Acta Botanica Croatica, Vol. 40 No. 1, 1981.
Izvorni znanstveni članak
Structural and Functional Differentiation of Wheat Chloroplasts
Mercedes Wrischer
; Hrvatska
Sažetak
Photooxidation of diaminobenzidine (DAB) has been used to detect ultrastructurally the photosynthetic activity (photosystem I activity) in the thylakoids of differentiating chloroplasts of wheat leaves. It has been shown that the accumulation of photooxidized DAB deposits first in single thylakoids of plastids of cells lying 0.5 to 1 mm above the leaf base. Later the thylakoids multiply and aggregate into grana; in leaf segments being 2 — 3 mm above the leaf base, there are already chloroplasts with an elaborate system of grana and stroma thylakoids, which all show a positive DAB reaction. Plastid envelopes and small prolamellar bodies, which develop in young chloroplasts up to 1 cm from the leaf base, remain without photooxidized DAB deposits. The changes described are discussed in connection with the present knowledge of the functional differentiation of chloroplasts.
Ključne riječi
Hrčak ID:
158428
URI
Datum izdavanja:
31.12.1981.
Posjeta: 824 *