A escarificação química e o desenvolvimento inicial de porta-enxertos cítricos

Teixeira, Paulo de Tarso Lima; Schäfer, Gilmar; Souza, Paulo Vítor Dutra de; Todeschini, Abel

doi:10.1590/s0100-29452009000300033

Cited by 9 publications

(6 citation statements)

References 6 publications

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“…The citrumelo 'Swingle' usually has low values of seedling emergence. It was observed by several studies, such as the ones conducted by Teixeira et al (2009), Rodrigues et al (2015) and Sarmiento et al (2016), who found 51%, 79% and 65%, it means that more seeds need to be sown per tube, with the purpose of avoiding losses in the next stages of seedling production, due to the low emergence percentage of the rootstock seeds. MXWL-mandarin orange tree 'Willow Leaf' (C. deliciosa Tenore); LHA-orange tree 'Hamlin' (C. sinensis); CLEO-tangerine tree 'Cleópatra' (C. reshni hort.…”

Section: Resultsmentioning

confidence: 91%

Emergence Percentage and Speed of Rootstocks for Citriculture in South of Brazil

Marques¹,

Mello-Farias²,

Oliveira³

et al. 2019

JAS

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The fact that Brazilian citriculture has focused on few rootstocks poses several phytosanitary risks to the culture and has made genetic improvement programs develop hybrid genotypes to be used as novel alternatives. This study aimed at evaluating the behavior of 42 different rootstocks regarding their emergence percentage and speed in weather conditions experienced in the extreme south of Brazil. Seeds of hybrids developed by the Citrus Genetic Improvement Program (PMG Citros) at the Embrapa Mandioca e Fruticultura (PMG Citros) and cultivars from other citrus growing regions were sown in conical tubes filled with commercial substrate in May 2017. A thoroughly randomized design with 4 replicates, each composed of 45 sampling units, was employed. Emergence percentage and emergence speed of every genotype were evaluated and the ones with the highest emergence percentage of seedlings and the ones with the most precocious emergence were identified. All genotypes completed seedling emergence 98 days after sowing. Seeds of Trifoliata, TSKC × CTSW-041 and TSKC × CTSW-025 had the highest values of seedling emergence whereas the highest emergence speed indexes were exhibited by genotypes Trifoliata and lemon tree ‘Cravo’.

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Section: Resultsmentioning

confidence: 91%

Emergence Percentage and Speed of Rootstocks for Citriculture in South of Brazil

Marques¹,

Mello-Farias²,

Oliveira³

et al. 2019

JAS

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“…Também Rodriguez et al (1982) observaram, em sementes de goiaba, que a aplicação de HCl em curtos períodos de imersão (três, seis e nove minutos) favoreceu a porcentagem, velocidade e uniformidade de emergência das plântulas. Teixeira et al (2009) constataram que a escarificação química aumentou a germinação das sementes e o desenvolvimento inicial dos porta-enxertos cítricos FEPAGRO 'C37' e 'Trifoliata'.…”

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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“…This classification was useful to detect the "umbrella effect" (i.e., water redirection by leaves) and reduce data variability over time. A period of 120 days was adopted as the growing period for the citrus rootstock liners based on ROZANE et al (2009) andTEIXEIRA et al (2009b). This growing period allow the plants to reach an appropriate shoot height and stem diameter for transplanting into larger containers for grafting.…”

Section: Characterization Of the Major Production Components Includinmentioning

confidence: 99%

Method to evaluate the efficiency of manual overhead irrigation in citrus rootstock liner production

et al. 2016

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Brazil produces grafted citrus seedlings in closed screen houses to reduce pest and disease incidence. Irrigation is usually performed by hand using either breaker nozzles or drilled polyvinyl chloride (PVC) pipe wands on garden hoses. Rootstocks are produced in cone-shaped containers filled with soilless potting mix. Since the containers have a small upper diameter, nutrient solution capture is reduced with the potential to cause environmental contamination from inefficient fertigation. This study provides a method to assess the efficiency of manual overhead irrigation systems used in liner production. The method consists of determining both the volume of water applied and volume lost (i.e., directly and by percolation) in order to obtain an estimate of the percentage of water loss, irrigation efficiency, and the drainage fraction. The method was tested in a commercial facility under standard production practices. The method's attributes included simplicity, quick sampling and data collection, and accuracy. The evaluated nursery was found to have low irrigation efficiency (27.14%) and excessive nutrient solution losses (72.86%). Considering an average production of 300,000 liners per year on 20,000 m 2 , we determined an annual solution loss of 221.8 m 3 with an average environmental release of 158.9 kg of fertilizer. Therefore, more efficient irrigation systems are necessary for sustainable citrus rootstock liners production.

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A escarificação química e o desenvolvimento inicial de porta-enxertos cítricos

Cited by 9 publications

References 6 publications

Emergence Percentage and Speed of Rootstocks for Citriculture in South of Brazil

Emergence Percentage and Speed of Rootstocks for Citriculture in South of Brazil

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

Method to evaluate the efficiency of manual overhead irrigation in citrus rootstock liner production

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