Qualidade fisiológica de sementes de citros durante o armazenamento em ambiente refrigerado

Struiving, Tiago Barbosa; Machado, Daniel Lucas Magalhães; Santos, Dierlei dos; Siqueira, Dalmo de Departamento de Fitotecnia Lopes; Lucena, Cícero Cartaxo de; Matarazzo, Pedro Henrique Monteiro

doi:10.1590/s0103-84782013001000008

Cited by 7 publications

(6 citation statements)

References 5 publications

(4 reference statements)

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“…Struiving et al (2013).These authors reported values of 125.0 g of 1000 seeds of citrandarin 1710 (C. reticulata -Changsha x P. trifoliata -English Small), a value similar to those obtained for citrandarins TSxPT 222, 254, 281 and 282. All rootstocks in this study had final emergence rate (FER) above 84%, with no statistical differences between them, with citrandarins TSxPT 123, 254 and 282, together with Rangpur lime and Swingle citrumelo, reaching 100 % FER (Table 3).…”

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confidence: 63%

Agronomic characterization of citrandarin fruits and seeds

2020

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In citrus cultivation, rootstocks are of fundamental importance and affect several characteristics of the variety used as canopy. Despite the great diversity within Citrus and related genera, the production of rootstocks in Brazil is restricted to a small number of varieties, making the citrus culture vulnerable to the appearance of phytosanitary problems. The aim of this study was to agronomically characterize fruits and seeds of seven citrandarins [Citrus sunki (Hayata) hort. ex Tanaka x Poncirus trifoliata cv. Rubidoux (L.) Raf.], obtained by controlled crossing. The orchard was installed in randomized blocks, with three replicates, in the municipality of Cordeirópolis, SP, where 20 fruits were collected in each replicate, obtained from free pollination of seven citrandarins, Swingle citrumelo and Rangpur lime. The following variables were evaluated: fruit mass, height, diameter, total number of seeds and percentage of viable seeds per fruit; number of embryos per seed, mass of one thousand seeds, number of seeds in 1.0 kg, final emergence rate, number of seedlings per seed, polyembryony rate, emergence speed index and seedling height at 60 days after sowing. For fruit size, the highest values were obtained for Swingle citrumelo. For number of embryos per seed, seedlings obtained through seed and polyembryony, citrandarin TSxPT 245 showed the highest values. Although citrandarin fruits had smaller size than fruits from commercial Rangpur lime and Swingle citrumelo rootstocks, characteristics related to seeds such as viability, polyembryony and emergence rate, were similar or superior, and can be considered potential new rootstocks for the production of citrus plants.

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confidence: 63%

Agronomic characterization of citrandarin fruits and seeds

2020

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“…The emergence of seeds extracted from fruits harvested at 180 DAA increased during cold storage (Figure 4 C). Struiving et al (2013) also observed loss of vigor of 'Limeira' trifoliate orange seeds, after storing seeds already extracted from fruits of this rootstock, in this case attributed to the reduction of seed water content.…”

Section: Physiological Quality Of Seedsmentioning

confidence: 67%

Ideal harvesting point of ‘Limeira-IAC382’ trifoliate orange fruits for seed extraction

et al. 2020

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Trifoliate orange is one of the rootstocks most used worldwide mainly because it provides excellent quality fruit production. Harvest at the correct time is among factors that determine the physiological quality of seeds. The aim of this study was to identify physicochemical changes in ‘Limeira-IAC382’ trifoliate orange fruits, searching for the ideal harvest moment to obtain high quality seeds. Fruits were harvested at 180, 210 and 240 days after anthesis, stored in cold chamber and evaluated at 0, 15, 30 and 45 days of storage. The following variables were determined: mass loss, fruit color index, soluble solids, total titratable acidity and fruit juice ratio. Seeds were manually extracted and dried until reaching 30% water content. Seeds were used for the performance of germination, electrical conductivity and greenhouse seedling emergence tests. Seeds from fruits harvested at 240 DAA showed higher germination and greenhouse seedling emergence percentage compared to the other treatments until 30 and 45 days of storage in cold chamber, respectively. Storage for 45 days in cold chamber of fruits harvested at 210 DAA increases seed germination rate and the percentage of seedlings from seeds harvested at 180 DAA. It could be concluded that the harvesting of ‘Limeira-IAC382’ trifoliate orange fruits should be performed when fruits reached yellowish peel and low juice ratio, aiming at obtaining seeds with physiological quality.

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“…Cold storage of fruits may have broken seed dormancy. According to Struivingi et al (2013), some varieties of citrus rootstocks have some kind of dormancy, presenting problems of germination uniformity. Dormancy may be caused by seed coat, acting as a physical barrier to water imbibition and gas diffusion, or by the presence of an embryo development inhibitor in the seed coat.…”

Section: Seed Germination and Emergencementioning

confidence: 99%

Maturation and physiological quality of IAC-863 Rangpur lime seeds

et al. 2019

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There is a growing demand for high quality seeds to obtain citrus rootstocks. Normative Instruction 48 (MAPA) of September 24, 2013, requires minimum of 50% germination for the marketing of citrus seeds. Harvest season is one of the stages of seed production with great importance to ensure quality, which makes knowing its maturation process an important step. Thus, the objective of this study was to monitor physicochemical changes in IAC-863 Rangpur lime fruits in order to characterize the physiological maturity of seeds, and to define the ideal harvest point in order to obtain seeds with high physiological quality to obtain rootstocks. Physicochemical analysis of fruits (mass loss, color, soluble solids and acidity) and analysis of seeds (water content, germination and emergence) was performed. Higher germination results were observed in seeds obtained from fruits with higher color index and soluble solids content. The storage of IAC-863 Rangpur lime fruits after harvest increases germination rate, especially in mid-season fruits.

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Qualidade fisiológica de sementes de citros durante o armazenamento em ambiente refrigerado

Cited by 7 publications

References 5 publications

Agronomic characterization of citrandarin fruits and seeds

Agronomic characterization of citrandarin fruits and seeds

Ideal harvesting point of ‘Limeira-IAC382’ trifoliate orange fruits for seed extraction

Maturation and physiological quality of IAC-863 Rangpur lime seeds

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