Beneficial Effects of Biostimulants in Various Flower Crops and Ornamental Plants

The sustainability production of horticultural crops is essential to meet consumer‟s demand. This is best achieved by increasing the efficient use of resources to make and provide healthy products. In contemporary years, various technological upheavals have been proposed in order to boost the sustainability of production systems, through a remarkable reduction of agrochemicals. An optimistic practice would be the use of substances and/or microorganisms that strengthen plant growth, increase tolerance to unfavorable soil and environmental conditions, and it also increases resource use efficiency. The term “biostimulant” was proposed for these substances and microorganisms by (Zhang and Schmidt, 1997). Plant biostimulants are the materials which include substances and microorganisms which stimulate natural processes when applied to plants or the rhizosphere the main functions of plant biostimulants include nutrient uptake, nutrient efficiency, tolerance to abiotic stresses, increase crop quality. Jardin (2015) proposed seven classes of substances that act as biostimulant namely: Humic and fulvic acids (Canellas et al., 2015), protein hydrolysates, seaweed extracts, chitosan (Pichyangkura and International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 10 (2020) Journal homepage: http://www.ijcmas.com