Overview
Brassinosteroids (BRs) are a class of polyhydroxysteroids recognized as the sixth major plant hormone group. Discovered in the 1970s from rapeseed pollen, these compounds play crucial roles in plant growth and development. Unlike synthetic plant growth regulators, brassinosteroids are naturally occurring substances that regulate cellular processes at extremely low concentrations (nanomolar range). In agricultural applications, brassinosteroid-based products are valued for their ability to enhance crop performance without the environmental concerns associated with some synthetic alternatives. Their mode of action involves binding to receptor kinases in plant cells, triggering signal transduction pathways that affect gene expression and physiological responses.
Physical and Chemical Properties
Brassinosteroids are characterized by their steroid skeleton with oxygen-containing functional groups. The most active natural form, brassinolide, contains a lactone group in the B-ring and hydroxyl groups at key positions. These structural features are essential for biological activity. The compounds exhibit moderate stability under normal conditions but degrade under strong light or extreme pH. Technical-grade products typically contain 90-98% active ingredient, often formulated as wettable powders or liquid concentrates for agricultural use. Their low water solubility necessitates the use of surfactants or organic solvents in commercial formulations.
Main Applications
In modern agriculture, brassinosteroid regulators are primarily used to enhance stress tolerance and yield in field crops (rice, wheat, corn), vegetables, and fruit trees. They improve plant resilience against abiotic stresses including drought, salinity, and temperature extremes by activating protective metabolic pathways. Horticultural applications include promoting fruit setting and quality improvement in greenhouse crops. At optimal concentrations (typically 0.01-0.1 ppm), BRs increase photosynthetic efficiency, nutrient uptake, and assimilate partitioning to economically valuable plant parts. Some formulations combine BRs with micronutrients or other biostimulants for synergistic effects.
Safety and Storage
Brassinosteroid products are classified as low-toxicity (WHO Class U) with favorable environmental profiles. The acute oral LD50 in rats exceeds 5000 mg/kg, indicating very low mammalian toxicity. However, standard agricultural chemical handling precautions should be followed. Proper storage requires protection from moisture and high temperatures. Unopened containers maintain stability for 2-3 years when stored below 25°C. Formulated products should be used within one season after opening. Disposal should follow local regulations for agricultural chemicals, though brassinosteroids pose minimal environmental risk due to rapid biodegradation.
B2B Procurement Guide
When sourcing brassinosteroid products, prioritize suppliers with documented quality control procedures. Key specifications include purity level (≥90% for technical grade), residual solvent content, and biological activity verification. Large agricultural purchasers should request batch analysis certificates. Consider formulation type based on application methods: wettable powders for foliar sprays, liquid formulations for drip irrigation systems. For international shipments, verify compliance with destination country regulations (e.g., EPA registration in the US, EC approval in Europe). Bulk purchases (25kg+) typically offer 15-30% cost savings compared to retail packaging.
Related Manufacturers
- 主营：精己二酸、对苯二甲酸、二甲基甲酰胺、调节剂、碳酸钾、氨水、液碱、醋酸、二甲苯、甲醇、乙二醇、二乙二醇、醋酸乙酯、对苯二甲酸二甲酯、柠檬酸、磷酸二氢钾、聚丙烯酰胺、氯化钠
- 主营：冲施肥、叶面肥、杀菌剂、14羟基芸苔素甾醇、双岐钙镁、根腐病、青枯病、猕猴桃溃疡病、微生物菌剂、土壤改良剂、柑橘叶斑病、人参立枯病、猝倒病、病毒抑制剂、防病肥料、有机生物酶、进口滴灌肥、OEAT酶活剂、奥植丰、杀螨剂、春雷王铜、番茄青枯病、奥多收、土壤调理剂、奥丰液体氮叶面肥、解肥害肥料
- 主营：胺鲜酯、海藻精、二乙氨基、芸苔素、种植调节剂、调节剂、种植江硕、生根膨果、促保利素、植物生长、无色无味、农业胺鲜、农业膨果、肥料增效剂、微生物生长、农业冲施肥、酯内酯促进、科技改良剂、酯促进植物、生物活性物质、改善土壤结构、辛酸、丁酸、丁二酸、生根粉
- 主营：杀菌剂、小麦田除草剂、玉米田除草剂、调节剂、封闭田除草剂、杀虫剂、肥料、水溶肥、地下害虫颗粒剂、拌种剂、杀螨剂
- 主营：羟基芸苔素甾醇、乙酰丙酮氧
- 主营：4-二甲氨基吡啶、乙酰苯肼、三羟甲基氨基甲烷、羟基芸苔素甾醇、DMAP、乙酰丙酮氧钒、N-乙烯基己内酰胺、异硫氰酸胍、盐酸胍、2-巯基苯并咪唑、二苯基硅二醇、吡唑、噻苯隆、丙交酯、二硫苏糖醇、4-羟乙基哌嗪乙磺酸、丙环唑、3-甲基-4-异丙基、噻菌灵、1-乙炔基环己醇、PPS-OH、PPS、5-二巯基噻二唑、N-二甲基间甲苯、2-甲基咪唑
- 主营：4-二甲氨基吡啶、N-乙烯基己内酰胺、2-氨基噻唑、羟基芸苔素甾醇、苯甲酸酐、4-乙烯二氧噻吩、1-羟基苯并三唑无水、草酸氧钒、对羟基苯乙胺、对二甲氨基苯甲醛、六氟磷酸铵、烯丙基硫脲
- 主营：方石英、甲酸镍、阻燃剂、调节剂、萃取粉、香果香、藏花醛、桦木油、稀释剂、羟乙基、淀粉钠、洗涤剂、十八烷、润肤剂、乙酸锶、氧化剂、防腐剂、铬酸锌、丙氨酸、二胜肽、焦木酸、成核剂、羊毛醇、氢氟油、壳聚糖、厚朴酚
- 主营：甘氨酸、胺原粉、呋虫胺、羟基芸苔素甾醇、辛硫磷、噻唑膦、甘宝素、酸原粉、乙磷铝、醇原粉、盐酸胍、嘧菌酯、盐原粉、脲原粉、甲霜灵、苯氧威、丁醚脲、灭草松、威原粉、茚虫威、诱导剂、乙烯利、吡虫啉、增甘膦、中间体、vc乙基醚
- 主营：调节剂、农用土壤杀菌剂、农药
- 主营：植物醇、植物提取物、8-二氨基萘、植物生长调节剂、4-萘二甲酸、8-氨基喹哪啶、聚二羟基吲哚、2-巯基噻唑啉、6-二羟基吲哚氢、磷钼酸、石胆酸、乙烯基膦酸、劳伦酸、二水合钼酸钠、4-辛氧基二苯碘六氟、麦角硫因、DL-樟脑醌、羟乙基磺酸、钼酸、甲基丙烯酸氧杂环丁烷、三羟甲基氨基甲烷盐酸、4-羟乙基哌嗪乙磺酸、5-甲基 N-乙烯基、腺苷、L-谷氨酸-5-叔丁、聚季铵盐-55
- 主营：丝兰提取物、西兰花种子水提物、萝卜硫甙、豆甾醇、苹果醋粉、杜仲提取物、芦荟提取物、山药提取物、苦杏仁提取物
- 主营：羟基胆甾醇、分析纯试剂、化学实验检测
- 主营：甾醇抑制剂、农药原药、农药/医药中间体、添加剂