Sweet pepper seed responses to inoculation with microorganisms and coating with micronutrients, aminoacids and plant growth regulators

Scientia Agricola, Jan 2009

Small sized seeds, such as the horticultural species, have limited quantities of reserves that can be balanced by coating then with essential nutrients for their initial development. In addition, inoculation of the seeds with microorganisms may protect the plants against phytopathogens, thus enhancing their growth. The present work had the objective of evaluate the physiological quality and seedling development of sweet pepper seeds and seedlings coated with several kind of films. Seeds were first coated with polymers and then with antagonistic microorganisms (Trichoderma viride, Trichoderma polysporhum, Trichoderma stromaticum, Beauveria bassiana, Metarhizium anisopliae), mycorrhizas, aminoacids, micronutrients and plant growth regulators. Evaluation was performed for percentage of germination and for seedling emergence, speed of emergence index, number of plants, dry mass of the aerial and root parts and height of the seedlings. Inoculation with Trichoderma viride increased the percentage and rate of the seedlings emergence Inoculation with Trichoderma viride, Metarhizium anisopliae and mycorrhizas promote better seedling development; seed microbiolization with microorganisms Trichoderma viride, T. polysporhum, T. stromaticum, Beauveria bassiana, Metarhizium anisopliae. Mycorrhizas mixture negatively affected seeds and seedling quality. Seed covering with plant growht regulator, at a 5 mL kg-1 dose increased the roots dry matter.

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Sweet pepper seed responses to inoculation with microorganisms and coating with micronutrients, aminoacids and plant growth regulators

CROP SCIENCE   Sweet pepper seed responses to inoculation with microorganisms and coating with micronutrients, aminoacids and plant growth regulators   Tratamento de sementes de pimentão com microrganismos, micronutrientes, aminoácidos e reguladores de crescimento     Kênia Almeida DinizI; Paulo de Albuquerque SilvaII; João Almir OliveiraI, *; José Renato Emiliorelli EvangelistaI IUFLA - Depto. de Agricultura, C.P. 37 - 37200-000 - Lavras, MG - Brasil IIEmbrapa Tabuleiros Costeiros/Unidade de Execução de Pesquisa - Campus Delza Gitaí, s/n, Zona Rural - 57100-000 - Rio Largo, AL - Brasil     ABSTRACT Small sized seeds, such as the horticultural species, have limited quantities of reserves that can be balanced by coating then with essential nutrients for their initial development. In addition, inoculation of the seeds with microorganisms may protect the plants against phytopathogens, thus enhancing their growth. The present work had the objective of evaluate the physiological quality and seedling development of sweet pepper seeds and seedlings coated with several kind of films. Seeds were first coated with polymers and then with antagonistic microorganisms (Trichoderma viride, Trichoderma polysporhum, Trichoderma stromaticum, Beauveria bassiana, Metarhizium anisopliae), mycorrhizas, aminoacids, micronutrients and plant growth regulators. Evaluation was performed for percentage of germination and for seedling emergence, speed of emergence index, number of plants, dry mass of the aerial and root parts and height of the seedlings. Inoculation with Trichoderma viride increased the percentage and rate of the seedlings emergence Inoculation with Trichoderma viride, Metarhizium anisopliae and mycorrhizas promote better seedling development; seed microbiolization with microorganisms Trichoderma viride, T. polysporhum, T. stromaticum, Beauveria bassiana, Metarhizium anisopliae. Mycorrhizas mixture negatively affected seeds and seedling quality. Seed covering with plant growht regulator, at a 5 mL kg-1 dose increased the roots dry matter. Key Words: Capsicum annum, film coating, microbiolization RESUMO Em sementes pequenas, como as de espécies hortícolas, as limitadas quantidades de reservas podem ser equilibradas por meio do seu recobrimento com nutrientes essenciais para o seu desenvolvimento inicial. Além disso, a inoculação dessas sementes com microrganismos, além de proteger as plantas contra fitopatógenos, pode promover o seu crescimento. Assim, objetivo do presente trabalho foi avaliar o efeito de tipos de revestimentos na qualidade de sementes e mudas de pimentão (Capsicum annum). Para tanto, as sementes foram primeiro revestidas com polímeros e depois foram adicionados microrganismos antagônicos (Trichoderma viride, Trichoderma polysporhum, Trichoderma stromaticum, Beauveria bassiana, Metarhizium anisopliae), micorrizas, aminoácidos, micronutrientes e reguladores vegetais. Avaliaram-se a porcentagem de germinação e de emergência, o índice de velocidade de emergência, o número de plantas, a massa seca de parte aérea e de raiz e a altura da parte aérea das mudas. A inoculação de sementes com Trichoderma viride aumentou a porcentagem e o índice de velocidade de emergência das plântulas; Trichoderma viride, Metarhizium anisopliae e as micorrizas inoculadas às sementes dessa espécie promovem melhor desenvolvimento das mudas; a microbiolização de sementes com a mistura dos microrganismos Trichoderma viride, T. polysporhum, T. stromaticum, Beauveria bassiana, Metarhizium anisopliae e micorrizas afetou negativamente a qualidade das sementes e mudas de pimentão e o revestimento dessas sementes com regulador vegetal, na dose de 5 mL kg-1 de sementes proporciona aumento na massa seca das raízes das plantas. Palavras-chave: Capsicum annum, peliculização, microbiolização     INTRODUCTION Until the mid of 1990s sweet pepper (Capsicum annum), was a crop with small commercial significance in Brazil. Since then, there was an increase trading of then in the market, as reported by CEAGESP (Bordin, 2002). In Brazil, 13,000 tons were produced in 2003, which having, therefore, a great demand for seeds. Melo et al. (2004), reported that only the seed national marked generated US$ 1,5 million in 2003. On the other way, organic agriculture has become a growing important option for farmers, as it meets the consumer demands on both national and international scale. Consumer claims for food organic foods have created market niches that cannot be overlooked anymore, especially by family producers that need to enlarge their income. Organic production in Brazil is estimated to generate from US$ 45 million to US$ 75 million a year, which accounts for the need for technological implementation, researches and marketing with such kind of activity. Within this context, seed treatment with microorganisms has been used in order to protect plants against phytopathogens and promote higher growth rat (...truncated)


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Kênia Almeida Diniz, Paulo de Albuquerque Silva, João Almir Oliveira, José Renato Emiliorelli Evangelista. Sweet pepper seed responses to inoculation with microorganisms and coating with micronutrients, aminoacids and plant growth regulators, Scientia Agricola, 2009, pp. 293-297, Volume 66, Issue 3, DOI: 10.1590/S0103-90162009000300002