Seed quality of Amburana cearensis (Allemão) A.C. Sm. (Fabaceae) is influenced by storage condition

Abstract

ABSTRACT-The aim of this study was to evaluate the effects of storage conditions on the germination of A. cearensis seeds. The experimental design was completely randomized into split plots over time with four replicates. The storage conditions of the airtight containers in the refrigerator and laboratory, paper bags in the laboratory and liquid nitrogen were assessed for 27 months. In the laboratory, we evaluated the germination, the germination rate, uniformity of germination, and total soluble and reducing sugars in the radicle. In the greenhouse, we evaluated seedling emergence, emergence rate and height of 30-day-old seedlings. Seeds stored in the refrigerator maintained a high initial germination rate, which decreased from the 21 st month. Seeds stored in paper bags in the laboratory showed low emergence and small seedlings. Total soluble sugars and reducing sugars were mobilized when the seeds were stored at low temperatures. Thus, it is not advisable to store A. cearensis seeds in a laboratory environment without airtight containers. A. cearensis seeds kept in a refrigerated environment maintained their viability for at least two years.Index terms: caatinga, conservation, emergence, Leguminosae, umburana-de-cheiro.A qualidade de sementes de Amburana cearensis (Allemão) A.C. Sm.(Fabaceae) é influenciada pelas condições de armazenamento RESUMO-O objetivo deste trabalho foi avaliar os efeitos das condições de armazenamento sobre a germinação de sementes de A. cearensis. O delineamento experimental foi inteiramente casualizado em parcelas subdivididas ao longo do tempo com quatro repetições. As condições de armazenamento como recipiente hermético no refrigerador; recipiente hermético em laboratório, sacos de papel em laboratório e nitrogênio líquido foram avaliadas durante 27 meses. No laboratório foram avaliadas germinação, taxa de germinação, uniformidade de germinação, açúcares solúveis totais e redutores da radícula. Em casa de vegetação avaliou-se emergência das plântulas, taxa de emergência e altura de mudas no decorrer dos 30 dias. As sementes armazenadas no refrigerador mantiveram alta germinação inicial e diminuíram a partir do 21º mês. O armazenamento de sementes em sacos de papel em laboratório apresentou baixa emergência e menores mudas. Os açúcares solúveis totais e os açúcares redutores são mobilizados quando as sementes são armazenadas a baixas temperaturas. Não é aconselhável armazenar sementes de A. cearensis em ambiente de laboratório sem um recipiente hermético. As sementes de A. cearensis mantidas em ambiente refrigerado mantêm a viabilidade durante pelo menos dois anos.

Conservation and physiological quality of Handroanthus spongiosus (Rizzini) S. Grose (Bignoniaceae) seeds

“…Seeds of some species of the Caatinga biome tolerate liquid nitrogen storage for periods above 24 months without losing their physiological quality, as is the case of Amburana cearensis (Allemão) AC Sm. (Araujo et al, 2017). This is probably because ultralow temperatures practically cease cell metabolism (Garcia et al, 2014).…”

“…Thus, conservationist strategies for threatened species have been developed and applied as alternatives for ex situ conservation through seed or seedling production in different times of the year (Shen et al, 2015). Therefore, determining conservation strategies for seeds of threatened wild species is required and involves the maintenance of their viability and physiological potential during storage (Araujo et al, 2017).…”

Stored diaspores of Astronium urundeuva Fr. (M. Allemão) Engl. (Anacardiaceae) submitted to hydropriming

“…Storage at low temperatures proved to be an efficient technique to prevent the mobilization of seed reserve compounds in Amburana cearenses (Allemão) AC Sm. (Fabaceae) (Araujo et al, 2017). It also kept the viability of A. urundeuva diaspores for up to four months (Oliveira et al, 2018) and guaranteed good seedling emergence of Adenanthera pavonina L. (Fabaceae) (Gugé et al, 2019).…”

Physiological Quality of Stored Dipteryx alata Vogel Seeds: Tetrazolium Test and Radiographic Imaging Standardization

“…No interaction between time and temperature was observed, however, lower emergence percentages were observed at 20 °C (73%) (Figure 4 D). In the studies carried out by Araújo et al (2017) with seeds of Amburana cearensis (Allemão) A.C. Sm., there was reduction in the percentage of emergence when maintained at 25 ºC, counterpart, the seeds of Amburana cearensis stored in a refrigerated and hermetically sealed environment remained viable for up to 24 months, corroborating the results of the present study.…”