Abstract: Brown algae oligosaccharides (AOS) are highly effective plant biostimulants and signal elicitors that establish a three-dimensional crop stress resistance system through five mechanisms, enhancing drought, cold, saline-alkali tolerance, and disease resistance, ensuring stable yields under adverse conditions. City Max Group's high-activity AOS products are produced using controlled degradation technology, available in both liquid and powder forms, with high concentration and strong adaptability, promoting growth, improving fertiliser efficiency, and suppressing pathogens.

I.Alginate Oligosaccharides (AOS): Building a five-layer defence system to create a comprehensive stress-resistant barrier for crops

Alginate oligosaccharides (AOS), as efficient plant biostimulants and signal elicitors, act as 'stress resistance vaccines and immunity enhancers' for crops. They do not directly help crops resist disasters but awaken the crops' own defence systems, making them more resistant to drought, cold, saline-alkali conditions and pests.

1. As a signalling molecule, it first sends a 'warning' to the crop, putting the entire plant into a state of readiness

Fuco-oligosaccharides can quickly transmit stress resistance signals to crops, activating the whole-plant defence system, initiating comprehensive protection from roots to leaves, and enhancing the crop's ability to cope with adverse conditions.

2. Strengthen the 'antioxidant system' to reduce injuries and premature ageing

Drought, low temperatures, salinity, and pests can produce reactive oxygen species that damage crop cells, leading to yellowing of leaves; brown algae oligosaccharides can enhance the crop's detoxification ability, remove toxins, protect the membrane and maintain greenness, delaying premature ageing.

3. Locks in moisture, more resistant to drought and salinity

Drought and saline-alkaline conditions easily cause dehydration of crop cells. Brown algal oligosaccharides can promote the accumulation of water-retaining substances such as proline and sugars, reduce water loss, maintain cell turgidity, and support normal crop growth in arid and saline-alkaline soils.

4. Protect cell membranes and proteins, preventing crops from 'freezing hard or being sun-damaged'

Low temperatures easily cause cell membrane cracking, while high temperatures and salinity can damage protein structure; algal oligosaccharides can stabilise cell membranes and key proteins, enhancing crops' resistance to extreme temperatures and salinity, and protecting the integrity of plant structures.

5. Activate the 'stress-resistant genes' to become stronger from the root

Brown algae oligosaccharides can activate crop stress-resistance genes, enhancing stress resistance from the root, providing long-lasting strength.

Brown algal oligosaccharides build a multi-layered, three-dimensional defence against stress in crops by signalling to the crops → clearing toxins → locking in moisture → protecting cells → activating stress resistance genes, ultimately allowing crops to be more drought-tolerant, more cold-tolerant, more salt-alkali-tolerant, less prone to disease and maintain yield under adversity.

II.Highly active brown algae oligosaccharides: dual formulation, high compatibility

ALGINATE OLIGOSACCHARIDE is a highly active oligosaccharide fertiliser extracted from brown algae by City Max Group using controlled degradation technology. With a degree of polymerisation of 2-10, it acts as a potent biostimulant, promoting root growth, germination and overall growth, inducing the secretion of key hormones such as IAA, ABA and gibberellins, and significantly enhancing crop resistance to drought, cold, salinity, waterlogging and viruses. It also improves fertiliser efficiency, facilitates nutrient absorption, accelerates the synthesis of amino acids and proteins, and inhibits plant pathogens. The product exhibits excellent thermal stability and compatibility, can be safely mixed with elements such as calcium and magnesium, and is suitable for modern fertiliser systems.

The liquid formulation is dark brown, with an alginate oligosaccharide (AOS) content of ≥30%. High-activity liquid alginate oligosaccharides can rapidly trigger plant responses, promoting root development and fruit swelling. This product has excellent compatibility and can be mixed with various water-soluble fertilizers, fertigation fertilisers and aquarium fertilizers, safely compatible with calcium, magnesium and other additives, enabling rapid nutrient absorption and uniform distribution.

Product Link：https://www.citymax-group.com/aos-l-product/

The powder form is a white powder, with an alginate oligosaccharide (AOS) content of ≥90%. Highly active powdered alginate oligosaccharides can effectively stimulate plant physiological activity, promoting robust crop growth, well-developed roots, and nutrient absorption. This product can be used as a fertiliser additive in formulations or applied directly, significantly enhancing crop growth and quality, making it a safe, efficient, and environmentally friendly high-quality biostimulant.

Product Link：https://www.citymax-group.com/aos-p-product/

Author Profle PING｜Senior Plant Physiology and Nutrition solutions Architect, CITYMAX GROUP Focusing on interdisciplinary research and Technological translation at the intersection of plant Physiology and biostimulants,we are dedicated to Transforming fundamental scientific theories into Verifiable field solutions.By integrating cutting-edge Mechanisms with practical production applications, We drive the advancement of agricultural input R&D And deployment towards a new phase characterised By data-driven and mechanism-based approaches

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