2006
DOI: 10.1590/s0100-29452006000100003
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Abstract: As pereiras européias e asiáticas, cultivadas sob condições de inverno ameno, como na região Sul do Brasil, apresentam problemas de adaptação. Durante o inverno, as oscilações térmicas e o baixo acúmulo de frio têm sido referidos por alguns autores como causas do abortamento de gemas florais. O objetivo deste trabalho foi determinar o balanço de carboidratos em tecidos de gemas florais de duas cultivares de pereiras: Kieffer (P. communis x P. pyrifolia) e Housui (P. pyrifolia). Os tecidos de gemas florais e da… Show more

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Cited by 6 publications
(7 citation statements)
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“…The less intense winter of 2007 could have induced this secondary dormancy, which finished completely after the experimental treatment of 1,440 additional CH (Table 4). In 2008, the greater accumulation of CU (Table 2) reduced the ABT to a level similar to the one obtained after the treatment with additional cold During the phase that precedes bud budburst in Hosui pear trees, high levels of sorbitol and sucrose are found at the base of the bud (RODRIGUES et al, 2006). Starch levels also vary and can be used as an indicator of the phase that precedes budburst, i.e., the end of dormancy.…”
Section: Resultsmentioning
confidence: 58%
“…The less intense winter of 2007 could have induced this secondary dormancy, which finished completely after the experimental treatment of 1,440 additional CH (Table 4). In 2008, the greater accumulation of CU (Table 2) reduced the ABT to a level similar to the one obtained after the treatment with additional cold During the phase that precedes bud budburst in Hosui pear trees, high levels of sorbitol and sucrose are found at the base of the bud (RODRIGUES et al, 2006). Starch levels also vary and can be used as an indicator of the phase that precedes budburst, i.e., the end of dormancy.…”
Section: Resultsmentioning
confidence: 58%
“…As gemas secundárias e terciárias tornam-se ativas apenas no caso da morte das gemas primárias e secundárias (BOTELHO et al, 2006). As gemas primárias são mais desenvolvidas e normalmente possuem vários primórdios foliares, inflorescências e gemas laterais, antes de se tornarem dormentes no final do ciclo (SMART et al, 2003). As gemas secundárias eventualmente são férteis, mas as terciárias normalmente não são férteis.…”
Section: Resultsunclassified
“…As gemas secundárias eventualmente são férteis, mas as terciárias normalmente não são férteis. O grau de diferenciação floral, antes do início da dormência, depende das características genéticas das variedades, do vigor do porta-enxerto, da localização da gema, bem como do ambiente circundante durante a formação das gemas (SMART et al, 2003).…”
Section: Resultsunclassified
“…Rodrigues et al [28], studying the changes in starch and soluble sugars in two pear cultivars gems from February to September, found higher levels of total soluble sugars in September. The authors explain that the elevated total sugars levels occurred during this period due to starch degradation process of soluble carbohydrates (sorbitol, sucrose, glucose and fructose) which have been translocated from bud basis for developing floral structure.…”
Section: Accumulation and Levels Of Total Carbohydratesmentioning
confidence: 97%
“…Temperature is one of the climatic elements which is directly connected with the carbohydrates mobilization present in woody plant organs [27]. Rodrigues [28] elucidate that the temperature is an important factor on adaptation of temperate climate fruits plants. Larcher [7] also reports that the intensity of mobilization of carbohydrates influences the branch growth, flowering and fruit production.…”
Section: Accumulation and Levels Of Total Carbohydratesmentioning
confidence: 99%