Abstract
ABSTRACT Lisianthus is an important ornamental species, whose cultivation in pot still requires studies, mainly regarding the use of alternative management. Thus, the aim of this work was to evaluate the influence of resistance elicitors on the production and post-production quality of potted lisianthus. Plants grown in pots were treated with two elicitors: (E1) phosphorylated mannano-oligosaccharide and (E2) citric bioflavonoids and phytoalexins, in the doses (D) of 1 and 2pL.L-1 (E1D1 1pL.L-1, E1D2 2pL.L-1, E2D1 1pL.L-1, E2D2 2pL.L-1 and control), with 5 replications, in a completely randomized design. After opening the first flower buds, the plants remained in the greenhouse for 15 days, until they reached at least 3 open flowers, when were transferred to the room conditions (24 ± 2 oC and 72 ± 2%) for another 15 days. The application of elicitors did not influence the culture cycle or the size of the stem. There was an increase, however, in the number of viable buds and open flowers, in addition to an increase in flower’s useful life paralleled to the reduction of senescent flowers, in relation to the control. The dose of 2pL.L-1 of the E2 kept the percentage of viable open flowers in relation to the control for at least another 5 days, reducing the percentage of senescent flowers. Together, with the application of the E2 elicitor in potted lisianthus, the viability of the flowers can be prolonged, maintaining quality and delaying senescence, and, in this way, increasing the market period.
Highlights
Lisianthus (Eustoma grandiflorum (Raf.) Shinn) is an ornamental plant that has been gaining space across the world due to the high attractiveness and vivid colors of the flowers (SAEEDI et al, 2015), standing among the 10 best selling products worldwide (LÓPEZ-GUERRERO et al, 2019)
Information about lisianthus cultivation in pots is still scarce both in Brazil (ALMEIDA; CALABONI; RODRIGUES, 2016) and in other producing countries (AHMAD et al, 2017; CASTILLO-GONZÁLEZ; VALDEZAGUILAR; AVITIA-GARCÍA, 2019), as well as the post-production behavior of potted plants (ÖZKAN; ÖZEN, 2016), which compromises the commercialization process. In this context, aiming at lisianthus pot cultivation and the best yield, parameters related to types of pruning (BACKES et al, 2006), management (CASTILLO-GONZÁLEZ; VALDEZ-AGUILAR; AVITIA-GARCÍA, 2019) must be defined, in addition to criteria to guarantee the best quality of the flower demanded by the markets (FERRANTE et al, 2015)
The use of resistance elicitors maintained the production cycle satisfactorily, compared to the use of nutrient solutions, or the cycle was inferior to those reported for this culture in other continents
Summary
Lisianthus (Eustoma grandiflorum (Raf.) Shinn) is an ornamental plant that has been gaining space across the world due to the high attractiveness and vivid colors of the flowers (SAEEDI et al, 2015), standing among the 10 best selling products worldwide (LÓPEZ-GUERRERO et al, 2019) This species is popular due to its beautiful morphological characteristics (YAN et al, 2019) and stands out for the production of single or double flowers in a great diversity of colors (AHMAD et al, 2017) and bicolors (ALMEIDA; CALABONI; RODRIGUES, 2016) with high productivity (SHEIKH, F. et al, 2014). To reduce the negative impacts of agriculture, it is important to reduce dependence on fertilizers, making it necessary to use safe practices, of lowercost and ecologically correct management in agricultural production (AHMED et al, 2020)
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