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Different physiological characteristics of the cassava plant, which can be used as selection parameters, are reviewed, namely LAI, HI, biomass production, plants with amphistomatic leaves, and C4 photosynthesis. Experience indicates that it is better to select var. showing lower yield reduction u...

Se revisan diferentes caracteristicas fisiologicas de la planta de yuca que se pueden utilizar como parametros de seleccion: IAF, IC, produccion de biomasa, plantas con hojas amfistomatosas y fotosintesis C4. Se enfatiza que se debe tratar de seleccionar var. que presenten menor disminucion en co...


Cock, James H.El-Sharkawy, Mabrouk A.[Caracteristicas fisiologicas para la seleccion de yuca]Caracteristicas fisiologicas para la seleccion de yuca

For seed crops, yield is the cumulative result of both source and sink strength for photoassimilates and nutrients over the course of seed development. Source strength for photoassimilates is dictated by both net photosynthetic rate and the rate of photoassimilate remobilisation from source tissu...


Smith, Millicent R.Rao, Idupulapati M.Merchant, Andrew[Source-Sink Relationships in Crop Plants and Their Influence on Yield Development and Nutritional Quality]Source-Sink Relationships in Crop Plants and Their Influence on Yield Development and Nutritional Quality

Cassava is an important energy-rich food for millions of people in tropical developing countries. The crop has reached that status after thousands of years of evolution under diverse agro-ecosystems, movement of germplasm within and across continents, and more recently, through scientific genetic...


Iglesias F., Carlos ArielBonierbale, Merideth W.El-Sharkawy, Mabrouk A.Lozano T., José CarlosBellotti, Anthony C.Wheatley, Christopher C.[Focusing basic research for cassava varietal improvement]Focusing basic research for cassava varietal improvement

In recent studies of cassava at CIAT, net CO2 uptake rates of 20 to 35 ?mol CO2 m?2 s?1 were commonly observed. Cassava photosynthesis has a high optimum temperature (35°C) and a wide plateau (25 to 35°C) corresponding to the temperature range under which cassava is cultivated. Leaf photosynthesi...


El-Sharkawy, Mabrouk A.Cock, James H.[Photosynthesis of cassava (Manihot esculenta)]Photosynthesis of cassava (Manihot esculenta)
Rao, Idupulapati M.Terry, Norman[Leaf phosphate status and photosynthesis in vivo: Changes in sugar phosphates, adenylates and nicotinamide nucleotide during photosynthetic induction in sugar beet]Leaf phosphate status and photosynthesis in vivo: Changes in sugar phosphates, adenylates and nicotinamide nucleotide during photosynthetic induction in sugar beet
Rao, Idupulapati M.Fredeen, Arthur L.Terry, Norman[Influence of phosphorus limitation on photosynthesis, carbon allocation and partitioning in sugar beet and soybean grown with a short photoperiod]Influence of phosphorus limitation on photosynthesis, carbon allocation and partitioning in sugar beet and soybean grown with a short photoperiod
Cruz, J.L.Alves, A.A.C.LeCain, D.R.Ellis, D.Morgan, J.A.[Effect of elevated CO<sub(2)> concentration and nitrate: Ammonium ratios on gas exchange and growth of cassava (Manihot esculenta Crantz).]Effect of elevated CO<sub(2)> concentration and nitrate: Ammonium ratios on gas exchange and growth of cassava (Manihot esculenta Crantz).

Two contrasting clones of cassava (Manihot esculenta) were reciprocally grafted to test the hypothesis that the yield of cassava is limited by the number of storage roots. Effects of the root sink on leaf gas exchange were also tested under field conditions using a portable infra-red gas analyzer...


Pellet, DEl-Sharkawy, Mabrouk A.[Sink-source relations in cassava: Effects of reciprocal grafting on yield and leaf photosynthesis]Sink-source relations in cassava: Effects of reciprocal grafting on yield and leaf photosynthesis
Roca, William M.Thro, Ann Marie[International Scientific Meeting Cassava Biotechnology Network (1, 1992, Cartagena de Indias, Colombia). Proceedings]International Scientific Meeting Cassava Biotechnology Network (1, 1992, Cartagena de Indias, Colombia). Proceedings

Using the infra-red gas analysis system, the rate of CO2 uptake, transpiration, leaf conductance and water use efficiency were determined on attached leaves of cassava cv. MCol 1522 and CG 403-18, which were grown in pots left outdoors. In the stress treatment, the water was withheld from the fou...


Guzmán R., G.El-Sharkawy, Mabrouk A.[Efecto de la disponibilidad hidrica del suelo sobre la anatomia foliar y el intercambio gaseoso de dos cultivares de yuca (Manihot esculenta Crantz)]Efecto de la disponibilidad hidrica del suelo sobre la anatomia foliar y el intercambio gaseoso de dos cultivares de yuca (Manihot esculenta Crantz)

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