Abstract
ABSTRACT The genus Capsicum has varying levels of sensitivity to ethylene. Variability knowledge allows planning post-production methodologies of potted pepper plants and can be used in breeding programs. The objective of this study was to evaluate the ethylene sensitivity of three ornamental pepper genotypes of the germplasm bank of Universidade Federal de Viçosa. Pepper plants were exposed to 10 μL L-1 ethylene during 48 hours. The flowers were highly sensitive to exogenous ethylene in all genotypes except Pimenta colorida which was moderately sensitive. Regarding leaf abscission, Pimenta colorida and Pimentão ornamental are classified as highly sensitive to ethylene application. Already the fruits responded with the early appearance of the typical coloration when ripe, except for Pimenta laranja. When fruits fell, the highest rates were observed for green fruits, followed by ripe green and ripe fruits.
Highlights
Transport is the main factor affecting ornamental quality and longevity of ornamental pepper plants (França et al, 2018)
Plants of the genus Capsicum have different ethylene sensitivity levels (Lima et al, 2017). This hormone triggers a series of deleterious responses in potted pepper plants, among them the fruits and leaves abscission in different degrees as a reaction to genotype sensitivity to gas
Calypso is an ornamental pepper of high commercial value due to its great ornamental beauty as a potted plant, but when exposed to 10 μL L-1 ethylene during 24 to 48 hours there occurred 100% leaf abscission
Summary
Transport is the main factor affecting ornamental quality and longevity of ornamental pepper plants (França et al, 2018). Plant exposure to ethylene can cause leaf, flowers and fruits abscission (Sundaresan et al, 2015; Lima et al, 2017). Plants of the genus Capsicum have different ethylene sensitivity levels (Lima et al, 2017) This hormone triggers a series of deleterious responses in potted pepper plants, among them the fruits and leaves abscission in different degrees as a reaction to genotype sensitivity to gas. Segatto et al (2013) verified that the genotypes of ornamental pepper plants BGH 1039, BGH 7073, Calypso and MG 302 present different levels of ethylene sensitivity. Calypso is an ornamental pepper of high commercial value due to its great ornamental beauty as a potted plant, but when exposed to 10 μL L-1 ethylene during 24 to 48 hours there occurred 100% leaf abscission. The objective of this study was to evaluate the sensitivity of ornamental pepper genotypes to ethylene action and its effects on the quality of potted plants
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