Banca de DEFESA: LAYZZA ROBERTA ALVES MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LAYZZA ROBERTA ALVES MEDEIROS
DATE: 30/05/2022
TIME: 09:00
LOCAL: Defesa com apresentação via googlemeet
TITLE:

Use of Microorganisms to Assist in the Production of Tomato Seedlings

KEY WORDS:

Tomato, growth promotion, inoculant

PAGES: 70
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Microbiologia e Bioquímica do Solo
SUMMARY:

With the growth of the vegetable market and the concern with a healthier and safer diet, there is an increasing search for sustainable means of production, free from excess conventional chemicals. Tomato (Lycopersicon escolentum) is a crop of great economic importance in Brazil and worldwide. The use of microorganisms as plant growth promoters can contribute to increase the efficiency in the use of fertilizers and to reduce the use of chemical products. There are several groups of microorganisms that have the potential to be used in agriculture, and can be used both in biological control and in promoting plant growth. Its action can be carried out in different ways, such as mycorrhizal associations, biological nitrogen fixation (BNF), solubilization or mineralization of nutrients such as phosphorus, production of volatile organic compounds or phytohormones that stimulate the growth and development of the plant and even act as protection against pathogens. The objective of this work was to evaluate the potential of the microorganisms Azospirillum baldaniorum, Paraburkholderia nodosa, Bacillus subtilis, Torulaspora indica and Microvirga vignae as growth promoters of tomato seedlings. Two experiments were carried out to evaluate agronomic variables: seedling height, root volume, leaf area, root and shoot dry mass and analysis of nitrate reductase and acid phosphatase enzymes. In the experiment conducted in the winter of 2020, the microorganisms showed significant differences (P<0.05) for seedling growth, with the highest averages at 15 days: Bacillus subtilis (8.15cm), Paraburkholderia nodosa (8.56cm) and Azospirillum brasiliense (8.45cm). In the variable root volume at 35 days in the first experiment, Bacillus subtilis stood out with 0.3280cm³ of root. In the second experiment, Torulaspora indica provided an improvement in several variables with an average of 0.2088cm³ in root volume, 12.28cm² in leaf area, and 0.1006g/plant of shoot dry mass, demonstrating increases in productivity and , therefore, its potential as a growth promoter of tomato seedlings.

BANKING MEMBERS:
Presidente - 927.881.579-91 - JERRI ÉDSON ZILLI - EMBRAPA
Interno - 2213075 - EVERALDO ZONTA
Externa à Instituição - MARCIA REED RODRIGUES COELHO