Saffron (Crocus sativus L. Iridaceae) chromoplasts and other plastids were studied by electron microscope to determine their structure, origin and pigment localization. Plastids from pistils of floral buds and flowers at anthesis, dried and decoloured stigmas, and green and senescent leaves were examined. Results indicated that mature saffron chromoplasts occur in the red parts of stigmas and have a reticulo-tubular structure. They contain a reticulum of tubules and plastoglobules. Tubules formed dilated vesicles mainly while plastoglobules appeared numerous and scattered on the whole chromoplast. Chromoplasts appeared in red stigma of very young floral buds. They originated from amyloplasts, the only plastids occurring in the colourless basal portion of style, as well as in the parenchyma of ovary and corm. Transition forms of plastid as amylo-chromoplast, occur in the yellow parts of stigma and style. Senescent leaves did not show plastids with structure similar to the chromoplast of red stigma. Red pigmented and scented stigmas might cooperate in saffron reproduction by attracting pollinator.

Grilli Caiola, M., Canini, A. (2004). Ultrastructure of chromoplasts and other plastids in Crocus sativus L. (Iridaceae). PLANT BIOSYSTEMS, 138(1), 43-52 [10.1080/11263500410001684116].

Ultrastructure of chromoplasts and other plastids in Crocus sativus L. (Iridaceae)

CANINI, ANTONELLA
2004-01-01

Abstract

Saffron (Crocus sativus L. Iridaceae) chromoplasts and other plastids were studied by electron microscope to determine their structure, origin and pigment localization. Plastids from pistils of floral buds and flowers at anthesis, dried and decoloured stigmas, and green and senescent leaves were examined. Results indicated that mature saffron chromoplasts occur in the red parts of stigmas and have a reticulo-tubular structure. They contain a reticulum of tubules and plastoglobules. Tubules formed dilated vesicles mainly while plastoglobules appeared numerous and scattered on the whole chromoplast. Chromoplasts appeared in red stigma of very young floral buds. They originated from amyloplasts, the only plastids occurring in the colourless basal portion of style, as well as in the parenchyma of ovary and corm. Transition forms of plastid as amylo-chromoplast, occur in the yellow parts of stigma and style. Senescent leaves did not show plastids with structure similar to the chromoplast of red stigma. Red pigmented and scented stigmas might cooperate in saffron reproduction by attracting pollinator.
2004
Pubblicato
Rilevanza nazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/01 - BOTANICA GENERALE
English
Con Impact Factor ISI
Chromoplasts; Crocus sativus; Plastids; Saffron; Ultrastructure
Grilli Caiola, M., Canini, A. (2004). Ultrastructure of chromoplasts and other plastids in Crocus sativus L. (Iridaceae). PLANT BIOSYSTEMS, 138(1), 43-52 [10.1080/11263500410001684116].
Grilli Caiola, M; Canini, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/30633
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