Protein accumulation in developing endosperm of a high‐protein line ofTriticum dicoccoides
作者:
MARY L. PARKER,
期刊:
Plant, Cell&Environment
(WILEY Available online 1982)
卷期:
Volume 5,
issue 1
页码: 37-43
ISSN:0140-7791
年代: 1982
DOI:10.1111/1365-3040.ep11587585
出版商: Blackwell Publishing Ltd
关键词: Triticum dicoccoides;Graminae;wheat;endosperm;ultrastructure;protein deposition;Golgi apparatus
数据来源: WILEY
摘要:
Abstract.Endosperm tissue from developing grains of a line of wheat (Triticum dicoccoides) which accumulates up to 30% protein in the mature grain, was examined by electron microscopy to establish the ontogeny of the storage protein bodies. Ultrastructural evidence suggests that storage proteins of wheat may be transported from their site of synthesis on the rough endoplasmic reticulum (ER) to protein bodies by two different routes within the endomembrane system. The first route, which probably functions throughout protein deposition, involves the transport of protein from the cisternal rough ER to the protein vacuolesviathe Golgi apparatus. The second route, observed 20 d after anthesis, appears to lead directly from dilated regions of the rough ER to protein vacuoles, bypassing the dictyosomes. Phytin inclusions are found in protein vacuoles of starchy endosperm cells adjacent to the aleurone layer of developing grain.
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