2.4.3. microscopy (light, scanning and transmission electron microscopy)
2.4.3.1. Light and transmission electron microscopy. Avocado tissue was cut into 10-min diameter discs approximately 2 mm thick. Discs were transferred into fixative ( 2% freshly prepared formaldehyde,25% glutaraldehyde in 0.1 M phosphate buffer pH 7.2) and stored at 4 องศา before processing and observation. For light microscopy blocks of tissue around 3×4×2 mm were excised from the disc, washed three in 0.1 M phosphate buffer (pH7.2) and then sectioned at 200 or 300 um using a stainless steel blade attached to a Vibratome 1000 ( Technical products International, st Louis, MO,USA). Section were either stained using a 0.1 % aqueous solution blue and observed using bright field microscopy or were viewed without staining by differential interference contrast microscopy using an Olympus vanox AHT3(Olympus optical co. Ltd., Tokyo,japan).
2.4.3. microscopy (light, scanning and transmission electron microscopy)
2.4.3.1. Light and transmission electron microscopy. Avocado tissue was cut into 10-min diameter discs approximately 2 mm thick. Discs were transferred into fixative ( 2% freshly prepared formaldehyde,25% glutaraldehyde in 0.1 M phosphate buffer pH 7.2) and stored at 4 องศา before processing and observation. For light microscopy blocks of tissue around 3×4×2 mm were excised from the disc, washed three in 0.1 M phosphate buffer (pH7.2) and then sectioned at 200 or 300 um using a stainless steel blade attached to a Vibratome 1000 ( Technical products International, st Louis, MO,USA). Section were either stained using a 0.1 % aqueous solution blue and observed using bright field microscopy or were viewed without staining by differential interference contrast microscopy using an Olympus vanox AHT3(Olympus optical co. Ltd., Tokyo,japan).
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