Abstract
Brazil is the world's largest consumer and producer of passion fruit (Passiflora spp.). Its fruit is widely accepted by consumers mainly in terms of natura consumption, juices, and medicines. However, these plants are spread mainly via seminiferous propagation, in which low and uneven seed germination is verified. The objective of this work was to study seed performance and initial growth of Passiflora alata Curtis seedlings as a function of pre-germination treatments. Seeds of P. alata extracted from mature fruits harvested were used and manually extracted from the fruits, and the aryl was removed by rubbing in a stainless steel mesh sieve with quicklime, followed by drying in the shade on filter paper for 24 hours. The seeds were submitted to physical scarification and immersed in distilled water for 0; 24; 48; 72; 96; and 120 hours of stirring. The seed scarification method by cracking interferes negatively in the germination and initial growth of P. alata seedlings. Intact seeds had a higher percentage of germination as the stirring time of the seeds imbibed in water increased. The cracked seed treatment provided the highest averages when electrical conductivity was evaluated in the stirring time of 120 hours. Intact seeds immersed in distilled water with stirring for 120 hours provide greater germination and initial growth of P. alata Curtis seedlings.
Highlights
Brazil is the world's leading producer and consumer of passion fruit (Passiflora spp.), with a production of 703 tons, obtained in an area of 41000 hectares [1]. These species are native from tropical America, where Brazil presents excellent conditions for their cultivation, with more than 150 native species, being the yellow passion fruit
We evaluated the rate of germination (G), with daily counting of germinated seeds
The electrical conductivity is associated with the release of substances through the disorganization of cell membranes, in which high values of electrical conductivity suggest a higher exudation of organic solutes by the membranes and lower vigor of the seeds
Summary
Brazil is the world's leading producer and consumer of passion fruit (Passiflora spp.), with a production of 703 tons, obtained in an area of 41000 hectares [1]. These species are native from tropical America, where Brazil presents excellent conditions for their cultivation, with more than 150 native species, being the yellow passion fruit Brazil has been a major producer of yellow passion fruit in the last decades [3], which is cultivated mainly in small and medium-sized properties [4], mainly for use in family farming [5]. The cultivation of sweet passion fruit is noteworthy because it has great acceptance by the population, largely for its sweet taste and in natura consumption [6], which guarantees high market price
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