Many factors can cause and affect cell growth in the plant such as external (environmental) and internal factors; one of the most important internal factors is plant growth hormones. Many hormones required for cell growth, such as auxins, gibberellins, brassinosteroids, ethylene, jasmonates, salicylic acid, strigolactones and cytokinins which able to accelerate or promote growth, but, some hormone-like abscisic acid has an adverse effect on growth which increases seed dormancy by inhibiting cell growth. Also, plant hormones are able to breakdowns dormancy for many plants and can alleviate abiotic stress (salinity, extreme temperatures and, drought,…) which led to enhance germination and improve growth for many plants, whether naturally occurring in the plant or by adding it to the plant in its artificially formed or in the form of bio-or nano-fertilization in order to increase the productivity and improve its efficiency under extreme conditions. Therefore, this chapter will highlight and will provide data for the positive or/and negative effect of these hormones on many plants to achieve a rapid germination method. It will also shed light on the relationship of these hormones to some enzymes to accelerate growth.

Abstract:The study was carried out to identify the etiological agents causing ringworm, evaluate the in vitro and in vivo antifungal activity of Lawsonia inermis L. In vitro study was carried out using agar dilution method. In a total of 50 clinical samples, 4 different species were identified namely; Microsporum canis, Trichophyton tonsurans, Trichophyton rubrum, and Trichophyton mentagrophytes. However, the results showed that hexane extract exerted a strong antifungal activity against all the identified etiological agents, with a minimum inhibitory concentration of 625µg/ml except Microsporum canis which resisted the minimum concentration but susceptible to the higher concentrations. The in vivo study was carried out using 15 naturally infected goats. First, second and third group of animals were treated with henna paste, aqueous and ethanolic extract respectively, fourth group were treated with clotrimazole as a positive control while negative control (fifth) group were left untreated with neither henna nor clotrimazole. The treatments were compared and the results showed that henna paste had the highest efficacy against all the types of ringworm tested compared to the remaining treatments. Disappearance of lesion and complete repair of the hair was observed at 30 days after treatment. Significantly similar result was observed in the group of animals treated with aqueous extract, ethanol extract, and clotrimazole in all the parameters. Significant different was only observed between groups treated and negative control.