Metode Koleksi dan Preservasi Spesimen Tumbuhan

Summary

This tutorial video from the Gadjah Mada University's Biology Department showcases methods for collecting and preserving plant specimens. It covers the essential tools for gathering, including secateurs and tweezers, and emphasizes the importance of collecting complete specimens with roots, leaves, flowers, and fruits. The video instructs on labeling specimens with collection numbers, dates, and collector details. It also demonstrates the use of 70% alcohol for initial preservation and the proper techniques for pressing and drying specimens. Finally, it guides viewers through the mounting process on herbarium paper, ensuring specimens are accurately identified and well-preserved for future study.

Takeaways

• 🌿 The tutorial is about collecting and preserving plant specimens for identification and herbarium creation.
• 🔍 The first step in collecting plants is to gather complete specimens including roots, stems, leaves, flowers, and fruits if possible.
• ✂️ Tools such as scissors, a knife, tweezers, and a collection bag are essential for collecting plant specimens.
• 🏷️ Each specimen must be accompanied by a label with collection details like date, collector's name, and location.
• ✏️ Use a 2B pencil to write on the labels to ensure the information does not fade or smudge easily.
• 🍃 The preservation process starts with placing the specimens in 70% alcohol to prevent decay and maintain their structure.
• 🌼 For flowering plants, it's crucial to collect parts with reproductive organs like flowers and fruits for accurate identification.
• 📝 Record the collection details in a field book to keep track of the specimens and their characteristics.
• 🌱 For grasses, collect the entire plant including the roots to ensure representativeness for identification.
• 🌿 When collecting larger fruits or flowers that cannot be pressed, use separate collection bottles filled with 70% alcohol.
• 📄 After collection, specimens are pressed between sheets of newspaper and dried to prepare them for mounting on herbarium sheets.

Q & A

What is the main topic of the tutorial video?

The main topic of the tutorial video is the method of collection, preservation, and preparation of plant specimens in the herbarium laboratory at the University of Gadjah Mada.

What are the essential tools needed for collecting plant specimens?

The essential tools for collecting plant specimens include a knife or a similar tool for cutting, a pair of scissors for cutting branches, and tweezers for collecting small parts of the plant.

Why is it important to collect the whole plant including leaves, flowers, and fruits?

Collecting the whole plant including leaves, flowers, and fruits is important for proper identification and study of the plant, as these parts provide key morphological characteristics.

What is the purpose of using 70% alcohol in the preservation process?

70% alcohol is used in the preservation process to prevent the growth of bacteria and fungi, which helps to keep the plant specimens from decomposing.

How should the plant specimens be labeled during the collection process?

The plant specimens should be labeled with a hanging tag or label that includes the collection number, collector's name, collection date, and location. This information should be written with a 2B pencil.

What is the significance of collecting plant specimens with roots?

Collecting plant specimens with roots is significant because roots are essential for plant identification and can provide information about the plant's growth and adaptation to its environment.

Why is it necessary to press the collected plant specimens between sheets of newspaper?

Pressing the collected plant specimens between sheets of newspaper helps to dry them out and maintain their shape, which is crucial for the preservation and mounting process in the herbarium.

How should the plant specimens be arranged on the herbarium paper during the mounting process?

The plant specimens should be arranged on the herbarium paper in a proportional and natural position, with labels attached to the bottom right corner, ensuring that the labels are not covered by the specimens.

What is the role of the collection number in the herbarium process?

The collection number is a unique identifier for each plant specimen, which helps in cataloging and referencing the specimens in the herbarium and related research.

How are the plant specimens checked for proper drying before mounting?

Plant specimens are checked for proper drying by ensuring they are completely dry to the touch and maintain their pressed shape, which indicates they are ready for mounting on herbarium paper.