Resultados de búsqueda - "Oryza sativa"

Epicuticular Wax and Cuticular Resistance in Rice por O'Toole, J.C., Cruz, R.T., SEIBER, J.N.

“…High leaf cuticular resistance has been reported as a component adaptation of plants to drought prone regions, Experiments were conducted to evaluate and characterize the role of epicuticular wax as a component of cuticular resistance to water vapor loss from rice (Oryza sativa L.) leaves. This information is necessary to determine the applicability of including higher cuticular resistance in an upland rice breeding program and to evaluate potential selection methods.Diffusion porometry, electron microscopy, and gas liquid chromatography were employed. …”
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Temporal origin of nitrogen in the grain of tropical wet-season rice por Sheehy, J.E., Mnzava, M., Cassman, K.G., Mitchell, P.L., Ferrer, A.B., Robles, R.P., Pablico, P.

“…The total N content of rice (Oryza sativa L.) plants was measured by growth analysis throughout the duration of the crop and the measurements were used to calculate the rate of total N uptake. …”
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Molecular analysis of a stress-induced cDNA encoding the translation initiation factor, eIF1, from the salt-tolerant wild relative of rice, Porteresia coarctata por Latha, Rangan, Salekdeh, G. Hosseini, Bennett, John, Swaminathan, Monkumbu Sambasivan

“…The halophytic plant, Porteresia coarctata Tateoka, is a close relative of Oryza sativa L., and has the ability to withstand sudden changes in the soil salinity. …”
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Hydraulic properties of rice and the response of gas exchange to water stress por Stiller, Volker, Lafitte, H. Renee, Sperry, John S.

“…We investigated the role of xylem cavitation, plant hydraulic conductance, and root pressure in the response of rice (Oryza sativa) gas exchange to water stress. In the field (Philippines), the percentage loss of xylem conductivity (PLC) from cavitation exceeded 60% in leaves even in watered controls. …”
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An improved method for using a microsatellite in the rice waxy gene to determine amylose class por Bergman, C.J., Delgado, J.T., McClung, A.M., Fjellstrom, R.G.

“…Rice (Oryza sativa L.) breeders must evaluate progeny across multiple years and locations in part due to environmental effects on amylose content, the primary constituent that influences rice end‐use quality. …”
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Sesbania phosphorus requirements when used as biofertilizer for long-term rice cultivation por Ventura, W., Ladha, J.K.

“…In a long‐term trial that compared the performance of azolla (Azolla microphylla Lam.), sesbania (Sesbania rostrata Bremek. and Oberm.), urea, and no fertilizer N on rice (Oryza sativa L.), a progressive decline in the growth of and N accumulation by sesbania was observed after the ninth crop. …”
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Photoperiodically sensitive and insensitive phases of preflowering development in rice por Yin, Xinyou, Kropff, Martin J., Ynalvez, Marcus A.

“…The time interval between sowing and flowering in rice (Oryza sativa L.) comprises three successive phases: a basic vegetative phase (BVP), a photoperiod‐sensitive phase (PSP), and a post‐PSP phase (PPP). …”
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Intraspecific Variation in Sensitivity of UV-B Radiation in Rice por Barnes, Paul W., Maggard, Sharon, Holman, Steven R., Vergara, Benito S.

“…Twenty‐two cultivars of rice (Oryza sativa L.) from diverse origins were grown under greenhouse conditions and exposed to ultraviolet‐B radiation (UV‐B; 280‐320 nm) simulating a 5% reduction in stratospheric ozone in spring for the Philippines (14° N lat.) to evaluate growth and morphological responses to UV‐B. …”
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Improved Semidwarf Rice Lines with Tolerance to Submergence of Seedlings por Mackill, D.J., Amante, M.M., Vergara, B.S., Sarkarung, S.

“…Short‐term submergence of rainfed lowland and deepwater rice (Oryza sativa L.) reduces yields on millions of hectares in South and Southeast Asia. …”
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Inheritance of Leaf Epicuticular Wax Content in Rice por Haque, M. Mahiul, Mackill, David J., Ingram, Keith T.

“…Epicuticular wax content is low in rice (Oryza sativa L.) relative to other crops, but great differences among rice cultivars have been observed, as great as 100%. …”
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Discrimination of 13C Among Upland Rices Having Different Water Use Efficiencies por Dingkuhn, M., Farquhar, G.D., De Datta, S.K., O'Toole, J.C., Datta, SKde

“…Twenty-eight contrasting rice (Oryza sativa L.) cultivars were grown in the Philippines as upland rice under continuous, mild water stress. …”
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Ethylene As an Indicator of Salt Tolerance in Rice por Khan, Anwar A., Akbar, M., Seshu, D.V.

“…Salt accumulation in cultivated and cultivable rice (Oryza sativa L.) and other croplands poses a serious threat to irrigated agriculture. …”
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Inheritance of Root Characters and Their Relations to Drought Resistance in Rice por Ekanayake, I.J., O'Toole, J.C., Garrity, D.P., Masajo, T.M.

“…Hence, the inheritance of six root characters of rice (Oryza sativa L.) was studied using the parents, F1, F2, and F3 populations of the cross IR20✕MGL‐2. …”
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A New Dominant Gene for Resistance to Whitebacked Planthopper in Rice por Fa Wu, Chun, Khush, Gurdev S.

“…The mode of inheritance and allelic relationships of genes for resistance to whitebacked planthopper, Sogatella furcifera (Hbrvath), in 15 resistant cultivars of rice, Oryza sativa L., were studied. One‐leaf stage seedlings were artificially infested with second‐ and third‐instar whitebacked planthopper nymphs. …”
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Comparison Between Free-Choice and No-Choice Seedling Bulk Tests for Evaluating Resistance of Rice Cultivars to the Whitebacked Planthopper por Saxena, R.C., Khan, Z.R.

“…During a screening of rice, Oryza sativa L., cultivars for resistance to the whitebacked planthopper Sogatella furcifera (Horváth) by the routinely used free‐choice seedling bulk test, a significantly higher insect population was observed to move over to the susceptible check cultivar soon after infestation. …”
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Drought Response Of Grain Legumes Under Irrigation Gradient .2. Plant Water Status And Canopy Temperature por Pandey, R.K., Herrera, W. A. T., Pendleton, J.W.

“…A great need exists in semiarid or tropical areas to include food legumes in rice (Oryza sativa L.) based cropping systems during the post monsoon or dry season. …”
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Combining Ability for Yield and Associated Characters in Rice por Shrivastava, M.N., Seshu, D.V.

“…Combining ability for yield and several related traits in rice (Oryza sativa L.), with a major focus on panicle characteristics, were studied in a 15 ✕ 15 diallel cross (excluding reciprocals). …”
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Ancestry of Improved Cultivars of Asian Rice por Hargrove, Thomas R., Coffman, W.R., Cabanilla, Victoria L.

“…Researchers at the International Rice Research Institute (IRRI) studied the genetic diversity of improved Asian cultivars of rice (Oryza sativa L.), focusing on their maternal ancestry because cytoplasmically controlled traits are inherited through the female parents.All cultivars released by late 1979 under the IR designation trace to the same maternal parent ‘Cina,’ which indicates they might carry similar cytoplasm. …”
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Nitrogen leaching and uptake from calcium cyanamide in comparison to urea and calcium ammonium nitrate in an utisol from the humid tropics por Pleysier, J.L., Arora , Y., Juo, A.S.R.

“…Effectiveness of CaCN2 as a N source was also studied in a greenhouse experiment with maize (Zea mays) and upland rice (Oryza sativa) as testing crops. Calcium cyanamide applied one week before sowing of crops was as effective as CAN and urea under conditions of no N leaching. …”
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Enhancing rice water productivity: insights from crop water needs and irrigation in Pakistan por Akbar, G., Sadozai, N. L., Ashraf, Muhammad

“…Excessive irrigation significantly reduces rice (Oryza sativa L.) water productivity in Pakistan. This study evaluated crop water requirements, irrigation trends and water productivity across Pakistan's rice-growing regions. …”
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