An Efficacy of Plant Growth Substances on Vegetative Growth Traits and Fruiting Behaviour in Strawberry c.v. Winter Down under Open Condition

An experiment has been undertaken in the year of 2021 and 2022, to investigate about an efficacy of plant growth substances on vegetative growth traits and fruiting behaviour in strawberry c.v. Winter Down under open condition. This research work has been done under Randomized Block Design (RBD) having thirteen treatments viz. GA 3 50, 75 and 100 ppm, promalin concentration such as 4, 6 and 8 ppm, GA 4+7 with10,15 and 20 ppm, NAA at 15, 20, 25 ppm and control (water spray) and every treatment was replicated three times. Result showed the strawberry plants treated by 20 ppm GA 4+7 fourteen days before blooming positively find out the highest plant height (33.33 cm) , leaf area (238.59 cm2), number of flower plant-1(30.76) as compared to control. Plant treated by 8 ppm promalin has also revealed positive results as compared with water spray. Therefore, this has been concluded that the application of 20 ppm GA 4+7 applied fourteen days before blooming is significant for vegetative growth traits and fruiting of Winter Down cultivar of strawberry.

Overcoming dormancy in stored and recently harvested Passiflora cincinnata Mast. seeds / Superação de dormência em sementes de Passiflora cincinnata Mast. armazenadas e recém-colhidas

The treatment of seeds using growth regulators can overcome seed dormancy and increase the emergence and development of seedlings. The objective of this research was to evaluate the effect of different concentrations of GA4+7 + N-(phenyl methyl)-aminopurine on the dormancy breaking of Passiflora cincinnata Mast. seeds recently harvested and stored for six years. The study was conducted in a greenhouse at Embrapa Cassava and Tropical Fruits, in completely randomized design, in a 2 x 4 factorial scheme, with the following factors: year of seed harvest (2010 and 2016) and the emergence promoter GA4+7 + N-(phenyl methyl)-aminopurine at four concentrations (0%; 0.03%; 0.45% and 0.90%), with 4 replicates of 25 seeds. Emergence percentage, first count, emergence speed index, number of leaves, root length, stem diameter, dry matter of shoots, roots and total, and root/shoot ratio were evaluated. The results showed that GA4+7 + N-(phenyl methyl)-aminopurine is recommended to overcome dormancy of Passiflora cincinnata in recently harvested seeds (2016) and increase the emergence of seedlings from seeds stored for six years in cold chamber (2010). The emergence promoter concentration of 0.03% can be used to overcome dormancy in recently harvested seeds and maintains the vigor of seeds stored for six years. Passiflora cincinnata seeds remain physiologically viable for six years and their emergence is potentiated by the use of GA4+7 + N-(phenyl methyl)-aminopurine.

O tratamento de sementes com reguladores de crescimento pode superar a dormência das sementes, aumentar o vigor e o desenvolvimento das mudas. O objetivo desta pesquisa foi avaliar o efeito de diferentes concentrações de GA4 + 7 + N- (fenilmetil) -aminopurina na quebra de dormência de sementes de Passiflora cincinnata recentemente colhidas e armazenadas por seis anos. O estudo foi conduzido em uma estufa na Embrapa Mandioca e Fruticultura, em delineamento inteiramente casualizado, em esquema fatorial 2 x 4, com os seguintes fatores: ano de colheita de sementes (2010 e 2016) e promotor de emergência GA4 + 7 + N - (fenilmetil) - aminopurina em quatro concentrações (0%; 0,03%; 0,45% e 0,90%), com 4 repetições de 25 sementes. Foram avaliados a porcentagem de emergência, a primeira contagem, o índice de velocidade de emergência, o número de folhas, o comprimento da raiz, o diâmetro do caule, a matéria seca da parte aérea, das raízes, total e a relação raiz/parte aérea. O GA4 + 7 + N - (fenilmetil) - aminopurina é recomendado para superar a dormência de Passiflora cincinnata em sementes recentemente colhidas (2016) e aumenta a emergência de sementes armazenadas por seis anos em câmara fria. A concentração do promotor de emergência de 0,03% pode ser usada para superar a dormência em sementes recentemente colhidas e potencializa o vigor das sementes armazenadas durante seis anos. As sementes de Passiflora cincinnata permanecem fisiologicamente viáveis por seis anos e seu vigor é potencializado pelo uso de GA4 + 7 + N - (fenilmetil) - aminopurina.

Efeito da promalina (6BA+GA4+7) no crescimento e no desenvolvimento de frutos de macieira (Malus domestica, Borkh.) cv. Gala / Effects of promalin (6BA+GA4+7) on growth and development of apple fruits (Malus domestica, Borkh.) cv. Gala

Com o objetivo de avaliar o efeito da aplicação de Promalina (GA4,7+BA) sobre variáveis de rendimento em macieira conduziu-se um experimento no município de Porto Amazonas, na região sul do Paraná, na safra 2003/04. A área experimental constituiu-se da cultivar Gala, com três anos de idade, enxertada em Maruba com filtro M9 no espaçamento 4m x 1,4m. Foram avaliadas as variáveis: comprimento, massa fresca e diâmetro do fruto, sólido solúveis (SS) e firmeza da polpa. Para as variáveis estudadas não foram observadas variações significativas. A falta de ganho de peso e de modificação da forma do fruto não permite validar o uso da Promalina para as condições do centro sul do Paraná

The aim of the current manuscript was to analyze the effect of application of Promalinâ(GA4,7 + BA) onyield parameters of apple crop in a trial carried out at Porto Amazonas, Southern region of Paraná State.The trees were three year old grafted onto Maruba rootstock spaced 4 m x 1.4 m. The variables evaluatedwere length, fresh mass and diameters of the fruit, soluble solids (SS) and flesh firmness. For all thevariables no significant changes had been observed. The lack of weight increase and without changesin fruit shape do not allow to validate Promalin use for Parana Central Southern conditions