Abstract
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.
Highlights
Lisianthus (Eustoma grandiflorum) is a species belonging to the Gentianaceae family and originates from northern Mexico and the Southeast United States
The purple cultivar showed a significant difference when compared to the control only in total chlorophyll
The results suggest that the blue spectrum is a key factor for anthocyanins biosynthesis and accumulation (Fu et al, 2020)
Summary
Lisianthus (Eustoma grandiflorum) is a species belonging to the Gentianaceae family and originates from northern Mexico and the Southeast United States. The use of photoselective shades in ornamental cultures such as marigold (Calendula officinalis L.) and violet (Viola tricolor) has been shown to affect vegetative grown, carotenoid content, and antioxidant activities, with promising results using the red color shade (Zare et al, 2019). Anthocyanins are a group of flavonoids that give the colors pink, red, blue and purple seen in flowers These pigments play an important role in the pollination and dispersion of fruits and seeds, besides, they have an antioxidant capacity that provides protection to plant tissues against biotic and abiotic stresses (Dini et al, 2019). In view of the foregoing, the present study was conducted to evaluate the effect of photoselective shade nets on the vegetable pigments in the cultivation of three lisianthus cultivars, Flare Deep Rose (pink), Echo Blue BL (purple), and Allemande White BI (white)
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