Effect of Pre-treatments on Seed Germination and Seedling Growth in Psidium guineense Swartz

Dresch, Daiane Mugnol; Scalon, Silvana de Paula Quintão; Neves, Eliane Marques da Silva; Masetto, Tathiana Elisa; Mussury, Rosilda Mara

doi:10.31285/agro.18.460

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…The highest fruit yields are at mean air temperatures of 23 to 28 • C (Menzel, 1985). These temperatures are also adequate for the germination of P. guineense seeds (Mugnol et al, 2014). Guavas are drought-resistant and well-adapted to different rainfall conditions, although optimal growth and fruit yield occur with 1,000 to 2,000 mm of rainfall well-distributed throughout the year (Menzel, 1985).…”

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confidence: 99%

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

et al. 2021

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Guava (Psidium guajava L., Myrtaceae) is a Neotropical fruit that is widely consumed around the world. However, its evolutionary history and domestication process are unknown. Here we examine available ecological, taxonomic, genetic, archeological, and historical evidence about guava. Guava needs full sunlight, warm temperatures, and well-distributed rainfall throughout the year to grow, but tolerates drought. Zoochory and anthropochory are the main forms of dispersal. Guava’s phylogenetic relationships with other species of the genus Psidium are unclear. A group of six species that share several morphological characteristics are tentatively accepted as the Psidium guajava complex. DNA analyses are limited to the characterization of crop genetic diversity within localities and do not account for possible evolutionary and domestication scenarios. A significant amount of archeological information exists, with a greater number and older records in South America than in Mesoamerica, where there are also numerous historical records. From this information, we propose that: (1) the guava ancestor may have originated during the Middle or Late Miocene, and the savannas and semi-deciduous forests of South America formed during the Late Pleistocene would have been the most appropriate ecosystems for its growth, (2) the megafauna were important dispersers for guava, (3) dispersal by humans during the Holocene expanded guava’s geographic range, including to the southwestern Amazonian lowlands, (4) where its domestication may have started, and (5) with the European conquest of the Neotropics, accompanied by their domestic animals, new contact routes between previously remote guava populations were established. These proposals could direct future research on the evolutionary and domestication process of guava.

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confidence: 99%

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

et al. 2021

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Araça— Psidium cattleyanum Sabine

Lopes

Silva

2018

Exotic Fruits

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Different Methods for Overcoming Integumental Dormancy during in vitro Germination of Red Araza Seeds

Freire¹,

Gardin²,

Baratto³

et al. 2016

JAS

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Red Araza, or Red Strawberry Guava (Psidium cattleianum Sabine) is a native Brazilian Atlantic Forest species of the Myrtaceae family, whose seeds exhibit integumental dormancy. Due to its importance to different industries worldwide, recent research efforts are seeking to expand this species' micropropagation processes using in vitro seedling germination, especially since in vitro micropropagation of adult plant material has, so far, been limited. This research effort evaluated different methods of overcoming integumental dormancy during in vitro germination of the Red Araza, so as to allow future micropropagation of the species. The seeds' emergence and vigor were evaluated based on mechanical and acid scarification, using different substrates and immersions in solutions with different levels of gibberellic acid (GA 3 ), and on the influence of the pre-immersion of seeds in water and sulfuric acid. The mechanical and acid scarification of the seeds, combined or separate, resulted in higher in vitro germination percentages and a higher germination rate index (GRI). Pre-immersion in distilled water (20 hours) also proved to be efficient for the germination of the Red Araza seed, with 76.2% of the seeds germinating and a higher speed of emergence (GRI = 0.18). When compared to a Murashige and Skoog (MS-zero) medium, sowing in a hydrophilic cotton substrate showed greater emergence and vigor, with approximately 70% of the seeds germinating. Treating the seeds by pre-immersing them in GA 3 turned out to be unnecessary. The methods used for overcoming integumental dormancy during in vitro germination of Red Araza seeds proved to be efficient, and could be used to develop micropropagation protocols of seminal origin for this species.

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Effect of Pre-treatments on Seed Germination and Seedling Growth in Psidium guineense Swartz

Cited by 3 publications

References 13 publications

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

The Taming of Psidium guajava: Natural and Cultural History of a Neotropical Fruit

Araça— Psidium cattleyanum Sabine

Different Methods for Overcoming Integumental Dormancy during in vitro Germination of Red Araza Seeds

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