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RESUMO A deficiência de B pode diminuir a fertilidade das flores, prejudicando a produtividade de sementes de trigo. O trabalho objetivou avaliar a produção e a qualidade fisiológica de ABSTRACT Boron deficiency can decrease fertility of flowers, harming productivity of wheat seeds. The experiment was conducted in didactic laboratory seed testing and in the greenhouse, both located in the municipality of Capão do Leão (RS). The objective of this study was to evaluate the production and physiological quality of wheat seed produced on time and doses of B application.The experimental design was completely randomized, with four replications in a factorial arrangement involving application stage (seeding and tillering), and B doses (0, 1, 2, 3, 4 and 5kg ha -1

O objetivo deste trabalho foi avaliar a influência da profundidade de semeadura sobre a expressão do vigor de sementes e desempenho inicial de plantas de canola. Os tratamentos constaram de cinco níveis de profundidade de semeadura, sendo 10; 20; 30; 40 e 50 mm. A influência da profundidade foi avaliada pela emergência, índice de velocidade de emergência, matéria seca de parte aérea e de raízes, razão de área e de massa foliar e razão parte aérea e raiz. Para emergência, índice de velocidade de emergência, matéria seca de parte aérea e raízes e, razão entre parte aérea e raízes, os resultados foram superiores na profundidade de 10 mm, decrescendo a partir dos 20 mm. A razão de área e de massa foliar diminuiu após a profundidade de 40 mm. A profundidade de 10 mm possibilitou condições mais favoráveis, permitindo maior expressão do vigor de sementes e desempenho inicial plantas.

Salt stress in rice plants affects growth, development and crop yield. However, seed treatment can reduce the deleterious effects caused by salt stress. The use of amino acids in agriculture has increased, both in Brazil and in other countries, due to higher productivity and provide better quality of plants treated with amino acids. The objective of this study was to evaluate the effect of amino acid coating on the physiological potential of rice seeds under salt stress. The experimental design was a completely randomized three-way factorial design with two batches of seeds, two levels of amino acid treatment (with or without amino acid) and five salt concentrations (0.0, 25.0, 50.0, 75.0 and 100.0 mM) with four replicates. The physiological quality of seeds was assessed by a germination test, first germination count, cold test, accelerated aging, seedling shoot and root lengths, and dry weight of shoots and roots. It is concluded that the seed treatment with amino acids results in better physiological performance of rice seeds when subjected to salt stress, which affects negatively the physiological quality of seeds.

The objective of this work was to evaluate the effects on the physiological attributes of soybean seeds submitted to the seed treatment with addition of insecticide, polymers and micronutrients throughout the storage. The experimental design was completely randomized in a factorial scheme, with four seed treatments per two seasons of storage of the seeds. The analysis of variance revealed a significant interaction among seed treatments and storage times for both cultivars at 5% of probability, referring to the characteristics of shoot length (SL), primary root length (RL), shoot dry mass (SDM) and dry mass of the primary root (RDM) for the cultivar Fundacep 37 RR. Addition of seed treatments influences the physiological performance of seedlings originated from soybean seeds stored for 240 days. The shoot and primary root lenghts, and shoot dry mass express the isoenzyme esterase through the aerial part and primary root of the seedling, the malate dehydrogenase is expressed in the primary root while in the peroxidase it is evident in the shoot of the seedlings.