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KMID : 0903620000410060653
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Journal of the Korean Society for Horticultural Science
2000 Volume.41 No. 6 p.653 ~ p.656
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Histological Effects of Simulated Acid Rain on the Necrosis of Arabidopsis
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Abstract
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This experiment was carried out to investigate the effects of simulated acid rain (SAR) on inducing external and internal malstructures of leaves and stems of Arabidopsis such as necrotic spot formation and destruction of chlorophyll pigments. There was no critical change on stem but many changes were found on leaf surface after SAR treated directly on Arabidopsis. The morphological changes between two ecotypes, Sei-O and Col-O with SAR treatment were not clear but the number of necrotic spots on leaves gave some differences between two ecotypes. Col-O had more necrotic spots on leaves while the tissue damage was more severe. With pH 3.0 SAR, the cells nearby trichomes on the upper epidermis were much damaged and were turned out to be necrosis. The upper epidermis shown necrotic symptom had damaged cuticle layers and pressed severely. Mesophyll cells on necrotic spots were broken and pressed, too. However, bundle sheath cells were normal. Thereafter, after SAR treatment, the changes of necrotic spot formation on two ecotypes and different organs might be influenced by the depth of cuticle layers and/or induction of genes involved in necrosis.
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