Seed position and influences on Caesalpinia pulcherrima germination and reserve proteins

Abstract

Caesalpinia pulcherrima has diverse uses in the world, including ornamental and landscape characteristics, but there is a great disparity of germination during the time of seedlings production, being this factor attributed to the position of the seeds in fruits. This study aimed to evaluate some germinative aspects and concentration of reserve proteins in C. pulcherrima seeds in the function of its position in fruits. The work was carried out in greenhouse, in a completely random experimental design, with five seed position in the pod, based on the distance from seed to the peduncle (P1 - distal, P2 - distal/median, P3 - median, P4 -proximal/ median, P5 - proximal). Eight replicates with eight seeds each, were sowed to germinate for 21 days in expanded polystyrene trays filled with substrate. The percentage, speed index, average germination time and 50% germination time of the plantlets were evaluated. The reserve proteins (albumin, globulin, prolamin and glutelin) contents were also determined. There was influence of the position of the seed in the fruit on germination and reserve proteins contents. The proximal/median position showed excellent results, having correlations of albumin, globulin and glutelin concentrations with some germinative parameters. Therefore, the use of proximal/median position of the seeds is recommended for C. pulcherrima propagation.

Use of seaweed-based biostimulant (Ascophyllum nodosum) on ornamental sunflower seed germination and seedling growth

“…Similar effects to the present study were observed in other crops by Gehling et al (2017) in soybean (Glycine max) and Gehling et al (2014) in wheat (Triticum aestivum), as the authors verified that higher concentrations of A. nodosum seaweed extract improved seed germination. The germination rate and mean germination time are inversely proportional; thus, higher the GSI means lower TMG (Santos et al, 2019); accordantly, seeds treated with 15 mL L -1 biostimulant germinated earlier (5.6 days) and higher speed (1.13). Seeds with high GSI and low TMG values are more resistant to the adverse germination conditions, as they germinate faster and the initial stage of development of seedling production is decreased (Oliveira et al, 2009).…”

“…The root length of soybean seedlings was not affected by seaweed extract, which is probably due to the volume of tray limiting root system growth and development (Gehling et al, 2017). The size and volume of the cells in germination tray directly affects root architecture, due to restricted area that limits root growth, which may compromise shoot growth and development (Santos et al, 2019).…”

Acute Toxicity Study of Bioactive Galactomannans From Two Non-Traditional Leguminosae Sources

“…The Leguminosae species Caesalpinia pulcherrima (L.)Sw. and Delonix regia (Bojer ex Hook.)Raf. are native from Central America and Madagascar, respectively, but they are widely used as ornamental plants around the world (Singh and Kumar 2014;Santos et al 2019). Their easily extractable galactomannans have been exploited as dietary ber, fruit edible coating, preparation of mucoadhesive microspheres, drug delivery systems and injectable regenerative hydrogels (Cerqueira et al 2009;Tamaki et al 2010;Lima et al 2010;Thombre and Gibe 2013;Buriti et al 2014;Ogunjimi et al 2017;Lima et al 2019).…”

Emergence and development of Dianthus chinensis and Limonium sinuatum seedlings on commercial substrate

“…According to Santos and Castilho (2018) and Maldaner et al (2019), an ideal substrate for ornamental species must present good conditions of aeration, pH, electrical conductivity, water retention capacity, nutritional availability, and density, in order to result in lower expenses and, consequently, increase healthy seedlings sale (Santos et al 2019).…”