Class XII Practical: Slide Preparation - T.S. of Hydrophyte Stem

Objective

To prepare a temporary transverse section (T.S.) of a hydrophyte (aquatic plant) stem and observe its anatomical adaptations to an aquatic environment.

Guidelines

Specimen Selection: Obtain a fresh stem of an aquatic plant (e.g., Hydrilla, Nymphaea, Eichhornia).
Sectioning: Carefully cut very thin transverse sections of the stem using a sharp blade.
Staining (Optional): Stain the sections with a dilute stain like safranin or methylene blue.
Mounting: Mount the stained section in a drop of water on a clean glass slide and cover with a coverslip.
Observation: Observe the slide under a compound microscope. Look for characteristic adaptations:
- Reduced Vascular Tissue: Less developed xylem and phloem.
- Large Air Chambers (Aerenchyma): Extensive air spaces for buoyancy and gas exchange.
- Thin Cuticle/Absent Stomata: Reduced need for water conservation.
- Poorly Developed Mechanical Tissues: Less need for support in water.
Drawing: Draw a neat, labeled diagram of the observed T.S. of the hydrophyte stem, highlighting its adaptive features.

Expected Outcome

Clear microscopic observation of anatomical features in a hydrophyte stem that facilitate survival in an aquatic habitat.

Class XII Practical: Slide Preparation - T.S. of Hydrophyte Stem

Objective

To prepare a temporary transverse section (T.S.) of a hydrophyte (aquatic plant) stem and observe its anatomical adaptations to an aquatic environment.

Guidelines

Specimen Selection: Obtain a fresh stem of an aquatic plant (e.g., Hydrilla, Nymphaea, Eichhornia).
Sectioning: Carefully cut very thin transverse sections of the stem using a sharp blade.
Staining (Optional): Stain the sections with a dilute stain like safranin or methylene blue.
Mounting: Mount the stained section in a drop of water on a clean glass slide and cover with a coverslip.
Observation: Observe the slide under a compound microscope. Look for characteristic adaptations:
- Reduced Vascular Tissue: Less developed xylem and phloem.
- Large Air Chambers (Aerenchyma): Extensive air spaces for buoyancy and gas exchange.
- Thin Cuticle/Absent Stomata: Reduced need for water conservation.
- Poorly Developed Mechanical Tissues: Less need for support in water.
Drawing: Draw a neat, labeled diagram of the observed T.S. of the hydrophyte stem, highlighting its adaptive features.

Expected Outcome

Clear microscopic observation of anatomical features in a hydrophyte stem that facilitate survival in an aquatic habitat.

Practical Guideline - Hydrophyte Stem

Class XII Practical: Slide Preparation - T.S. of Hydrophyte Stem

Objective

Guidelines

Expected Outcome

On this page

Practical Guideline - Hydrophyte Stem

Class XII Practical: Slide Preparation - T.S. of Hydrophyte Stem

Objective

Guidelines

Expected Outcome

On this page