CONSERVATION OF SEEDS OF Myrcianthes pungens (Berg) Legr. IN DIFFERENT PACKAGING IN A CONTROLLED ENVIRONMENT1

Abstract

Studying the physiological and biochemical behavior of Myrcianthes pungens seeds stored in different packages for up to ten months was the objective of this work. Seeds were collected in Toledo, Pato Bragado, and Marechal Cândido Rondon and stored in a cold and dry chamber (11 ºC and 6,3% RH) for ten months. The germination test and the germination speed index (GSI), the seedling length (SL), the seedling dry matter mass (DMS), and the tetrazolium (ZT) test were performed and, for each evaluation, the water content was determined. Non-parametric analysis was used. During storage, the water content of the seeds in the plastic and glass containers varied little, but decreased in the paper packaging. The germination was maintained for ten months when the seeds were stored in plastic containers and for two months in the glass and paper ones. The variables GSI, SL, and DMS presented upwards and downwards variations during the storage period. The ZT revealed that, in the plastic packaging, the seeds remained viable for up to ten months, in glass, up to two months, and in paper, up to four months. Therefore, seeds of Myrcianthes pungens with high initial quality can be stored in a cold and dry chamber in plastic bags, maintaining viability and vigor for a period of ten months

Storage potential of African mahogany seeds under different environmental and packaging conditions

“…The storage of seeds in glass containers allowed for smaller fluctuations in water content in both environments, as glass is an impermeable container that does not allow water exchange (Martins et al, 2009). Similar results were observed in recalcitrant M. pungens forest seeds stored for 10 months in polyethylene packaging, as the water content of the seeds was increased by 6% over the storage period because of the semipermeability of polyethylene packaging (Gibbert et al, 2019).…”

“…Therefore, determining the best form of storage is necessary for the logistics, commercialization, and conservation of genotypes, especially African mahogany, in germplasm banks for research purposes and to prevent inconsistent seed production (Carvalho et al, 2016;Silva et al, 2020). One viable alternative is the preservation of seeds in a controlled environment in a suitable packaging, which acts as a barrier for gas exchange and helps to maintain the seed quality (Marcos-Filho, 2015;Gibbert et al, 2019).…”

“…The best form of storage has been evaluated in the seeds of forest species, Myrcianthes pungens, Schinus terebinthifolius, and Caesalpinia ferrea, and polyethylene and glass packaging have been determined to improve the maintenance of the physiological quality of seeds; these combined with controlled temperature and humidity have been reported to prolong the maintenance period up to six months for C. ferrea (Oliveira et al, 2018;Gibbert et al, 2019, Silva et al, 2019. Therefore, we aimed to determine the appropriate environmental and packaging conditions for the storage of African mahogany seeds in the present study.…”

Chickpea seed storage in different packagings, environments and periods

“…On the other hand, in environments without humidity and temperature control, the humidity in the air may be sufficient to promote the resumption of embryonic development (Gibbert et al, 2019).…”

Tolerância à dessecação e armazenamento de sementes de Myrcianthes pungens (O. Berg) D. Legrand (Myrtaceae)

“…A despeito de não terem sido realizados trabalhos específicos sobre tolerância à dessecação nessa espécie, que permitissem identificar o menor teor de água tolerado, as sementes de M. pungens são consideradas sensíveis à dessecação (recalcitrantes), fotoblásticas positivas e, dependendo das condições ambientais, podem ser armazenadas por até 10 meses (Santos et al 2004, Fior et al 2010, Gibbert et al 2019. Evidentemente este período é insuficiente para sua inserção em bancos de germoplasma, necessitando estudos que procurem compreender o processo de deterioração dessas sementes, bem como sua tolerância à dessecação.…”