Plants due to the high content of various bioactive compounds are the main raw material for production of valuable, and useful bio-products (e.g., food, cosmetics, medicines, biostimulants, biopesticides, and feed). Different plant parts, for instance: seeds, fruits, flowers, stems, leaves, and roots can be used for their manufacture. Nowadays, there is a clear need to develop new, efficient, and environmentally safe methods of stimulation of plant, growth and crop protection. Plant-based extracts are new, natural, and multi-compounds products that could be used for these purposes. They possess antifungal, antimicrobial, antiparasitic, antiprotozoal, antioxidant, medicinal, aromatic, and anti-inflammatory properties. This group of natural products has the potential to become a new generation of bio-products suitable for use in sustainable agriculture. The purpose of this review is to provide an overview of the literature describing the impact of plant-derived extracts/biostimulants (PDBs) on crops grown in controlled, and real conditions as well as under various abiotic and biotic stresses; the extraction methods used to obtain PDBs, and the specific constituents responsible for their biostimulating activity. The application of these bio-products could be beneficial for sustainable production, due to several advantages, such as low toxicity to humans and the environment, enhanced resistance of cultivated plants to biotic and abiotic stress, increased yields and quality of crops, as well as the reduction in the use of mineral fertilisers and pesticides. However, deeper cooperation between industrial and academic research is required to accelerate the development of new environmentally safe solutions for future agriculture.

Highlights
- Higher plants constitute a rich source of various bioactive compounds for the production of useful natural products. 
- The importance of the proper choice of extraction method and solvent to process and preserve the desired substances.
- Plant extracts as biostimulants and plant protection products for use in modern and sustainable agriculture. 
- The positive effects of plant-based extracts on plants cultivated under normal and unfavourable conditions.
- Plant extracts as a new generation of eco-friendly products for the increment of the production of high-quality food.

由于各种生物活性化合物含量高，植物是生产有价值、有用的生物产品（例如.、食品、化妆品、药品、生物刺激素、生物农药和饲料）。不同的植物部分，例如：种子、果实、花、茎、叶和根可用于制造。如今，显然需要开发新的、有效的和环境安全的刺激植物、生长和作物保护的方法。植物提取物是可用于这些目的的新型、天然和多化合物产品。它们具有抗真菌、抗菌、抗寄生虫、抗原生动物、抗氧化、药用、芳香和抗炎特性。这组天然产品有潜力成为适用于可持续农业的新一代生物产品。本综述的目的是提供文献综述，描述植物提取物/生物刺激素 (PDB) 对在受控和真实条件下以及各种非生物和生物胁迫下生长的作物的影响；用于获得 PDB 的提取方法，以及负责其生物刺激活性的特定成分。由于对人类和环境的毒性低、栽培植物对生物和非生物胁迫的抵抗力增强、作物产量和质量增加，以及对人类和环境的低毒性，这些生物产品的应用可能有利于可持续生产。减少矿物肥料和农药的使用。然而，

亮点
- 高等植物是各种生物活性化合物的丰富来源，可用于生产有用的天然产品。 
- 正确选择提取方法和溶剂以处理和保存所需物质的重要性。
- 植物提取物作为生物刺激剂和植物保护产品，用于现代和可持续农业。 
- 植物提取物对正常和不利条件下种植的植物的积极影响。
- 植物提取物作为新一代环保产品，用于增加优质食品的生产。