Physiological responses and quality attributes of Japanese pear ‘Kosui’ fruit kept in low oxygen atmospheres

Imahori, Yoshihiro; Kishioka, I.; Uemura, K.; Yoshioka, Hayato; Ueda, Yoshihiko; Ishimaru, Megumi; Chachin, Kazuo

doi:10.1080/14620316.2002.11511556

Cited by 11 publications

(7 citation statements)

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“…2). PDC and ADH activities of sweetpotato roots were higher than those of the bell pepper (Imahori et al, 2002a), Japanese pear (Imahori et al, 2002b), and tomato fruits (Imahori et al, 2003). In plant systems capable of anaerobic metabolism, all the enzymes involved in ethanol fermentation showed an increase in specific activity upon anaerobic treatment.…”

Section: Resultsmentioning

confidence: 91%

“…The SSC of sweetpotato roots kept in air remained constant, but increased in roots kept in 0% O 2 after 7 days (Table 1). It has been reported that short-term exposure to low O 2 atmospheres generally has little effect on SSC (Imahori et al, 2002b;Ke et al, 1994). However, Chang and Kays (1981) reported that sweetpotato roots stored at low O 2 concentrations below 5% accumulated more total sugars than roots stored at higher O 2 concentrations.…”

Section: Resultsmentioning

confidence: 98%

“…1 and 2). Discrepancies between ethanol accumulation and the apparent activity of either PDC or ADH have been reported in the bell pepper (Imahori et al, 2002a) and Japanese pear fruits (Imahori et al, 2002b). Roberts et al (1989) reported that ethanol production rates in hypoxic maize root tips were correlated with ADH activity when the enzyme level was very low, but at high levels of ADH activity, ethanol production was independent of this activity.…”

Section: Resultsmentioning

confidence: 99%

“…A number of flood-tolerant plants contained much larger quantities of ADH than some flood-intolerant species (Davies, 1980). The fermentation activity of sweetpotato roots was higher than those of the bell pepper (Imahori et al, 2002a), Japanese pear (Imahori et al, 2002b), and tomato fruits (Imahori et al, 2003). Thus, the changes in cellular pH are considered to be the controlling factor that regulates fermentative metabolism.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Short-term Exposure to Low Oxygen Atmospheres on Phsyiological Responses of Sweetpotato Roots

Imahori¹,

Kishioka²,

Uemura³

et al. 2007

J. Japan. Soc. Hort. Sci.

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Sweetpotato roots were stored under a continuous flow of 0% or 1% O 2 (balance N 2 ) or air for 7 days at 20°C to study the effects of short-term exposure to low O 2 on their physiological responses and quality. During the course of the experiment, no visible signs of injury or decay were observed. However, low O 2 treatments increased the soluble solid content and weak off-odors were detected by olfactory evaluation in roots stored at 0% O 2 . The intensity of off-odors increased as the concentrations of acetaldehyde and ethanol increased in roots during storage. Ethanol concentrations were higher than those of acetaldehyde, which remained low during storage in 1% O 2 and air, but increased greatly in roots stored at 0% O 2 . Pyruvate decarboxylase (PDC) activities in roots exposed to 0% or 1% O 2 increased by 3.1-and 2-fold respectively over levels in roots stored in air by day 7. Alcohol dehydrogenase (ADH) activities in roots exposed to 0% or 1% O 2 increased by 1.6-and 1.7-fold respectively over levels in roots stored in air by day 7. ADH-specific activity was about 10-times that of PDC. The pH of root homogenate exposed to air remained constant, whereas the pH increased and decreased, respectively, in roots stored at 0% or 1% O 2 . PDC showed stability over the pH range 5.5-7.0, whereas ADH exhibited stability over the pH range 6.0-7.5. The Km of PDC in sweetpotato was 0.56 mM for pyruvate, whereas the Km of ADH was 0.19 mM for acetaldehyde. From these results, there may be some potential for the short-term exposure of sweetpotato roots to low O 2 in place of low temperature treatment to prolong shelf-life, although ethanol fermentation may be accelerated under low O 2 atmospheres.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Short-term Exposure to Low Oxygen Atmospheres on Phsyiological Responses of Sweetpotato Roots

Imahori¹,

Kishioka²,

Uemura³

et al. 2007

J. Japan. Soc. Hort. Sci.

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“…ADH gene also regulated the synthesis of fruit aroma components through the fatty acid derivatives metabolic pathway (Dudareva et al, 2008). Especially, it would affect fruit aromatic components and flavor of fruit a lot that the content of ADH had a significant change during fruit maturation and ripening period (Imahon et al, 2002; Li et al, 2011). To explore the expression pattern of gene in the aroma synthesis pathway will be an effective method, because the difference of floral composition is significant among plants and the fragrance biosynthetic pathway is unclear.…”

Section: Discussionmentioning

confidence: 99%

Gene Cloning and Gene Expression Characteristics of Alcohol Dehydrogenase in Osmanthus fragrans var. semperflorens

Zhang

2018

Emir J Food Agric

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Because of a lot of aroma components in the flowers, Osmanthus fragrans is widely used as ornamental tree species and its flowers is used as materials of spices and food additives. Alcohol dehydrogenase (ADH) plays an important regulation role in growth, development, stress resistance and aroma synthesis of plants. Using the flowers of O fragrans var. semperflorens as materials, the full-length cDNA of ADH gene (termed OfADH) was successfully cloned through rapid amplification of cDNA ends (RACE), which has the 1128 bp open reading frame (ORF) in length and codes 375 amino acids. The results of conserved domain analysis show that the OfADH belongs to the zinc-dependent medium-chain dehydrogenase /reductase (MDR) superfamily, contains 22 NAD(P) binding sites in the liver_alcohol_DH_like conserved domains, and also has the PLN02740 (Alcohol dehydrogenase-like) domain. The results of semi-quantitative RT-PCR indicate that the expression level of OfADH in O. fragrans flowers is consistent with the rule of aroma formation and release, while the expression of OfADH in leaves is positively correlated with high temperature stress, suggesting that OfADH has obvious functional diversity in regulation of aroma synthesis and response to high temperature stress.

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Postharvest Stress Treatments in Fruits and Vegetables

Imahori

2011

Abiotic Stress Responses in Plants

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Physiological responses and quality attributes of Japanese pear ‘Kosui’ fruit kept in low oxygen atmospheres

Cited by 11 publications

References 0 publications

Effects of Short-term Exposure to Low Oxygen Atmospheres on Phsyiological Responses of Sweetpotato Roots

Effects of Short-term Exposure to Low Oxygen Atmospheres on Phsyiological Responses of Sweetpotato Roots

Gene Cloning and Gene Expression Characteristics of Alcohol Dehydrogenase in Osmanthus fragrans var. semperflorens

Postharvest Stress Treatments in Fruits and Vegetables

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