Pigments in flower stems of lisianthus under different photoselective shade nets

Abstract

The lisianthus culture is demanded to produce cut flowers and pot vases, grown in a greenhouse using advanced techniques. The present study aimed to evaluate the pigments of different lisianthus cultivars in different photoselective shade nets. The cultivars Flare Deep Rose (pink), Echo Blue BL (purple) and Allemande White BI (white) were cultivated under light-diffusing polyethylene film cover and blue and red color photoselective nets with a shading capacity of 30%, in addition to the control treatment, without the use of the net. The results showed higher values of chlorophyll b and total in the red photoselective net, independent of the cultivar. Leaf colorimetry showed the most intense shade of green was from the cultivar Echo Blue BL. On the other hand, the control showed more intensity, with no significant difference in the leaf green intensity on the blue and red shade nets. In the petals, the cultivar Echo Blue BL showed a more intense blue shade in the red net, however low grade of anthocyanin than in the blue one. In the anthocyanin pigment, this cultivar had lower levels in the treatment of the red net. The results indicate that the use of photoselective shade nets in the culture of lisianthus changes the content of the pigments studied, in varying intensity, depending on the cultivar.

MOISTURE LIMITS AND POTASSIUM CONCENTRATIONS IN THE SOIL SOLUTION FOR CULTIVATION OF LISIANTHUS (Eustoma grandiflorum) FERTIGATED UNDER PROTECTED ENVIRONMENT CONDITIONS

“…As in the first cycle, the profiles that relate the variation in volumetric water content with time clearly show the pace of water consumption by the crop according to the stages of development. In addition, they allow the identification of the exact time when the irrigation was performed, as well as the quantification of the applied depth (Almeida et al, 2021). Therefore, the use of the TDR coupled with the data acquisition system (datalogger) allowed not only to obtain data related to the exposure of the lisianthus crop to critical levels of soil moisture, which would not be possible with the use of tensiometers, but also enabled the recording of instantaneous variations in soil moisture.…”

“…However, the activity already accounts for extremely significant numbers. Lisianthus (Eustoma grandiflorum), unlike what happens in other countries, is a crop that is still little studied in tropical climate conditions although it has great production and market potential (Almeida et al, 2021). The recent introduction of this species in the national market of ornamental plants has led to difficulties in its cultivation inherent to the scarcity of technical and scientific information about its production and management (Camargo et al, 2004).…”

Intelligent System for Monitoring Water Content and Solute Concentrations in Soil Cultivated with Fertigated Lisianthus

“…Different potassium concentrations managed in the soil solution did not provide significant differences corncerning the water consumption of the lisianthus crop. The profiles that relate the variation of the volumetric water content with time (Figure 2) clearly show the rhythm of water consumption by the crop according to the stages of development; in addition, they allow the identification of the exact moment when irrigation was performed, as well as quantification of the applied depth [13]. It is verified, therefore, that the use of the TDR technique coupled to the data acquisition system (data logger), in addition to making it possible to obtain data related to the exposure of lisianthus crop to critical levels of moisture in the soil, which would not be possible with the use of tensiometers due to the high tensions of the drier treatments, allowed the recording of instantaneous variations in soil moisture.…”

“…In the specific case of the lisianthus crop, a new and promising cut flower that has recently started to be produced in Brazil, both irrigation and fertigation practices have a major impact on the production and quality of stems and flower buds. However, many producers of this species of flowers produced in Southeastern Brazil have relied on empiricism or fertilizer recommendations of other countries, resulting in the application of insufficient or excessive amounts of water and fertilizers [12,13]. These actions have resulted in low crop yield, due to either deficit or excess moisture in the soil, contamination of the soil by the accumulation of excess nutrients, and soil salinization [14].…”