Seed germination and removal of Michelia champaca L. (Magnoliaceae) in eucalypt stands: the influence of the aril

Candiani, Giovano; Galetti, Mauro; Cardoso, Victor José Mendes

doi:10.1590/s0100-67622004000300002

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…The results in the current study agree with other reports for several other seed-mucilage-bearing species. For example, removing the seed mucilage reportedly favoured the percentage, speed, uniformity of germination, and early development in papaya (Carica papaya [19]), guava (Psidium guajava [20]), citrus [21], red dragon (Hylocereus undatus Haw [22]), passion fruit (Passiflora edulis [23][24][25]), alyssum (Alyssum minus [13]), and lettuce (Lactuca sativa [26]). …”

Section: Discussionmentioning

confidence: 99%

Demucilaging Freshly Stored Seeds of Cocoa (Theobroma cacao L.) Improves Seedling Emergence and Growth

et al. 2017

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Fresh seeds of cocoa (Theobroma cacao L.) are covered by a large amount of mucilage, which plays important ecological roles. However, for stored seeds, mucilage can adversely affect germination. This study investigated the effect of mucilage removal (demucilaging) and seed storage of freshly extracted cocoa seeds on seedling emergence and growth. The study showed that demucilaging cocoa seeds confers several advantages over mucilage intact seeds provided the seeds have been stored for at least three days before sowing. Demucilaging increased germination rate (T 50 ) and percentage germination and presence of mucilage increased days to seedling emergence and cessation of germination when seeds were stored for over two days. For up to 21 days of seed storage, there was generally no difference in many traits for demucilaged seeds. Demucilaged seeds had 80-100% germination after 21 days of storage, and rate of germination increased with increasing duration of seed storage. Intact mucilage seeds maintained 80-100% germination for only 2 days after seed extraction and rate of germination decreased with increasing seed storage duration. We conclude that (i) if seeds are sown on the day of extraction demucilaging before sowing would be superfluous and (ii) demucilaging and storage can provide advantages to smallholder farmers when environmental or socioeconomic conditions preclude immediate sowing.

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Section: Discussionmentioning

confidence: 99%

Demucilaging Freshly Stored Seeds of Cocoa (Theobroma cacao L.) Improves Seedling Emergence and Growth

et al. 2017

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“…No correlations were found between this variable and the rest of the values of germination and vigor evaluated. Candiani et al [57] concluded that the germination of Michelia champaca L. seeds is hindered probably due to the presence of inhibiting substances in the aril, is considered as endogenous causes of seed dormancy which include factors such as phytohormones, or by interference with water uptake [58]. Abscisic acid (ABA) is the key inhibitor of germination in Taxus yunnanensis seeds during wet sand storage [59].…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Effect of Scarification Process on Papaya (Carica papayaLin.) Seeds Germination

Rodrı́guez¹,

Vargas²,

Hijuelo³

et al. 2020

Seed Dormancy and Germination

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The presence of the aril (sarcotesta) in the papaya causes a slow and low germination, being necessary to break the state of dormancy. Calcium hydroxide that was applied in order to evaluate its scarifying effect was the objective. The sample consisted of 60 randomly selected fruits of hermaphrodite plants in a commercial production batch of approximately 1 ha (2222 plants) showing commercial maturity, of homogeneous size (±2 kg). The treatments were calcium hydroxide Ca(OH) 2 at three doses, dipping the seed for a period of 24 h; the standardized sodium hydroxide (NaOH) at 25% with a 15 min immersion time. The highest germination and vigor seeds were obtained applied Ca(OH) 2 with highly significant differences respect to the rest treatment, especially for the dose of 60 g l −1 of water for reasons of diminishing expenses. Significant correlations were found, with direct relations (aril and mechanical damage) and inverse relations (abnormal seeds) between the variables evaluated related to the vigor and germination of the seeds. It can be an ecological and not expensive methodology to improve the germination and vigor of papaya seeds in relation to other chemical compounds to scarify.

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“…Conforme relatos de São-José & Nakagawa (1987) a presença da mucilagem em sementes de maracujá contribuiu para reduzir a porcentagem de germinação. De forma semelhante, Candiani et al (2004) constataram que a presença da mucilagem inibiu a germinação de sementes de champaca e de alface. Ono et al (2004) também observaram problemas na germinação de sementes de mamão, pela presença de substâncias inibidoras na mucilagem.…”

Section: Resultsunclassified

Efeito da remoção da mucilagem na germinação e vigor de sementes de Hylocereus undatus Haw

Alves

Godoy

Oliveira

2012

Agraria

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RESUMOPitaia vermelha (Hylocereus undatus Haw.) é uma espécie frutífera tropical que vem sendo procurada devido à aparência atrativa ao consumidor, características organolépticas com sabor agradável, levemente adocicado, razão por que tem sido uma alternativa promissora para os produtores. O presente trabalho teve o objetivo de estudar o efeito de diferentes métodos de remoção da mucilagem na germinação e vigor de sementes de pitaia vermelha. As sementes foram retiradas de frutos maduros, através dos seguintes tratamentos: testemunha -sementes com mucilagem, extração manual da mucilagem em peneira de nylon (2 mm) em água corrente, extração manual em peneira de nylon + cal, embebição em solução de HCl 1:2 durante 1 hora e fermentação natural por cinco dias. Após a realização dos métodos de remoção as sementes foram distribuídas em caixas do tipo gerbox, sobre duas folhas de papel de filtro umedecido com água destilada, mantidas em câmara de germinação com temperatura constante de 25 ºC. As variáveis avaliadas foram germinação, considerando-se as plântulas normais, anormais e sementes dormentes e/ou mortas e o índice de velocidade de germinação. A remoção da mucilagem influencia a germinação e o vigor das sementes de pitaia vermelha, sendo indicada a imersão das sementes em solução de HCl durante uma hora. Palavras-chave: frutífera, pitaia vermelha, viabilidade Effect of removal of mucilage in germination and seed vigor of Hylocereus undatus Haw ABSTRACTRed pitaya (Hylocereus undatus Haw.) is a tropical fruit species that is being sought because of its attractive appearance to the consumers, with organoleptic flavor, slightly sweet, and thus has shown a promising alternative for producers. This work aimed to study the effect of different methods of removal of mucilage on germination and seed vigor of red pitaya. The seeds were removed from ripe fruits and subjected to the following treatments: controlseeds with mucilage, manual extraction of the mucilage in nylon mesh (2 mm) in running water, manual extraction in nylon mesh + lime, soaking in a solution of 1:2 HCl for 1 hour and natural fermentation for five days. After completion of the removal of mucilage, the seeds were distributed in gerbox on two sheets of filter paper moistened with distilled water, kept in a germination chamber at a constant temperature of 25 o C. The variables evaluated were the germination considering the seedlings as normal and abnormal, dormant seed and dead and index of velocity of germination. Removal of mucilage influenced the seed germination of pitaya red, indicated the immersion of seeds in a solution of HCl for 1 hour.

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Seed germination and removal of Michelia champaca L. (Magnoliaceae) in eucalypt stands: the influence of the aril

Cited by 13 publications

References 7 publications

Demucilaging Freshly Stored Seeds of Cocoa (Theobroma cacao L.) Improves Seedling Emergence and Growth

Demucilaging Freshly Stored Seeds of Cocoa (Theobroma cacao L.) Improves Seedling Emergence and Growth

Analysis of the Effect of Scarification Process on Papaya (Carica papayaLin.) Seeds Germination

Efeito da remoção da mucilagem na germinação e vigor de sementes de Hylocereus undatus Haw

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