Abstract
The objective of this paper was to determine the physiological behavior and seed quality of five genotypes of Acca sellowiana regarding desiccation. Seeds were obtained from five plants of urban backyards in the cities of Dois Vizinhos - PR (A1, A2) and Vacaria - RS (A3, A4, A5). The experiment was conducted in a bifactor arrangement (5x3), with five genotypes and three levels of water content (28%, 15% and 5%), arranged into complete randomized block design, with four replicates of 50 seeds each. Seeds were germinated on absorbent paper soaked with water, being kept in BOD chamber under temperature of 25±3°C with photoperiod of 16 hours. Germination percentage, speed index and average time were assessed by counting seeds every two days for 50 days, starting from the moment of radicle emergence. No significant differences were observed for germination percentage and all genotypes surpassing 79% of germination. Desiccation of seeds had low influence on germination speed index and average time of germination, although genotype influence was verified due to genetic variability. Genotype A5 has seeds with superior quality from the others. Acca sellowiana seeds have orthodox behavior.
Highlights
Studies aiming to understand behavior of seeds during storage involving native species have enabled the proper management of seed batches (Donazzolo et al, 2015)
Regarding the weight of a thousand seeds (WTS), differences were observed between the seeds of the evaluated A. sellowiana genotypes (Table 1)
The A1 genotype was the one with the highest weight (8.58g) and the genotype A5 that presented the smallest WTS (5.12g), in relation to the other genotypes the A. sellowiana evaluated
Summary
Studies aiming to understand behavior of seeds during storage involving native species have enabled the proper management of seed batches (Donazzolo et al, 2015). Considering that not all seeds are tolerant to desiccation, prior knowledge on physiological behavior is necessary for successful conservation (Marques et al, 2019). This is due to the need to conserve seeds for several purposes, and it demands development of research related to their physiological classification. As well as on which conditions are ideal for their storage allow for the extension of their use period, contributing to the conservation of species germplasm (Da Silva et al, 2017). Right after cellular expansion happens, with accumulation of reserves, mostly
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