Classificação de sementes de espécies florestais dos gêneros Nectandra e Ocotea (Lauraceae) quanto ao comportamento no armazenamento

Carvalho, Letícia Renata de; Davide, Antônio Cláudio; Silva, Edvaldo Aparecido Amaral da; Carvalho, María Laene Moreira de

doi:10.1590/s0101-31222008000100001

Cited by 15 publications

(10 citation statements)

References 11 publications

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“…Additional studies are needed to create storage conditions that will favor the conservation of the viability of recalcitrant seeds for the largest possible period, because this information is important for seedling production programs to meet the growing demand, particularly for recovery projects of degraded areas (CARVALHO et al, 2008).…”

Section: Sena Lhm Et Almentioning

confidence: 99%

“…The continuous availability of viable seeds is essential to forest programs, such as reforestation and recovery of degraded areas, breeding programs in germplasm conservation for long periods, especially for endangered species, and research on technology and seed physiology (CARVALHO et al, 2008;FLORIANO, 2014). Therefore, the storage becomes basic in forming commercial plantations, because it allows using plant species in different times and different places of their origin (KOHAMA et al, 2006), ensuring the demand for seeds of species with irregular production, abundant in some years and scarce in others (CRUZ, 2012), seeking to maintain their maximum physiological, physical, and sanitary quality for future use.…”

Section: Introductionmentioning

confidence: 99%

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STORAGE OF PITOMBEIRA SEEDS [Talisia esculenta (A. St. Hil) Radlk - SAPINDACEAE] IN DIFFERENT ENVIRONMENTS AND PACKAGINGS

et al. 2016

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-This paper aimed to evaluate the effect of packaging, environments, and storage periods on physiological quality of Talisia esculenta (A. St. Hil.) Radlk seeds. Seeds were conditioned in PET transparent bottle, Kraft paper bag, and transparent polyethylene bag; they were stored in chamber (18 °C; 50% RH), in freezer (-21 ± 2 °C; 95% RH), and under laboratory natural environment (28 ± 5 °C; 65% RH). They were evaluated at the 0, 25 th , 50 th , 75 th , and 100 th storage day for moisture content, thousand seed weight, emergence percentage, emergence rate index, length, and dry mass of shoot and root. T. esculenta seeds should be stored in chamber or laboratory natural environment, packed in polythene bag up to 25 days. The Kraft paper bag and the PET bottle cannot be used for storing T. esculenta seeds. Freezer is not recommended for storing T. esculenta seeds because it makes them unviable.Keywords: Conservation; Native forest; Recalcitrant. ARMAZENAMENTO DE SEMENTES DE PITOMBEIRA [Talisia esculenta (A. St. Hil) Radlk -SAPINDACEAE] EM DIFERENTES AMBIENTES E EMBALAGENSRESUMO -Este trabalho teve por objetivo avaliar o efeito da embalagem, do ambiente e período de armazenamento sobre a qualidade fisiológica de sementes de Talisia esculenta (A. St. Hil.) Radlk. As sementes foram acondicionadas nas embalagens: garrafa pet transparente, saco de papel Kraft e saco de polietileno transparente em ambientes: câmara (18 °C; 50% UR do ar), freezer (-21 ± 2 °C; 95% UR do ar) e natural de laboratório (28 ± 5 °C; 65% UR do ar). Aos 0, 25, 50, 75 e 100 dias de armazenamento foram avaliados: teor de água, peso de mil sementes, porcentagem de emergência, índice de velocidade de emergência, comprimento e massa seca da parte aérea e raiz. Sementes de T. esculenta devem ser armazenadas em câmara ou ambiente natural de laboratório, embaladas em saco de polietileno por até 25 dias. A embalagem saco de papel Kraft e garrafa pet não devem ser utilizados para armazenamento de sementes de T. esculenta. O armazenamento das sementes de pitombeira em freezer não é recomendado, pois as tornam inviáveis.Palavras-chave:Conservação; Espécie nativa; Recalcitrante.

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Section: Sena Lhm Et Almentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

STORAGE OF PITOMBEIRA SEEDS [Talisia esculenta (A. St. Hil) Radlk - SAPINDACEAE] IN DIFFERENT ENVIRONMENTS AND PACKAGINGS

et al. 2016

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“…Mez, Nectandra oppositifolia Nees, Persea pyrifolia Nees & Mart., Nectandra nitidula Nees, Nectandra lanceolate Nees, Nectandra grandiflora Nees e Ocotea pulchella (Nees & Mart.) Mez with humidity varying from 38.3 a 50.4% (Carvalho 2006;Carvalho et al 2008); and the last five species can be stored for a few months when packed in semipermeable packaging in a cold chamber (5 o C temperature) and 60% relative humidity (Carvalho 2006).…”

Section: Discussionmentioning

confidence: 99%

Morpho-physiological classification of seeds and morphology of fruits and seedlings of Richeria grandis

et al. 2020

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The objective was to describe and characterize the fruit morphology, seeds, seedlings and germination of Richeria grandis. Mature fruits were collected from matrix trees located in gallery forests. After, morphological descriptions were performed. Biometric measurement of fruits and seeds were carried out. A total of 650 seeds were randomly separated, with 20% being used for germination and humidity testing on the same day of collection and the others stored for 5, 10, 15 and 20 days. The germination test was performed in a gerbox, conducted in a laboratory chamber of the type B.O.D (biochemical oxygen demand) with a photoperiod of 12h and a temperature of 25 ºC ± 1 ºC. Periodic observations were made to monitor the development of the seedlings until the first germinated seeds reached the full seedling stage. The fruit of R. grandis is a simple, dry, capsule type septifraga, dehiscent and schizocarpic, with average length of 16.24 mm and an average width of 8.57 mm. The seed is an ellipsoid shape, containing a sarcotesta and has an average length of 7.40 mm and an average width of 4.57 mm. R. grandis presents recalcitrant seeds, which emerge in a Phanero-epigene-foliaceous manner. The radicle breaks the integument on the second day after sowing, the collection is evidenced on the 10th day, separating the primary root from the hypocotyl. At day 16, the cotyledons expand from the forehead, positioned at a 90º angle to the hypocotyl. The protophyll and the epicotyl appear only after the 50th day, characterizing the complete seedling.

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“…In case of T. tepezapote, a closely related species T. brasiliensis has seeds with ecological longevity below 60 days (Pires, Cardoso, Joly, & Rodrigues, 2009). Inside the tropical forest, temperature could be almost constant above and beneath the litter (Va´zquez-Yanes & Orozco-Segovia, 1994), closer to 23 C than to 15 C. Among the other Nectandra species, some are classified as recalcitrant (de Carvalho, Davide, Silva, & Carvalho, 2008).…”

Section: Discussionmentioning

confidence: 99%

Seed Longevity of Five Tropical Species From South-Eastern Mexico: Changes in Seed Germination During Storage

Becerra-Vázquez

Sánchez‐Nieto

Flores-Ortíz

et al. 2018

Tropical Conservation Science

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To design conservation strategies, the extent of plant richness of tropical forests needs to be characterized in terms of their seed longevity. In this study, we examined the potential seed longevity, that is, storage ex situ, of species from southeastern Mexico: Chamaedorea glaucifolia, Cymbopetalum baillonii, Magnolia mexicana, Nectandra coriacea, and Ternstroemia tepezapote. Immediately after collection, seeds were stored at different temperatures (23 C). We evaluated seed germination after different storage durations. Seed water content (WC) was determined for each period. Seed desiccation sensitivity was determined as WC 50 , which is the WC at which the initial seed viability decreases to 50%; further, the time required to reach WC 50 was also determined. Subsequently, we analyzed the relations between seed functional traits with other morphological and functional traits, along with the weather characteristics of their respective habitat. All of the studied species had shortlived seeds; they exhibited desiccation sensitivity after storage with differences across the species. Additionally, C. baillonii exhibited differences in seed desiccation sensitivity across 2 years of seed collection. Interaction was observed between storage time and storage temperature: Seeds exhibited less deterioration at 15 C in C. glaucifolia and C. baillonii and at 5 C in M. mexicana and N. coriacea. Seed storage behavior is discussed in this article. Finally, a relationship determined between germination traits, and seed WC, embryo size, endosperm amount, and rain and temperature patterns in the month of seed dispersal explained the limited longevity of the studied species.

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Classificação de sementes de espécies florestais dos gêneros Nectandra e Ocotea (Lauraceae) quanto ao comportamento no armazenamento

Cited by 15 publications

References 11 publications

STORAGE OF PITOMBEIRA SEEDS [Talisia esculenta (A. St. Hil) Radlk - SAPINDACEAE] IN DIFFERENT ENVIRONMENTS AND PACKAGINGS

STORAGE OF PITOMBEIRA SEEDS [Talisia esculenta (A. St. Hil) Radlk - SAPINDACEAE] IN DIFFERENT ENVIRONMENTS AND PACKAGINGS

Morpho-physiological classification of seeds and morphology of fruits and seedlings of Richeria grandis

Seed Longevity of Five Tropical Species From South-Eastern Mexico: Changes in Seed Germination During Storage

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