2011
DOI: 10.1590/s0103-90162011000400011
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Abstract: The flower bud abortion is one of the main problems that limit commercial pear (Pyrus pyrifolia) production in the southern region of Brazil. Insufficient chilling during the dormancy period is known as the main factor of this problem. One of the hypotheses to explain this problem is that the starch mobilization and carbohydrate fluxes to the buds are impeded when mild temperatures occurred during winter. This study compared the total soluble sugars (TSS) and reducing sugars (RS) concentrations, the cell wall … Show more

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Cited by 39 publications
(40 citation statements)
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“…In such artificial conditions of 80% of chilling fulfillment, a prolonged flowering period, with low number of opened flowers was observed, regarding of necrosis incidence in floral primordia. It was possible to reproduce, in this experiment, similar phenology observed in a warm winter conditions of Southern Brazil and described by several authors as "flower bud abortion" (Marafon et al, 2011;Petri & Herter, 2002;Petri et al, 2001;Trevisan et al, 2005;Veríssimo et al, 2002).…”
Section: Discussionsupporting
confidence: 75%
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“…In such artificial conditions of 80% of chilling fulfillment, a prolonged flowering period, with low number of opened flowers was observed, regarding of necrosis incidence in floral primordia. It was possible to reproduce, in this experiment, similar phenology observed in a warm winter conditions of Southern Brazil and described by several authors as "flower bud abortion" (Marafon et al, 2011;Petri & Herter, 2002;Petri et al, 2001;Trevisan et al, 2005;Veríssimo et al, 2002).…”
Section: Discussionsupporting
confidence: 75%
“…Rakngan et al (1996) observed that the Japanese pear trees under enough chilling released from dormancy earlier than plants with insufficient chilling accumulation. The occurrence of intermittent warm days during dormancy period, with temperatures higher than 27 C, delayed the dormancy release more than mild temperature fluctuations (2-3 C) (Marafon et al, 2011). …”
Section: Global Warming and Dormancymentioning
confidence: 99%
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“…Embora o teor de açúcares solúveis tenha aumentado em ramos da Seleção 19, durante o período em que se procedeu às coletas, até a segunda época de coleta de ramos, esse aumento não foi acompanhado pela redução no teor de amido, contrariando os resultados obtidos por Bonhomme et al (2005) em pessegueiro e por Marafon et al (2011) em pereira, os quais observaram um estreito paralelismo entre a hidrólise do amido e o aumento no teor de açúcares solúveis totais nos ramos, durante o inverno.…”
Section: Resultsunclassified