Posidonia oceanica (L.) Delile: A Structural Study of the Photosynthetic Apparatus |
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Authors: | P Mariani Colombo N Rascio F Cinelli |
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Institution: | Istituto di Botanica e Fisiologia Vegetale, Universitàdi Padova, Via Orto Botanico 15, 1–35100 Padova, Italy.;Istituto di Zoologia, Universita di Pisa, 1–56100 Pisa, Italy. |
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Abstract: | Abstract. P. oceanica forms broad prairies which completely surround the island of Ischia. This is a histochemical and ultrastructural study of the photosynthetic apparatus of the Posidonia plant. In the leaf, epidermal cells have a porous region underneath the cuticle and contain most of the chloroplasts. Fiber bundles run hypodermally and phenol storing cells are present in the mesophyll. Chloroplast ontogenesis is characterized by juvenile stages with provesicular bodies. Sea depth apparently affects some morphological features of the photosynthetic apparatus, like leaf blade thickness, phenolic cell and hypodermal fiber frequency. |
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Keywords: | chloroplast ontogenesis photosynthetic apparatus Posidonia oceanica sea depth effects seagrasses |
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