Dehydration tolerance and storage sensitivity of Campomanesia adamantium seeds

Cultivating native fruit species depends on the existence of technical and scientific information. In this context, studies on propagation are the basis for other investigations. Campomanesia adamantium is propagated by seeds, and quality seeds guarantee the formation of high-performance plants in the field. This study aimed to analyze the dehydration tolerance and storage sensitivity of Campomanesia adamantium seeds. Experiment 1 evaluated the physiological quality of seeds with moisture contents of 43, 30, 26, 23, 18, 15, and 5%. Experiment 2 determined the seed moisture content, germination, and vigor of seeds depulped and immediately stored at 16 and 25°C, for 25 and 50 days. Seed viability was not affected by dehydration up to 15% of moisture content but decreased at 5%. Drying was accompanied by reduced seed vigor and seedling mass. The germination of unstored seeds was superior to stored ones. Storage at 16°C for 25 days was promising to maintain seed viability. The seeds showed intermediate recalcitrant behavior. Dehydration below 30% reduced vigor, while 5% affected viability. Campomanesia adamantium seeds can be stored for 25 days at 16°C in permeable packaging that maintains approximately 10% of moisture, with germination higher than 60%.

Desempenho de cultivares de couve-flor de verão em Ipameri / Performance of cultivars of cauliflower summer in Ipameri

Com o propósito de avaliar o comportamento de seis cultivares de couve-flor de verão, quanto à produção e resistência à podridão negra (Xanthomonas campestris pv. campestris), instalou-se um experimento em campo, em Ipameri-GO, com o delineamento experimental em blocos completos casualizados com seis tratamentos e quatro repetições. Cada parcela experimental, de 10m², constou de 20 plantas distribuídas no espaçamento de 1,0m entre linhas e 0,5m entre plantas. Foram avaliadas as cultivares: híbridos 'Cindy', 'Sarah AF-1169', 'Sharon', 'Verona', 'Lisvera' e a variedade Piracicaba precoce. Os híbridos Verona e Sharon mostraram-se promissores para cultivo nas condições edafoclimáticas em que foram avaliados, com produtividades de 34,17 e 30,64t ha-1, respectivamente, e com moderados níveis de resistência à podridão negra. A variedade Piracicaba precoce apresentou produção inferior às dos melhores híbridos avaliados e moderada resistência à podridão negra. O híbrido Sarah não é recomendado para plantio na região de Ipameri-GO por apresentar baixa produção e baixa resistência à podridão negra.

In order to evaluate the behavior of six cultivars of cauliflower summer, as production and resistance to black rot (Xanthomonas campestris pv. campestris), installed a field experiment in Ipameri-GO, with the experimental in randomized complete blocks with six treatments and four replications. Each plot of 10m², consisting of 20 plants distributed at a spacing of 1.0m between rows and 0.5m between plants. We evaluated the cultivars: hybrids 'Cindy', 'Sarah AF-1169', 'Sharon', 'Verona', 'Lisvera' and the variety Piracicaba precoce. Hybrids Verona and Sharon proved promising for cultivation in the environmental conditions that were evaluated, with yields of 34.17 and 30.64t ha-1 respectively, and moderate levels of resistance to black rot. The variety Piracicaba precoce showed lower production of the best hybrids and moderate resistance to black rot. The hybrid Sarah is not recommended for planting in the region of Ipameri-GO due to its low production and low resistance to black rot.