Journal
MICRON
Volume 41, Issue 7, Pages 899-903Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.micron.2010.06.004
Keywords
Ultra-structure; UVB impact; Iridaea; Cell wall
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Funding
- CONICYT
- Education Ministry of Chile
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Iridaea cordata cultivated in the presence of UVB radiation (UVBR) was studied using transmission electron microscopy. Apical segments were cultivated in 0.97 Wm(-2) of UVBR for 40 days, 3 ha day, and compared to a negative control (UVBR absent). UVBR caused modifications, mainly in the cortical cells, including an increased number of cell wall-producing vesicles, in addition to thicker and denser cellular walls, compared to the control. Additionally, cells were observed with an irregular contour and without defined organelles. The increase of cell-wall thickness could be interpreted as an acclimation to UVBR, which could lead to protection from this radiation. (C) 2010 Elsevier Ltd. All rights reserved.
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