, have led to uncommon faunal interactions. In Colombia, this condition have caused the secondary contact of subspecies of Ramphocelus flammigerus populations from Cauca valley and the Pacific coast; and some specimens with rumps of...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2012-03-01 00:00:00
abstract：:This study describes temporal and spatial abundance patterns of echinoderm larvae in La Parguera, Puerto Rico. For the temporal study, larvae were sampled by a series of monthly tows taken with a 64 microm mesh net between the new and full moon from April 2005 to July 2006, September 2006 and August 2007. In order to ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2010-10-01 00:00:00
abstract：:Hereditary motor and sensory neuropathy (HMSN) or Charcot-Marie-Tooth disease (CMT) is the most common hereditary illness of the peripheral nervous system. The genetics and the physiopathological aspects of the disease clarified until know, are here summarized. More than twenty genes and ten additional loci have been ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v1i2.15285
更新日期：2004-09-01 00:00:00
abstract：:Anisotremus interruptus is a widely distributed and commercially important species in the Eastern Pacific. A multi-year research on the reproduction of this species was carried out in coastal waters of Jalisco, Mexico. For this purpose, monthly samples were gathered with gillnets of different mesh sizes from 1998-2008...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2012-06-01 00:00:00
abstract：:The fertility life table of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) preying either on Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) caterpillars or on alternative prey Tenebrio molitor L. (Coleoptera: Tenebrionidae) under greenhouse conditions (30 +/- 5 degrees C, 61 +/- 23% RH) were studied. The...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2002-03-01 00:00:00
abstract：:Cicadellidae in one of the best represented families in the Neotropical Region, and the tribe Proconiini comprises most of the xylem-feeding insects, including the majority of the known vectors of xylem-born phytopathogenic organisms. The cytogenetics of the Proconiini remains largely unexplored. We studied males of T...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v59i1.3200
更新日期：2011-03-01 00:00:00
abstract：:Extracts from thirteen species of plants were evaluated by "in vivo" antimalarial test against plasmodium berghei effects. Significant activities were observed in the ethyl acetate and aqueous extracts, elaborated of Cedrela tonduzii leaves, Trichilia havanensis and Trichilia americana barks, Neurolaena lobata and Gli...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1996-08-01 00:00:00
abstract：:During the first six months of 1970 we collected 16 lots of the bivalve Anadara tuberculosa from two areas within the Gulf of Nicoya, Costa Rica. These were examined bacteriologically and the coliform levels found in all of them were such that they had to be graded as not satisfactory for human consumption, according ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1977-07-01 00:00:00
abstract：:Plant litter production and decomposition are two important processes in forest ecosystems, since they provide the main organic matter input to soil and regulate nutrient cycling. With the aim to study these processes, litterfall, standing litter and nutrient return were studied for three years in an oak forest (Querc...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2011-12-01 00:00:00
abstract：:Age and growth parameters were estimated for bigeye tuna Thunnus obesus Lowe, 1839 sampled from China longline fisheries in the central Atlantic Ocean from October 2002 to July 2003 and from August 2004 to March 2005. The von Bertalanffy growth parameters were estimated at L(infinity)=217.9 cm fork length, k=0.23 year...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v57i1-2.11292
更新日期：2009-03-01 00:00:00
abstract：:The semi-arid Caatinga is the fourth largest biome of Brazil, which biota still remains one of the most poorly known, especially with regard to invertebrate groups. In this study, a ground-foraging ant assemblage was surveyed during one year and the effect of rainfall on pitfall trapping was assessed. The study was pe...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v59i4.3426
更新日期：2011-12-01 00:00:00
abstract：:The Andean mountain region of Colombia has a high diversity of fish, with high number of endemic species. To promote their protection and conservation, the knowledge of their general and reproductive biology is necessary. With this aim, the reproductive biology of Saccodon dariensis, in the Peñoles and El Cardal creek...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i2.20691
更新日期：2016-06-01 00:00:00
abstract：:Life history and recruitment information of tropical trees in natural populations is scarce even for important commercial species. This study focused on a widely exploited Neotropical canopy species, Pachira quinata (Malvaceae), at the southernmost, wettest limit of its natural distribution, in the Colombian Amazonia....
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2011-06-01 00:00:00
abstract：:Tagosodes orizicolus Muir (Homoptera: Delphacidae), the endemic delphacid species of tropical America carries yeast-like symbiotes (YLS) in the abdominal fat bodies and the ovarial tissues, like other rice planthoppers of Asia. These YLS are obligate symbiotes, which are transmitted transovarially, and maintain a mutu...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v1i2.15414
更新日期：2004-09-01 00:00:00
abstract：:Centrostephanus coronatus reaches a density of 0.06 individuals/m2 in shallow reef waters in Parque Nacional Marino Ballena, Pacific of Costa Rica, in the same habitat occupied by the urchin Diadema mexicanum. It is the fourth species of diadematoid urchins reported for Costa Rican and a first new report for Central A...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2004-12-01 00:00:00
abstract：:The genus Helcogrammoides comprises three species of small, cryptic shorefishes, H. antarcticus, H. chilensis, and H. cunninghami. All three species inhabit shallow water along exposed rocky coasts. Specimens reported herein extend the known distributions of H. chilensis and H. cunninghami to the vicinity of Lima, Per...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-07-01 00:00:00
abstract：:The impacts of forest fragmentation on both reproductive biology and genetic diversity of native plant species is hardly understood, despite some studies have analyzed this current worldwide problem. Since this constitutes one of the main threats to seasonal semi-deciduous forests in Southeastern Brazil, we investigat...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2014-03-01 00:00:00
abstract：:We studied the composition and seasonal variation of the diet of the capybara (Hydrochaeris hydrochaeris) in the flooded savannas of Caño Limón, Colombia. This was achieved by direct observation of the consumption patterns of these animals. The capybaras only consumed plants, and their diet included 89 species of 22 f...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2003-06-01 00:00:00
abstract：:Two unusual specimens of the grenadier genus Coryphaenoides were collected by the deep-submersible vehicle Johnson Sea-Link off the Galápagos. Unlike any other member of the genus, the snout in these specimens was rounded, non-protruding, naked anteriorly and ventrally, with no tubercular scales marking the terminal a...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-07-01 00:00:00
abstract：:Breast cancer is first in incidence and mortality among Costa Rican women. In 2011 there is a projected 1 071 new cases. We selected 116 patients diagnosed with breast cancer and family history of breast cancer. A detailed family history and epidemiology data was obtained from each patient and a blood sample was proce...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2012-12-01 00:00:00
abstract：:Bottom trawling has been considered a fishing activity that affects and modifies habitats, because of its impacts in species composition and abundance, and the alteration in the structure and function of the eco-system, that generates biodiversity loss. The Northern part of the Gulf of California has been considered a...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2015-09-01 00:00:00
abstract：:The diversity of chondrychthyans in Mexico is described. The fauna is composed by 214 species (111 sharks, 95 rays and 8 chimaeras) and represents 17.3 % of the total number of species recorded worldwide. The families with the highest diversity comprise: Rajidae (14.5 %), Carcharhinidae (12.1 %), Pentanchidae, Triakid...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2016-12-01 00:00:00
abstract：:We surveyed the trophic components in six species of Bahía de Navidad and Bahía de Chamela: Microlepidotus brevipinnis, Caranx caballus, Haemulon flaviguttatum, Lutjanus guttatus, L. argentiventris and Mulloidichthys dentatus. Two main seasonal periods were considered: 1) North Equatorial Counter Current NECC period i...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2010-03-01 00:00:00
