Journal
BIOLOGIA PLANTARUM
Volume 49, Issue 1, Pages 7-15Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-005-7015-6
Keywords
chlorophyll fluorescence; carboxylation efficiency; dark respiration rate; ex vitro transfer; light response curve; net photosynthetic rate
Categories
Ask authors/readers for more resources
There 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available