C. Saito et al., Improved sensitivity for high resolution in situ hybridization using resinextraction of methyl methacrylate embedded material, BIOTECH HIS, 74(1), 1999, pp. 40-48
An in situ hybridization procedure resulting in both high resolution and se
nsitivity was established by using the removable methyl methacrylate resin,
Technovit 9100, Young bicellular pollen of tobacco (Nicotiana tabacum L. S
R-1) was embedded in Technovit 9100 resin and sectioned, The resin was extr
acted with (2-methoxyethyl)-acetate followed by in situ hybridization with
cRNA probes to detect cytoplasmic 18S/25S rRNA. Signal intensity obtained b
y this procedure was approximately twice as great as that obtained by an ea
rlier procedure using Technovit 7100, a glycol methacrylate resin that cann
ot be removed from sections. This improvement in sensitivity made it possib
le to observe subcellular localization of small amounts of RNA as revealed
by visualization of plastid 23S rRNA in a generative cell of Plumbago auric
ulata pollen.