ISSN:
1615-6102
Keywords:
Zea mays L.
;
Etioplasts
;
Etioplast differentiation
;
Etioplast senescence
;
Optical diffraction
;
Prolamellar body arrangement
;
Prothylakoids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary The entire life-cycle of maize leaf etioplasts has been followed. Prolamellar bodies with different types of tubular membrane arrangement can be found in the juvenile stages of the organelles, while in mature etioplasts nearly all the prolamellar bodies exhibit an “hexagonal ring” arrangement, which, by optical diffraction, appears to be the most regular and compact possible. The prothylakoid membranes also undergo changes during organelle differentiation, and their different organization and arrangement produce a clear dimorphism between the etioplasts of mesophyll and bundle sheath cells. In senescent etioplasts the prothylakoids are more affected, while the prolamellar bodies appear rather stable, also in situations where protochlorophyll(ide) content is very low. The formation of clusters of osmiophilic globules is coupled with the breakdown of the etioplast membranes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01276591
Permalink
