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Title: Effect of light quality on the cell integrity in marine alga Ulva pertusa (Chlorophyceae)
Authors: Muthuvelan, B.
Noro, T.
Nakamura, K.
Keywords: Light quality;cell integrity;Ulva pertusa
Issue Date: Mar-2002
Publisher: CSIR
Abstract: A floating sterile mutant of Ulva pertusa was grown in the laboratory under various light conditions: White light (as reference), broadband isoquantic red (600 – 700 nm) and blue (400 – 500 nm) light. The morphological variation of cell organelles of white (WLC), blue (BLC) and red light cultures (RLC) was studied by electron microscopy after 15 days of light treatment with 14: 10 h light and dark photoperiod. The results indicate that blue light is more efficient than the red light in developing the thylakoid architecture of individual cell organelles. The cell maintenance (integrity) process, which is most essential for the cell division and growth, was found to be positively controlled by blue light. Furthermore, the cell morphology of Ulva was relatively well developed in BLC than in RLC and also comparable with WLC. The results suggest that the red part of the light, though not by itself able to support the growth, is not inhibitory either to growth or to the maintenance of cell integrity. However, the energy is not substantial to run other essential metabolic process.
Page(s): 21-25
ISSN: 0379-5136
Appears in Collections:IJMS Vol.31(1) [March 2002]

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