(1907 - 1982)
Escritor y político. Historia de las doctrinas sociales constituye su aporte historiográfico más importante. Fue nombrado Embajador de Cuba ante la OEA, con posterioridad Ministro de Relaciones Exteriores. Se le conoce como El Canciller de la Dignidad.
Agrarian and Fishery Sciences
2004 | Interactions of plants, insects, bacteria and mycorrhizae and their role in mineral nutrition
Main executives entity: University of Havana (UH) (1)
Other entities: National Institute of Agricultural Science (INCA) (2), Agrarian University of Havana (UAH) (3), University of Bayreuth-Germany (4), University of Granada, Spain (5), University of Saint Mary-Canada (6), University Carleton-Canada (7)
Main author: Eduardo Ortega Delgado (1).
Coauthors: From (1) Rosa Rodés García, Loiret F.G., Patricia Ortega Rodés, Guillermo Gálvez Rodríguez, Enrique de la Fuente Fernández,  Milagros Diez-Cabezas Ríos, María Elena Castro Riverón, Ana María Pérez Lamas, Victoriano García Arcia and Froilan Amaya Cadena;  from (2) Lorelí Mirabal Alonso, Aniripsa Felipe Guilarte and Félix Fernández Martín; from (3) Irene Balbín Arias and Ramiro Valdés Carmenate; from (4) Diethelm Kleiner; from (5) Noel Tejera García y Carmen Lluch Plá ; from (6) Zhongmin Dong and Jesús González López ; from (7) Margaret E. McCully and Martín J. Canny
Summary:

It is indispensable to know the biological processes related to plants' mineral nutrition in order to achieve high yields and to preserve the environment. This work provides important knowledge contributions to the interactions among plants, insects and microorganisms associated to mineral nutrition, taking sugar cane as a model.

It was carried out a deep study on the interaction between sugar cane and the nitrogen-fixing bacterium Gluconacetobacter diazotrophicus being determined: new physiologic factors of this interaction; the tolerance of this bacterium to high temperatures, drought and salinity; the bacterium location in sugar cane's apoplast and inside Saccharicoccus sacchari insect, associated to their shafts. This allowed establishing a plant-insect-nitrogen-fixing bacterium interaction model.

It was reported a new endophyte (Pantoea sp.) as another contribution of the work, in cane’s sap, with nitrogen-fixing capacity and tolerance to high temperatures, salinity and pH variations.

15 stumps of endogenous Glomus clarum mycorrhizic fungus were isolated for the first time at international level, some capable of solubilizing phosphates. A new spore disinfection methodology was used for this mycorrhizae type. It was established a plant-mycorrhiza-phosphate solubilizing microorganism interaction model.

The results gave rise to 29 articles in scientific magazines: 4 of great impact, 2 very prestigious, 3 contributions in scientific works with international collectives of authors; 18 theses were defended and had a wide release in international scientific events.

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