Cupressus sempervirens L. var. pyramidalis and C. sempervirens var. horizontalis were examined for their pollen morphometry and ultrastructure to verify whether, in addition to phenotype, pollen could also show characteristics useful to discriminate the two infraspecific taxa. C. sempervirens var. pyramidalis compared to c. sempervirens var. horizontalis has mainly larger, subcircular pollen with a higher percentage of apolar and germinating grains, and a wall with thicker intine; the cytoplasm has a greater number of callose-containing vesicles. C. sempervirens var. horizontalis has pollen distributed in five classes of shape. In addition it is smaller and shows a higher percentage of ruptured grains, and a lower percentage of germination in vitro. The cytoplasm contains vesicles rich in callose and also a higher amount of osmophilic bodies. Pollen grains in both varietas contain only one cell at dispersal. The reported differences in pollen morphometry, structure and biology, together with the phenotypic characteristics of the tree, support the validity of two infraspecific taxa.

Grilli Caiola, M., Travaglini, A., & Giuliano, M. (2000). Palynological study of Cupressus sempervirens L. var. pyramidalis and var. horizontalis. PLANT BIOSYSTEMS, 134(1), 99-109 [10.1080/11263500012331350405].

Palynological study of Cupressus sempervirens L. var. pyramidalis and var. horizontalis

TRAVAGLINI, ALESSANDRO;
2000

Abstract

Cupressus sempervirens L. var. pyramidalis and C. sempervirens var. horizontalis were examined for their pollen morphometry and ultrastructure to verify whether, in addition to phenotype, pollen could also show characteristics useful to discriminate the two infraspecific taxa. C. sempervirens var. pyramidalis compared to c. sempervirens var. horizontalis has mainly larger, subcircular pollen with a higher percentage of apolar and germinating grains, and a wall with thicker intine; the cytoplasm has a greater number of callose-containing vesicles. C. sempervirens var. horizontalis has pollen distributed in five classes of shape. In addition it is smaller and shows a higher percentage of ruptured grains, and a lower percentage of germination in vitro. The cytoplasm contains vesicles rich in callose and also a higher amount of osmophilic bodies. Pollen grains in both varietas contain only one cell at dispersal. The reported differences in pollen morphometry, structure and biology, together with the phenotypic characteristics of the tree, support the validity of two infraspecific taxa.
Pubblicato
Rilevanza nazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/02
English
Cupressus sempervirens; Pollen; Ultrastructure
Grilli Caiola, M., Travaglini, A., & Giuliano, M. (2000). Palynological study of Cupressus sempervirens L. var. pyramidalis and var. horizontalis. PLANT BIOSYSTEMS, 134(1), 99-109 [10.1080/11263500012331350405].
Grilli Caiola, M; Travaglini, A; Giuliano, M
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/44720
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