Cellular and subcellular localization of calcium in gravistimulated corn roots

• Published in: Protoplasma Vol. 129; no. 2/3; pp. 137 - 148
• Main Authors: Dauwalder, M, Roux, S.J, Rabenberg, L.K
• Format: Journal Article
• Language: English
• Published: Austria 01.01.1985
• Subjects: Antimony; calcium; Calcium - analysis; gravimetry; Gravitation; Gravitropism - physiology; Microscopy, Electron; Plant Root Cap - chemistry; Plant Root Cap - growth & development; Plant Root Cap - ultrastructure; Plant Roots - chemistry; Plant Roots - growth & development; Plant Roots - ultrastructure; roots; Spectrum Analysis; Staining and Labeling; Vacuoles - chemistry; Vacuoles - ultrastructure; Zea mays; Zea mays - chemistry; Zea mays - growth & development; Zea mays - ultrastructure
• ISSN: 0033-183X; 1615-6102
• DOI: 10.1007/bf01279911

Antimonate staining procedures and energy dispersive X-ray micro-analytical techniques were used to determine the patterns of localization of calcium in nonstimulated and gravistimulated corn roots. In horizontally positioned roots within the region of the developing bend there was a change in the staining from that principally localized within cells of the stele to asymmetric staining within the vacuoles of the cortical cells along the upper root surface. There was little staining in the walls. The pattern observed is quite different from that seen in gravistimulated coleoptiles. Staining of mitochondria, plastids and Golgi stacks was seen in most cell types, but no asymmetry of staining was observed. In the rootcap where graviperception is thought to occur, there was little staining of any cellular organelles.