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Publications (19)
Weedy rice, a pervasive and troublesome weed found across the globe, has often evolved through fertilization of rice cultivars with little importance of crop‐weed gene flow. In Argentina, weedy rice has been reported as an important constraint since the early 1970s, and, in the last few years, strains with herbicide‐resistance are suspected to evol...
Underwater germination could risk seedling survival, suggesting the need for control through seed perception of environmental cues. These cues include diurnally alternating temperatures tied to drained soils or shallow water tables. We examined high-amplitude alternating temperatures impact on underwater germination. Besides, the conditions experim...
Weedy rice, a pervasive and troublesome weed found across the globe, has often evolved through feralization of rice cultivars. In the South American Southern Cone region, rice breeding has a contemporary history and weedy rice has been reported as an important constraint since early 1970s; however the origin and genetic composition of Argentinian w...
estomática; PAC 101; PAC 103C. INTRODUCCIÓN El calentamiento global se ha convertido en uno de los problemas más complejos que afectan a la producción agrícola. El cambio climático global ha generado un incremento de la temperatura del aire de 0,5 °C en el siglo XX (Maraseni et al, 2009). Masuduzzaman et al 2016, mencionan que las emisiones globale...
Agricultural weeds are responsible for a large proportion of crop yield losses worldwide. In particular, weedy rice (a closely related weed to rice, Oryza sativa) can cause complete loss of the crop and lead producers to abandon weed-infested fields for years when left unattended. In Argentina, weedy rice invades the whole rice producing area, impo...
El objetivo fue fenotipar por caracteres de grano y panoja una colección o panel de genotipos de arroz compuesto por más de 150 materiales, incluyendo referentes indica y japonica, cultivares y líneas élite de programas de mejoramiento de Argentina, y líneas del Convenio de Vinculación Tecnológica INTA-FLAR (Fondo Latinoamericano para Arroz de Rieg...
In Argentina, the yield potential of rice (Oryza sativa L.) under suboptimal temperatures of temperate regions and during early sowing in tropical regions depends on its low-temperature germinability (LTG) and subsequent cold tolerance at the seedling stage (CTS). This study focused on the phenotyping and identification of contrasting henotypes for...
In wetlands, dormancy may be a key functional trait enabling seeds to avoid underwater germination, which could be lethal for seedling establishment. Our objectives were to find out (i) if shallow dormant (i.e. conditionally dormant) Echinochloa crus-galli seeds from an anaerobic germination resistant accession can break dormancy under hypoxic subm...
Evaluar las modificaciones en largo, ancho y declive de lámina de hoja por la fertilización nitrogenada y los cambios que estos generan en la arquitectura de la planta, intercepción y eficiencia de uso de la radiación en diferentes genotipos de arroz El nitrógeno juega un rol muy importante en la expansión y senescencia del área foliar, como así ta...
La reducción de la distancia entre líneas es una práctica que permite establecer un arreglo espacial de plantas más eficiente, generando incrementos en la productividad del cultivo. BIBLIOGRAFÍA OBJETIVO El arroz en Argentina se siembra a una distancia entrelíneas que fluctúa entre 17cm y 20cm. Esto genera, en etapas iniciales, pérdidas de radiació...
The aim was studied the effect of the change in the spatial arrangement of rice plants with different canopy structure on productivity. Three genotypes with different structure and two distancing (12cm and 20cm). Also, we determined photosynthetically active radiation (IPAR), extinction coefficient of radiation (k), RUE and yield. The decrease in d...
En condiciones de campo, los niveles de eficiencia de implantación (EI) son muy bajos, del orden del 50%-60%. Esta baja eficiencia se debe a diversos factores, entre ellos se encuentra la calidad germinativa de las semillas. Trabajos previos determinaron que el peso específico (PE) es un factor que tiene gran impacto en la calidad de la semilla de...
Although cooperative interactions among kin have been established in a variety of biological systems, their occurrence in plants remains controversial.
Plants of A rabidopsis thaliana were grown in rows of either a single or multiple accessions.
Plants recognized kin neighbours and horizontally reoriented leaf growth, a response not observed when p...
1 EEA Concepción del Uruguay del INTA-gregori.leonardo@inta.gob.ar, 2 EEA Concepción del Uruguay del INTA-pirchi.hector@inta.gob.ar, 3 EEA Concepción del Uruguay del INTA-arguissain.gustavo@inta.gob.ar, 4 EEA Concepción del Uruguay del INTA-mcrepy@agro.uba.com.ar INTRODUCCIÓN MATERIALES Y MÉTODOS Elemento que encierra el potencial genético "El Insu...
In many plant species, the duration of the daily exposure to light (photoperiod) provides a seasonal cue that helps to adjust flowering time to the most favourable time of the year. In Arabidopsis thaliana, the core mechanism of acceleration of flowering by long days involves the stabilisation of the CONSTANS (CO) protein by light reaching the leav...
Green light added to blue light has been proposed to shift cryptochromes from their semireduced active form to the reduced, inactive state. Whether the increased proportion of green light observed under leaf canopies compared to open places reduces cryptochrome-mediated effects remained to be elucidated. Here we report that the length of the hypoco...
GIGANTEA (GI) is involved in the promotion of flowering by long days, in light input to the circadian clock, and in seedling de-etiolation under continuous red light or blue light but not under continuous far-red light (FR). Since red-light effects are mediated largely by phytochrome B and those of FR by phytochrome A (phyA), GI was considered not...
GIGANTEA (GI) is a nuclear protein involved in the promotion of flowering by long days, in light input to the circadian clock, and in seedling photomorphogenesis under continuous red light but not far-red light (FR). Here, we report that in Arabidopsis (Arabidopsis thaliana) different alleles of gi have defects in the hypocotyl-growth and cotyledon...
