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Leaf anatomy of tissue cultured liquidambar styraciflua hamamelidaceae during acclimatization



Leaf anatomy of tissue cultured liquidambar styraciflua hamamelidaceae during acclimatization



American Journal of Botany 69(10): 1579-1586



Structural changes accompanying the acclimation process were observed in leaves of sweetgum, L. styraciflua, using light and transmission electron microscopy (TEM). Comparisons were made of leaves obtained from tissue culture, plantlets acclimated after transfer from the in vitro environment to soil, and field grown trees. Leaves of cultured plantlets lacked a differentiated palisade parenchyma and had spongy parenchyma interspersed with large air spaces. Field grown leaves showed distinct palisade and spongy tissues and a high cell density. New leaves from acclimated plantlets showed an elongation of the upper mesophyll with fewer intercellular spaces than cultured plants. Cells from leaves from in vitro plantlets had large vacuoles, limited cytoplasmic content and flattened chloroplast with an irregularly arranged internal membrane system. Acclimated and field leaf cells had a greater cytoplasmic content than cultured leaves, with the former having more dominate vacuoles. Chloroplasts had evident grana. Acclimated and field leaves had a well developed cuticule, unlike leaves from culture.

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Accession: 005798842

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