High irradiance can minimize the negative effect of exogenous sucrose on the photosynthetic capacity of in vitro grown coconut plantlets

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dc.contributor.authorFuentes, G.
dc.contributor.authorTalavera, C.
dc.contributor.authorDesjardins, Y.
dc.contributor.authorSantamaria, J.M.
dc.date.accessioned2014-05-03T08:55:25Z
dc.date.available2014-05-03T08:55:25Z
dc.date.issued2005
dc.description.abstractThere is increasing evidence that the sucrose normally added to the culture medium affects negatively the photosynthetic capacity of plantlets. At the same time, however, sucrose cannot be eliminated from the medium, as it is required for normal in vitro growth. We argue that this is true only under the conventional light conditions of growth-rooms. In the present paper irradiance of growth-rooms was increased 10 times and although the sucrose-inhibitory effect was found at high sucrose concentrations, it was possible to grow coconut (Cocos nucifera L.) plantlets without sucrose. Those plantlets showed both high photosynthetic capacity and comparable in vitro growth to those grown with sucrose in the medium under conventional growth-room irradiance. Nevertheless, the best growth was achieved under mixotrophic conditions where at high irradiance and moderate sucrose concentrations plantlets accumulated 27 % more biomass than plantlets grown without sucrose under high irradiance and 43 and 73 % more biomass than their counterparts at low irradiance with or without sucrose, respectively.en_US
dc.identifier.citationBiologia Plantarum 49 (1): 7-15, 2005en_US
dc.identifier.urihttp://hdl.handle.net/123456789/909
dc.language.isoenen_US
dc.subjectchlorophyll fluorescenceen_US
dc.subjectcarboxylation efficiencyen_US
dc.subjectdark respiration rateen_US
dc.subjectex vitro transferen_US
dc.subjectlight response curveen_US
dc.subjectnet photosynthetic rateen_US
dc.titleHigh irradiance can minimize the negative effect of exogenous sucrose on the photosynthetic capacity of in vitro grown coconut plantletsen_US
dc.typeArticleen_US

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