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THE ULTRASTRUCTURE AND PHYSIOLOGY OF PROTEIN BODIES AND LIPIDS FROM HYDRATED DORMANT AND NONDORMANT EMBRYOS OF SETARIA LUTESCENS (GRAMINEAE)
Author(s) -
Rost Thomas L.
Publication year - 1972
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1972.tb10135.x
Subject(s) - biology , dormancy , ultrastructure , germination , botany , embryo , digestion (alchemy) , setaria , microbiology and biotechnology , chemistry , chromatography
Embryo protein bodies in S. lutescens have a uniform matrix and contain no globoid or crystalloid inclusions. Their digestion pattern consists of peripheral pitting, and the occurrence of vesicles along the margin of the formed invaginations suggests a controlled release mechanism. Protein bodies from both dormant and nondormant embryos were observed to be in all stages of digestion. Total protein decreases in both during the first 6 hr of hydration. Lipids do not decrease in hydrated dormant florets although a significant reduction does occur in germinating nondormant florets. Dormancy, therefore, may involve a mechanism that does not control processes already derived (protein body digestion) but does inhibit processes first begun by germination.