Seaweeds
Seaweeds are large algae that grow in the sea and along shallow coastal waters. They can often be seen attached to rocks on the shore. These underwater plants are not just part of marine life but are also extremely useful to humans. Seaweeds are known as the “wonder plants of the sea” because they can be used in food, energy production, medicine, agriculture, and even in personal care products. Due to their healing and nutritional benefits, they are also called the “Medical Food of the 21st Century.” People use them to treat conditions like goiter and cancer, and they are used in making capsules, bone-replacement materials, and even during heart surgeries.
Industrial Importance of Seaweeds
- Seaweeds are very important for various industries. They are used to produce substances like agar, agarose, and carrageenan. These materials are widely used in laboratories, the pharmaceutical industry, cosmetics, paper production, processed food, paint, and cardboard. In India, there are 46 industries that work with seaweeds. Out of these, 21 make agar and 25 make alginate. However, many of these industries are not working at full capacity because there is not enough raw seaweed available to meet the demand.
Where Are Seaweeds Found in India?
- In India, seaweeds are commonly found along the coasts of Tamil Nadu and Gujarat, as well as around the Lakshadweep and Andaman & Nicobar Islands. There are also rich seaweed beds near places like Mumbai, Ratnagiri, Goa, Karwar, Varkala, Vizhinjam, Pulicat, and Chilka Lake in Odisha. These areas provide the best natural environment for seaweeds to grow.
Cultivation and Current Challenges
- Traditionally, seaweed seed stock is collected from shallow seabeds, especially along the southeastern coast of Tamil Nadu. But due to excessive and unplanned harvesting, natural seaweed beds are being destroyed. To solve this issue, people have started seaweed farming. This type of farming is simple, low-cost, and does not need much maintenance. It also gives fast results because seaweeds grow quickly. If done properly, seaweed cultivation can become a good source of income for coastal communities while also helping protect the environment.
Facts of Seaweed · Seaweed is a nutrient-rich marine plant, packed with vitamins, minerals and amino acids. · It contains 54 trace elements and essential nutrients that help fight diseases like cancer, diabetes, arthritis, heart problems and high blood pressure. · Seaweed is a sea plant that grows in the ocean and seas. · Seaweed cultivation requires no land, freshwater, fertilizers or pesticides, making it sustainable. · The $5.6 billion seaweed industry is booming, with India’s production increasing steadily. · Under one of its components, the Pradhan Mantri Matsya Sampada Yojana (PMMSY) aims to boost seaweed production to 1.12 million tonnes in five years. |
Boosting Seaweed Production with Tissue Culture The CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI) introduced a tissue culture technique to mass-produce Kappaphycus alvarezii (elkhorn sea moss) in Tamil Nadu. This seaweed is valuable for producing carrageenan, used in food, pharma, and cosmetics. Through this project, tissue-cultured seedlings were distributed to farmers in Ramanathapuram, Pudukottai, and Tuticorin districts. Farmers produced 30 tonnes of seaweed in just two cycles, with a 20-30% higher growth rate and better-quality carrageenan. This breakthrough is set to boost commercial seaweed farming in India. |