Endoplasmic Reticulum, Oleosins, and Oils in Seeds and Tapetum Cells

Endoplasmic reticulum, oleosins, and oils in seeds and tapetum cells.

Diverse organisms contain neutral lipids in subcellular particles for food reserves and other purposes. These lipid particles are present in seeds, flowers, pollen and fruit of higher plants, the vegetative and reproductive organs of primitive plants, algae, fungi, nematodes, mammalian glands and brown adipose tissue of mammals, and bacteria. Of all these lipid particles, the oil bodies (OBs) i...

Update on Endoplasmic Reticulum and Oleosin in Seed and Tapetum Endoplasmic Reticulum, Oleosins, and Oils in Seeds and Tapetum Cells

Diverse organisms contain neutral lipids in subcellular particles for food reserves and other purposes. These lipid particles are present in seeds, flowers, pollen and fruit of higher plants, the vegetative and reproductive organs of primitive plants, algae, fungi, nematodes, mammalian glands and brown adipose tissue of mammals, and bacteria. Of all these lipid particles, the oil bodies (OBs) i...

Sporopollenin biosynthetic enzymes interact and constitute a metabolon localized to the endoplasmic reticulum of tapetum cells.

The sporopollenin polymer is the major constituent of exine, the outer pollen wall. Recently fatty acid derivatives have been shown to be the precursors of sporopollenin building units. ACYL-COA SYNTHETASE, POLYKETIDE SYNTHASE A (PKSA) and PKSB, TETRAKETIDE α-PYRONE REDUCTASE1 (TKPR1) and TKPR2 have been demonstrated to be involved in sporopollenin biosynthesis in Arabidopsis (Arabidopsis thali...

Oleosins and oil bodies in seeds and other organs.

Proteomic analysis of endoplasmic reticulum stress responses in rice seeds

The defects in storage proteins secretion in the endosperm of transgenic rice seeds often leads to endoplasmic reticulum (ER) stress, which produces floury and shrunken seeds, but the mechanism of this response remains unclear. We used an iTRAQ-based proteomics analysis of ER-stressed rice seeds due to the endosperm-specific suppression of OsSar1 to identify changes in the protein levels in res...