Sugar metabolism in buds during flower bud formation: a comparison of two Japanese pear [Pyrus pyrifolia (Burm.) Nak.] cultivars possessing different flowering habits

Ito, Akiko; Hayama, Hiroko; Kashimura, Y.

doi:10.1016/s0304-4238(02)00122-x

Cited by 47 publications

(39 citation statements)

References 16 publications

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“…AIV activity decreased rapidly with fruit maturation in the fruit of both sugar accumulation types. Ito et al (2002) examined changes in SuSy and AIV activities related to NAD-SDH and NADP-dependent sorbitol dehydrogenase (NADP-SDH) activities in the buds of Japanese pear tree and indicated that AIV activity with NAD-SDH activity increased markedly with bud growth. SuSy and AIV activities with NAD-SDH activity were also investigated in endocarps, mesocarps, and the seeds of peach fruit during fruit development (Lo Bianco and Rieger, 2002).…”

Section: Metabolic Conversion Of Translocation Sugars In Fruitmentioning

confidence: 99%

“…The fluctuation pattern of pear fruit corresponded to that of the mRNA level, that is, it was controlled by transcriptional regulation . Ito et al (2002) examined activities of NAD-SDH and NADP-SDH on bud growth; NAD-SDH activity clearly increased, but NADP-SDH activity did not change. Both activities of NAD-SDH and NADP-SDH increased slightly to stimulate sorbitol metabolism by shading buds (Ito et al, 2003).…”

Section: Metabolic Conversion Of Translocation Sugars In Fruitmentioning

confidence: 99%

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Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

Yamaki

2010

J. Japan. Soc. Hort. Sci.

101

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Photoassimilates needed for fruit development are supplied from leaves, converted in fruit to substances relating to the specific quality of the fruit, then accumulate in the fruit. There are various regulation steps in the process from photoassimilate synthesis in leaves to sugar accumulation in fruit: photosynthesis, synthesis of translocation sugars, loading of translocation sugars, their translocation, their unloading, their membrane transport, their metabolic conversion, and compartmentation in vacuoles. Thus, it is important to clarify the mechanism and regulation of each step in fruit development. In this review, mainly the metabolic conversion of translocation sugars and their regulation at the genetic level in fruit are described because the metabolic conversion in fruit contributes greatly to produce the sink activity needed for fruit development.

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Section: Metabolic Conversion Of Translocation Sugars In Fruitmentioning

confidence: 99%

Section: Metabolic Conversion Of Translocation Sugars In Fruitmentioning

confidence: 99%

Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

Yamaki

2010

J. Japan. Soc. Hort. Sci.

101

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“…The procedures were conducted on ice. Enzyme extraction was conducted according to Ito et al (2002) with slight modifications. A sample of 1 g of frozen fruit tissue was mixed with 1 g insoluble polyvinylpyrrolidone (polyclar AT; SERVA Electrophoresis GmbH, Heidelberg, Germany) and ground in a cooled mortar and pestle in 10 ml 0.2 M K-phosphate buffer (pH 7.0) containing 10 mM ascorbic acid, 20 mM 2-mercaptethanol and 0.1% Triton X-100.…”

Section: Enzyme Extractsmentioning

confidence: 99%

“…SAI and CWAI activity were assayed at 30°C by the method described by Ito et al (2002) with some modifications. The reaction mixture consisted of 0.5 ml 120 mM sodium acetate buffer (pH 5.0), 0.25 ml 280 mM sucrose and 0.25 ml enzyme extract.…”

Section: Assays Of Enzyme Activitiesmentioning

confidence: 99%

Effects of Salinity on Distribution of Photosynthates and Carbohydrate Metabolism in Tomato Grown using Nutrient Film Technique

Saito

Fukuda

Matsukura

et al. 2009

J. Japan. Soc. Hort. Sci.

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Tomato plants were grown using a nutrient film technique to evaluate the effects of salinity on the distribution of photosynthates and sucrose-degrading enzymes in fruit in relation to sink strength. From first flower anthesis until harvest of the 2nd truss, saline treatment of sodium chloride added to the standard nutrient solution to an EC of 8.0 dS/m was applied. The average fruit weight in the salinity treatment was 59% of the control at the mature red stage. Total soluble solids (Brix%) were 6.5% in the control and 9.2% in the salinity treatment. The photosynthetic rate per unit leaf area was decreased by salinity treatment. Salinity decreased 13 C assimilation in the whole tomato plant, while it increased the transport and distribution of 13 C assimilates to the fruit significantly. The activities of soluble and cell wall-bound acid invertase were not affected by salinity; however, the activity of sucrose synthase in fruit exposed to the salinity was higher than that in the control during fruit development. We concluded that the increase in total soluble solids in fruit subjected to salinity was not only a result of condensation caused by reduced water uptake, but active transport of photosynthates to the fruit due to increase in sucrosedegrading enzyme activities, especially sucrose synthase.

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“…These processes are controlled by various internal and external factors, such as flowering pathway genes (Hanke et al 2007), sugar metabolism (Ito et al 2002), SQUAMOSA Promoter-Binding Protein-Like (SPL)-family genes and microRNAs (Chen et al 2010;Poethig 2010;Wang et al 2011), phytohormones (Banno et al 1985;Buban and Faust 1982;Looney et al 1985) and environmental conditions, such as CO 2 concentration, temperature, daylength and nutrition (Sachs and Hackett 1983;Stahly and Piringer 1962;Zimmerman 1971). Here, we clarified one part of these complex processes in apple; that is, the relationships among vegetative growth, phytohormones, and expression of MdTFL1.…”

mentioning

confidence: 99%

Effects of the plant growth regulators on expression of MdTFL1 promoter fused β-glucuronidase (GUS) reporter gene in apple (Malus spp.) tissues in vitro

Mimida

Oshino

et al. 2011

Plant Biotechnology

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Sugar metabolism in buds during flower bud formation: a comparison of two Japanese pear [Pyrus pyrifolia (Burm.) Nak.] cultivars possessing different flowering habits

Cited by 47 publications

References 16 publications

Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

Effects of Salinity on Distribution of Photosynthates and Carbohydrate Metabolism in Tomato Grown using Nutrient Film Technique

Effects of the plant growth regulators on expression of MdTFL1 promoter fused β-glucuronidase (GUS) reporter gene in apple (Malus spp.) tissues in vitro

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