The Application of Seaweed Oligosaccharide in Agriculture

Seaweed comes in many varieties and is an important part of marine plants.  G-Teck BioScience focuses on Ascophyllum nodosum, a seaweed rich in bioactive molecules such as alginate, seaweed polysaccharide and algal starch. This particular seaweed has several beneficial biological activities, such as antibacterial, antiviral and antioxidant properties. It is a natural regulator of plant nutrition and an excellent fertilizer additive.

Seaweed polysaccharide is a complex mixture of high-molecular carbohydrates, which is composed of multiple identical or different monosaccharide groups linked by glycosidic bonds. They have antiviral properties. However, their large molecular weight often results in high viscosity and low solubility, which affects their effectiveness in biomedical and agricultural fields.

We have developed seaweed oligosaccharides using advanced technologies such as low-temperature enzymatic hydrolysis, membrane filtration, and natural antiseptic methods. These oligosaccharides are small molecules <2000 Da(400~1600DA)with a degree of polymerization of 2-10. They have attracted attention due to their unique reactive groups, small molecular size, and good water solubility. Seaweed oligosaccharides are functional compounds formed by linking β-D mannuronic acid and α-L guluronic acid through 3-1-4 glycosidic bonds.

Seaweed oligosaccharides have antioxidant properties that enhance plant growth and stress resistance. They are effective in reducing plant pests and diseases, making them a promising environmentally friendly fertilizer.

Application of seaweed oligosaccharides in promoting plant growth

Recent a serious of field tests have shown that seaweed oligosaccharides can enhance seed germination, promote root growth, and improve crop yields in a variety of plants, including pea, sorghum, corn, and wheat.

Regulates plant growth

Seaweed oligosaccharides act as signaling molecules, regulating plant growth and development. Compared with the control group, maize seeds treated with 0.075% solution significantly increased root length by 18% and seedling height by 46% on the 7th day of germination.

Seaweed extract

The presence of seaweed oligosaccharides activates the expression of hormones in plant seedlings, changes the activity of amylase, lipase and protease, accelerates the hydrolysis process of endosperm starch, and promotes seed germination and the growth of roots and shoots.


Seaweed oligosaccharides can not only increase plant height and leaf area, but also increase root length and chlorophyll content of functional leaves. In addition, they increase photosynthetic rate, stomatal conductance, transpiration rate, and intercellular carbon dioxide concentration.


Improve plant Resilience

Seaweed oligosaccharides can enhance the stress resistance of plants by inducing the production of resistant substances, regulating crop growth, increasing the content of soluble sugar and free proline, enhancing the activity of antioxidant enzymes, reducing membrane permeability and malondialdehyde content, etc.

According to the lab test, that there was a strong positive correlation between the Seaweed oligosaccharides concentration and leaf cell membrane permeability, soluble sugar and proline content. Among them, 0.4% has the most significant effect, which can enhance plant resistance and reduce damage caused by poisoning.

Under stress, plants produce more oxygen free radicals, enhancing the activity of anti-stress defense enzymes such as catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), and phenylalanine ammonia-lyase (PAL). This helps remove free radicals and prevent stress-related damage to plants.

In field experiments, applying 0.20% seaweed oligosaccharide induced low-temperature resistance in tobacco plants, significantly increasing the activity of anti-stress defense enzymes CAT, SOD, and POD. This enhanced the plants’ tolerance to low temperatures and protected them from damage.


Post time: Aug-04-2023