&lt;i&gt;Qualea grandiflora&lt;/i&gt; Mart.: temperatura na germinabilidade de sementes

Bilio, Reinaldo Souza; Guimarães, Sebastião Carneiro; Caldeira, Sidney Fernando

doi:10.5902/198050988458

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…The temperatures of 15 and 30 °C were lower compared to the other temperatures tested, as observed for G. The low development of seedlings of these cultivars in extreme temperatures can be explained as a selection of biological nature, which prevents the development of the species in unsuitable environments (Bilio, Guimarães and Caldeira;.…”

Section: Test II -Temperature During Germination and Seed Vigor Testsmentioning

confidence: 71%

Metodologia padronizada para o teste de germinação em sementes de grão-de-bico (Cicer arietinum L.)

Rosa

Dias

Nascimento

et al. 2021

MSJ

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O presente trabalho objetivou estabelecer (atualizar) a metodologia para execução do teste de germinação em sementes de grão-de-bico, no que se refere ao substrato, temperatura ideal e data da primeira contagem. Para tanto, foram realizados três ensaios: I) avaliação de substrato; II) avaliação da temperatura de exposição das sementes durante a germinação; e III) averiguação da data de primeira contagem. Os experimentos foram organizados em delineamento inteiramente casualizado, esquema fatorial 6 x 3 (cultivares x substratos), para o ensaio I e 6 x 4 (cultivares x temperatura) para o ensaio II, ao final foram realizadas as análises de variâncias e as médias comparadas pelo teste de LSD. Para o ensaio III foi elaborado gráfico de contagem de plântulas normais, avaliando a porcentagem de germinação. Os parâmetros analisados foram: germinação, índice de velocidade de germinação e tempo médio de germinação, nos ensaios I e II. No ensaio III apenas germinação. Foram observadas maiores porcentagens de germinação, e aumento na velocidade de germinação quando utilizado o substrato rolo de papel. As temperaturas extremas não se mostraram favoráveis ao processo de formação de plántulas. De acordo com os resultados obtidos recomenda-se a utilização de rolo de papel, à 20 °C e com data de avaliação da primeira contagem aos 6 dias após a semeadura para teste de germinação.

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Section: Test II -Temperature During Germination and Seed Vigor Testsmentioning

confidence: 71%

Metodologia padronizada para o teste de germinação em sementes de grão-de-bico (Cicer arietinum L.)

Rosa

Dias

Nascimento

et al. 2021

MSJ

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“…(Rosseto et al, 2009), Qualea grandiflora Mart. (Bilio et al, 2013) and Theobroma grandiflorum (Willd. ex Spreng.)…”

Section: Discussionmentioning

confidence: 99%

A comparative study of the thermal ranges of three germination criteria of a tropical tree with bioeconomic interest: Carapa surinamensis Miq. (Meliaceae)

Amoedo

Ferraz

2019

Braz. J. Biol.

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Species of the Carapa spp. complex, occurring in the Neotropics, Africa and India, have multiple uses, including timber, with the seed oil being used in phyto-pharmaceutical products and cosmetics. This study aimed to determine the thermal ranges of the germination process, comparing germination criteria used by seed physiologists and seed technologists, and to suggest recommendations for seed quality assessment. Germination was assessed at constant temperatures between 10 ─ 40 °C using three germination criteria: (1) radicle length ≥ 0.5 cm (physiological criterion); (2) epicotyl length ≥ 1 cm; and (3) epicotyl length ≥ 5 cm (criterion for seed quality tests). The base temperature was similar for the three criteria and ranged between 10 ─ 2 °C. The Maguire's Speed Index indicated 30 °C as most adequate. However, the upper temperature limit differed: for radicle protrusion it was above 40 ºC; and for both epicotyl lengths, it was between 35 ─ 40 °C. Seed coat removal accelerated the germination process of these recalcitrant seeds, and is recommended for seed quality assessment, which allows completion of the germination trial in approximately one month.

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“…This resistance to high temperatures is necessary because of the occurrence of air and soil surface temperatures of up to 350 °C during fire, depending on the fuel load (Miranda et al 1993). However, fire can also promote germination by breaking seed dormancy (Bilio et al 2013, Ribeiro & Borghetti 2014. The observed seed attributes and seed mass, therefore, increase seeds' tolerance to environmental stress and are likely to contribute to the recruitment of the tree species in the harsh environments of the cerrado (Bond & Keeley 2005, Ribeiro & Borghetti 2014.…”

Section: Seed Storagementioning

confidence: 99%

“…Ribeiro & Borghetti (2014) demonstrated the great tolerance of Q. grandiflora seeds to extremely high temperatures and desiccation, achieving high germination rates of 63% to 71%. Experimental studies by Bilio et al (2013) and Dousseau et al (2013) showed that temperatures of 25 to 30 °C lead to the highest germination rates under controlled conditions, irrespective of the presence or absence of light (Zaidan & Carreira 2008). In order to survive, seedlings must develop deep roots before the next dry season starts (Rizzini 1965, Salazar 2010.…”

Section: Germination and Development Of Early Seedling Stagesmentioning

confidence: 99%

Ensuring future regeneration success of Qualea grandiflora Mart. (Vochysiaceae) in neotropical savanna (cerrado) biomes by reviewing the available information and identifying research gaps

Ponte¹,

Huth²,

Wagner³

2020

iForest

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Qualea grandiflora Mart. (Vochysiaceae) is one of the most widespread species within the cerrado formation, which counts amongst the most threatened ecosystems worldwide. Understanding the regeneration ecology of Q. grandiflora is a central requirement for the success of conservation measures and silvicultural management strategies. Exhaustive investigation was carried out into each of the development stages, and the connected processes within the regeneration cycle, to provide a better understanding of the main factors influencing the regeneration ecology and the recruitment dynamics of the species. For this purpose, we analysed 92 different sources of information in this review, divided into two groups (n = 41 with "basic species information" and n = 51 with "specific information about regeneration stages and processes") relevant for regeneration and silviculture. Our literature review showed the high proportion of studies addressing the processes flowering, pollination and fruiting, whereas the subsequent processes like seed dispersal, seed storage, germination and seedling development are almost entirely lacking. This also applies for spatial information about environmental conditions and the related regeneration processes in Q. grandiflora. This knowledge is important for management, for example, knowledge of the critical distances between flowering and seed producing trees to ensure genetically diverse regeneration and the identification of safe sites for seedling establishment. Most of the practical suggestions in relation to increasing densities or growth of Q. grandiflora seedlings and saplings made in the literature are linked to less intensive fire management strategies adopted at certain times. The use of selective herbivory to reduce the increasing competition pressure exerted by invasive grasses and hampering Q. grandiflora seedlings is also cited. In this study we highlight the need for more complex species-specific information following the development stages and processes of the regeneration cycle so as to prepare a continuous strategy with a range of management approaches.

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<i>Qualea grandiflora</i> Mart.: temperatura na germinabilidade de sementes

Cited by 3 publications

References 2 publications

Metodologia padronizada para o teste de germinação em sementes de grão-de-bico (Cicer arietinum L.)

Metodologia padronizada para o teste de germinação em sementes de grão-de-bico (Cicer arietinum L.)

A comparative study of the thermal ranges of three germination criteria of a tropical tree with bioeconomic interest: Carapa surinamensis Miq. (Meliaceae)

Ensuring future regeneration success of Qualea grandiflora Mart. (Vochysiaceae) in neotropical savanna (cerrado) biomes by reviewing the available information and identifying research gaps

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