<b>Effects of silicon on the growth and genetic stability of passion fruit

Abstract

ABSTRACT. The objective of this study was to determine the silicon concentration that would provide good growth in passion fruit plants. Passion fruit seeds were sown in polystyrene. After 60 days, when they were approximately 15 cm tall, the plants were transplanted into polyethylene pots containing 1.1 kg Tropstrato® substrate. Treatments consisted of four concentrations (0, 0.28, 0.55, and 0.83 g pot -1 ) of silicon applied as a silicic acid solution 1%. This solution was applied around the stem of the plants (drenched), with the first application being administered 15 days after transplanting. In total, three applications were made at intervals of 15 days. After the last application, the plants were subjected to chemical analysis to determine the silicon concentration and to X-ray microanalysis and flow cytometry. Phytotechnical analyses were performed during the applications. The use of silicon in concentrations of 0.28 and 0.55 g pot -1 provides better growth of the passion fruit, and the absorption and deposition of the silicon in the passion fruit leaves are proportional to the availability of this element in the plant. The roots of the passion fruit plant are silicon accumulators, and the DNA stability and amount are preserved in the silicon-treated passion fruit plants. ) de silício, na forma de solução de ácido silícico a 1%. Esta solução foi aplicada ao redor do caule das plantas (drench), sendo a primeira aplicação realizada 15 dias após o transplantio das plantas. No total, foram realizadas três aplicações, em intervalos de 15 dias. Após a última aplicação, as plantas foram submetidas à análise química de concentração de silício, microanálise de raios-X e citometria de fluxo. As análises fitotécnicas foram realizadas no decorrer das aplicações. O uso do silício nas concentrações 0,28 e 0,55 g vaso -1 , proporciona melhor crescimento das plantas de maracujazeiro, a absorção de silício e sua deposição nas folhas de maracujazeiro são proporcionais à disponibilidade desse elemento para a planta, o maracujazeiro é uma planta acumuladora de silício nas raízes e a estabilidade da quantidade de DNA é preservada nas plantas de maracujazeiro tratadas com silício.Palavras-chave: citometria de fluxo, ácido silícico, Passiflora edulis.

The Effects of Foliar Boron and Silica Through the Leaves on Soybean Growth and Yield

“…3). This is in line with the research of Costa et al (2016) that foliar of Si with concentrations of 0.28 and 0.55 g pot -1 gives the effect of the number of leaves better than without Si.…”

Silicon and methyl jasmonate in the vegetative development and genetic stability of rice

“…In addition, the fine peak thickness obtained in the histograms was another indicator of the quality of the results found ( Figure 2). Although this is in reference of another plant species, the results corroborate Costa et al (2016), findings in which the use of silicic acid secured the genetic stability of yellow passion fruit vine (P. edulis Sims. f. flavicarpa Deg.…”

“…Flow cytometry is a fast and accurate technique used to estimate the quantity of DNA (Dolezel & Bartos, 2005) in several plant species such as Passiflora edulis Sims f. flavicarpa Deg. (Costa et al, 2016) and Saccharum spp. (Nogueira, Pio, Pasqual, Amaral, & Scherwinski-Pereira, 2015).…”

Silicon (Si) biochar for the mitigation of arsenic (As) bioaccumulation in spinach ( Spinacia oleracean ) and improvement in the plant growth

“…For example, Wang and Galletta (1998) reported the influence of Si on the growth of strawberries and observed that plants treated with Si developed shorter petioles but significantly more dry matter even at very low Si concentration (4.25 mM) in dosing solution. Recently, Costa et al (2016) also observed that Si concentrations of 0.28 and 0.55 g pot −1 (pots contained 1100 g of tropstrato(r) substrate) yielded the highest stem dry weight of 1.32 and 1.38 g respectively, in passion fruit, compared to 0.81 g of dry weight in the control treatment. Liang et al, (2015) also observed that the effects of Si on plant growth are often complemented by other factors such as pH adjustment and the acquisition of macro/micro nutrients contained in silicate fertilizers.…”