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1.
Journal of Zhejiang University. Science. B ; (12): 1002-1021, 2021.
Article in English | WPRIM | ID: wpr-922559

ABSTRACT

Mesocotyl elongation is a key trait influencing seedling emergence and establishment in direct-seeding rice cultivation. The phytohormone gibberellin (GA) has positive effects on mesocotyl elongation in rice. However, the physiological and molecular basis underlying the regulation of mesocotyl elongation mediated by GA priming under deep-sowing conditions remains largely unclear. In the present study, we performed a physiological and comprehensive transcriptomic analysis of the function of GA priming in mesocotyl elongation and seedling emergence using a direct-seeding

2.
Perspect. nutr. hum ; 13(2): 123-134, jul.-dic. 2011. ilus, tab
Article in Spanish | LILACS, COLNAL | ID: lil-659422

ABSTRACT

Objetivo: al introducir un alimento al mercado o cambiar algún aspecto se requieren pruebas sensoriales para asegurar su aceptación por el grupo al cual va dirigido el alimento. El objetivo del estudio fue evaluar la preferencia y aceptabilidad de la variedad de arroz IACuba 30 con alto contenido de hierro y zinc por mujeres gestantes, empleando como testigo una variedad de arroz importada que se consume diariamente. Materiales y metódos: se realizó la evaluación de la aceptabilidad de las características organolépticas textura, olor, color y sabor del arroz IACuba 30 comparado con una variedad de consumo local, por 98 gestantes del municipio de Bauta la y aceptabilidad de las características organolépticas, mediante una escala hedónica de cuatro categorías, también se evaluó la preferencia entre estas dos variedades. Resultados: 73,5% de las gestantes participantes en la prueba prefirieron la variedad IACuba 30 frente al testigo (p<0,05). Así mismo, para las cuatro características organolépticas evaluadas (textura, olor, color y sabor), el número de madres que respondieron ''me gusta'' y ''me gusta mucho'' sumaron más de 80% en todos los casos, con diferencias estadísticas entre el valor observado con referencia al esperado (p<0,05). Conclusiones: la variedad IACuba 30 es una buena candidata para promover su consumo en la isla y contribuir con el manejo y prevención de anemia e incrementar el aporte de zinc.


Objective: prior to introducing a new food on the market or changing any aspect of a food, sensory tests with the target group for that food are important. The objective of this study was to test the acceptability and preference for the nutritionally enhanced rice variety IACuba 30, compared with an imported variety that is consumed daily by pregnant women. Materials and methods: the sensory tests were completed with 98 pregnant women in the Bauta municipality. Acceptability of texture, smell, color and taste were assessed for both rice varieties using a hedonic scale with four categories. The preference for one variety over the other was also assessed. Results: 73,5% of the women preferred IACuba 30 over the comparison rice (p<0,05). For the four organoleptic characteristics evaluated (texture, smell, color and taste), more than 80% of women responded ''I like'' and ''I like very much''; the observed values were statistically different from the expected values (p<0,05). Conclusions: results confirm that IACuba 30 is a good candidate to be grown and eaten as a greater nutritional source that can contribute to addressing the problem of anemia and increasing zinc intake on the Island.


Subject(s)
Humans , Oryza , Consumer Behavior , Food Analysis , Food, Fortified , Iron , Zinc
3.
Perspect. nutr. hum ; 13(2): 135-146, jul.-dic. 2011. tab
Article in Spanish | LILACS, COLNAL | ID: lil-659423

ABSTRACT

Objetivo: evaluar las características sensoriales de la variedad tradicional de arroz (Oryza sativa) Azucena, que por su mayor contenido de hierro y zinc podría beneficiar nutricionalmente a poblaciones vulnerables. Materiales y metódos: la evaluación sensorial del arroz Azucena versus una variedad de consumo local, se realizó en cinco comunidades de la Región Autónoma del Atlántico Norte en Nicaragua, mediante la aplicación de dos pruebas a 203 consumidores: aceptabilidad y preferencia. Resultados: con respecto a la aceptabilidad (en una escala de uno a cuatro), Azucena alcanzó un promedio ± DE de 3,1±0,7 para textura, 3,1±0,8 para olor, 3,0±0,9 para sabor y 3,0±0,8 para color. Usando un análisis no paramétrico, se determinó que la aceptabilidad fue mayor (p<0,05) para el testigo en todas las cualidades evaluadas: 3,2±0,8 en textura, 3,2±0,7 en olor, 3,2±0,7 en sabor y 3,3±0,7 en color. La preferencia no fue estadísticamente mayor (56,4%) para el testigo (p=0,23). Conclusiones: el arroz variedad Azucena, por sus caracterÍsticas endógenas y desde el punto de vista sensorial, no tiene una gran aceptación en la población de estudio. Por lo tanto, en caso de lanzarse al comercio se recomiendan campañas estratégicas para promocionar su consumo.


Objective: evaluate the sensory characteristics of Azucena, a traditional landrace rice (Oryza sativa) with elevated iron and zinc levels which can nutritionally benefit vulnerable populations. Materials and methods: in five communities from Nicaragua’s Región Autónoma del Atlántico Norte, Azucena was compared to a local rice variety using sensory evaluation methods. Two tests were applied to 203 household heads: acceptability and preference. Results: for acceptability (on a scale of 1 to 4), Azucena scored a mean ± DE of 3,1±0,7 for texture, 3,1±0,8 for smell, 3,0±0,9 for taste, and 3,0±0,8 for color. Using a non-parametric statistic, acceptability was deemed higher (p<0,05) for the local variety in all of the qualities assessed: 3,2±0,8 for texture, 3,2±0,7 for smell, 3,2±0,7 for taste, and 3,3±0,7 for color. Fifty six percent of consumers preferred the local variety over Azucena; this was not statistically different from the expected 50% (p=0,23). Conclusions: due to its inherent qualities and sensory properties, Azucena was not accepted by the study population. Therefore, if Azucena is to be commercially released in Nicaragua, strategic campaigns are recommended to promote its consumption.


Subject(s)
Humans , Food, Fortified , Food Analysis , Food Preferences , Food Technology , Oryza
4.
Perspect. nutr. hum ; 13(2): 147-160, jul.-dic. 2011. tab
Article in Spanish | LILACS, COLNAL | ID: lil-659424

ABSTRACT

Objetivo: evaluar si existen diferencias sensoriales estadísticamente significativas entre una variedad de arroz mejorado nutricionalmente con hierro y zinc, variedad IDIAP Santa Cruz 11, y otra usada comúnmente por la población. Materiales y metódos: fue desarrollado en tres comunidades rurales, donde el Patronato del Servicio Nacional de Nutrición desarrolla actividades por medio de las granjas autosostenibles. Primero se realizó una encuesta sociodemográfica a cada participante. El arroz fue preparado y servido tibio, de manera que sus características fueran mejor apreciadas. En cada comunidad 30 madres de familias participaron en la evaluación. Para el análisis sensorial se utilizó la prueba discriminativa triangular, en la que las madres de familia debían identificar la muestra diferente. Los datos obtenidos fueron sometidos a pruebas estadísticas de Chi Cuadrado. Resultados: la encuesta sociodemográfica demostró que las madres de familia en este estudio son productoras y consumidoras de arroz y que viven por debajo de la línea de pobreza. Los resultados de la prueba sensorial indican que no se encontraron diferencias significativas (p>0,05) entre el arroz biofortificado y el de consumo local. Conclusiones: al no encontrar diferencias sensoriales estadísticamente significativas, se puede esperar que la variedad de arroz IDIAP Santa Cruz 11 sea aceptada por la comunidad. Sería conveniente realizar pruebas de aceptación en otras regiones de Panamá.


Objective: to evaluate the existence of significant sensory differences between IDIAP Santa Cruz 11, a high-iron and -zinc variety, and another commonly used by the population. Materials and methods: this study was carried out in three rural communities where the Nutrition Board implements activities through self-sustaining farms. First, a demographic survey was administered to each participant. The rice was prepared and served warm, so that its features were better appreciated. In each community 30 women heads of householeds participated in the evaluation. The triangle test, a discriminatory sensory method, was applied whereby women had to identify the different sample. The data obtained were subjected to statistical testing with chi square. Results: the demographic survey showed that the women are rice producers and consumers who live below the poverty line. From the sensory test, there was no significant difference (p>0,05) between the biofortified rice and local variety. Conclusions: Since there were no statistically significant sensory differences for the rice variety IDIAP Santa Cruz 11, it is expected that this variety would be accepted by the community. It would be appropriate to conduct acceptance testing in other regions of Panama.


Subject(s)
Humans , Oryza , Consumer Behavior , Food Preferences , Sensation
5.
Genet. mol. biol ; 31(2): 532-538, 2008. ilus, tab
Article in English | LILACS | ID: lil-484993

ABSTRACT

We investigated inheritance and carried out gene fine mapping of aroma in crosses between the aromatic elite hybrid rice Oryza sativa indica variety Chuanxiang-29B (Ch-29B) and the non-aromatic rice O. sativa indica variety R2 and O. sativa japonica Lemont (Le). The F1 grains and leaves were non-aromatic while the F2 non-aroma to aroma segregation pattern was 3:1. The F3 segregation ratio was consistent with the expected 1:2:1 for a single recessive aroma gene in Ch-29B. Linkage analysis between simple sequence repeat (SSR) markers and the aroma locus for the aromatic F2 plants mapped the Ch-29B aroma gene to a chromosome 8 region flanked by SSR markers RM23120 at 0.52 cM and RM3459 at 1.23 cM, a replicate F2 population confirming these results. Three bacterial artificial chromosome (BAC) clones cover chromosome 8 markers RM23120 and RM3459. Our molecular mapping data from the two populations indicated that the aroma locus occurs in a 142.85 kb interval on BAC clones AP005301 or AP005537, implying that it might be the same gene reported by Bradbury et al (2005a; Plant Biotec J. 3:363-370). The flanking markers Aro7, RM23120 and RM3459 identified by us could greatly accelerate the efficiency and precision of aromatic rice breeding programs.

6.
China Biotechnology ; (12)2006.
Article in Chinese | WPRIM | ID: wpr-685972

ABSTRACT

The cloning of promoter is important for studying the genetic engineering and the regulation of gene expression in plants. Two promoters Os772 and Os359, which are predicted to be highly expressed in the endosperm of rice from the EST database were cloned. After construction of the Os772∶∶GUS and Os359∶∶GUS expression vectors, they were transformed into rice. X-Gluc staining of transgenic plants showed that Os772 and Os359 can promote GUS gene expression in matured endosperm but not in root, stem, leaf and flower. This result indicates Os772 and Os359 are two rice endosperm-specific promoters.

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