Changes in the Antioxidant System Associated with Budbreak in `Anna' Apple (Malus domestica Borkh.) Buds

Wang, Shiow Y.; Faust, Miklos

doi:10.21273/jashs.119.4.735

Cited by 40 publications

(12 citation statements)

References 35 publications

(41 reference statements)

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“…The specific activity of DHAR was induced by all three of the stresses used in this study indicating that this enzyme might play an important role in the defense mechanism of crofton weed. Other studies also have reported that DHAR activity increased in response to different types of stresses, such as high temperature (Wang and Faust 1994), high light intensity (Slooten et al 1995), and water deficiency (Zhang and Kirkham 1996). DHAR is thought to play an important role in the oxidative stress tolerance of plants by regenerating ascorbate from dehydroascorbate (Foyer and Mullineaux 1998).…”

Section: Resultsmentioning

confidence: 94%

Activity of Stress‐related Antioxidative Enzymes in the Invasive Plant Crofton Weed (Eupatorium adenophorum)

Sang

2007

JIPB

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Crofton weed is an invasive weed in southwestern China. The activities of several antioxidative enzymes involved in plant protection against oxidative stress were assayed to determine physiological aspects of the crofton weed that might render the plant vulnerable to environmental stress. Stresses imposed on crofton weed were heat (progressively increasing temperatures: 25 °C, 30 °C, 35 °C, 38 °C and 42 °C at 24 h intervals), cold (progressively decreasing temperatures: 25 °C, 20 °C, 15 °C, 10 °C and 5 °C at 24 h intervals), and drought (without watering up to 4 days). The three stresses induced oxidative damage as evidenced by an increase in lipid peroxidation. The effect varied with the stress imposed and the length of exposure. The activity of superoxide dismutase (SOD) increased in response to all stresses but was not significantly different from the controls (P < 0.05) when exposed to cold stress. Catalase (CAT) activity decreased in response to heat and drought stress but increased when exposed to cold conditions. Guaiacol peroxidase (POD) and glutathione reductase (GR) activities increased in response to cold and drought but decreased in response to heat stress. The activity of ascorbate peroxidase (APX) responded differently to all three stresses. Monodehydroascorbate reductase (MDHAR) activity decreased in response to heat and drought, and slightly increased in response to the cold stress but was not significantly different from the controls (P < 0.05). The activity of dehydroascorbate reductase (DHAR) increased in response to all three stresses. Taken together, the co‐ordinate increase of the oxygen‐detoxifying enzymes might be more effective to protect crofton weed from the accumulation of oxygen radicals at low temperatures rather than at high temperatures.

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Section: Resultsmentioning

confidence: 94%

Activity of Stress‐related Antioxidative Enzymes in the Invasive Plant Crofton Weed (Eupatorium adenophorum)

Sang

2007

JIPB

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“…Taken together, these observations indicate a general role for hightemperature stress in lateral bud burst and loss of AD. Exposure of stems to extreme temperatures has been shown previously to induce early bud burst in tree species such as apple (Malus domestica; Wang and Faust, 1994), red-osier dogwood (Cornus sericea; Shirazi and Fuchigami, 1995), poplar (Populus nigra; Wisniewski et al, 1997), and nectarine (Prunus persica; Yue et al, 2013). Induction of primary and secondary branching upon prolonged exposure to high temperature (32°C) also has been observed in Arabidopsis (Arabidopsis thaliana; Antoun and Ouellet, 2013).…”

Section: Parenchyma Is the Source Of The Branching Signalmentioning

confidence: 98%

Etiolated Stem Branching Is a Result of Systemic Signaling Associated with Sucrose Level

et al. 2017

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The potato () tuber is a swollen stem. Sprouts growing from the tuber nodes represent loss of apical dominance and branching. Long cold storage induces loss of tuber apical dominance and results in secondary branching. Here, we show that a similar branching pattern can be induced by short heat treatment of the tubers. Detached sprouts were induced to branch by the heat treatment only when attached to a parenchyma cylinder. Grafting experiments showed that the scion branches only when grafted onto heat- or cold-treated tuber parenchyma, suggesting that the branching signal is transmitted systemically from the bud-base parenchyma to the grafted stem. Exogenous supply of sucrose (Suc), glucose, or fructose solution to detached sprouts induced branching in a dose-responsive manner, and an increase in Suc level was observed in tuber parenchyma upon branching induction, suggesting a role for elevated parenchyma sugars in the regulation of branching. However, sugar analysis of the apex and node after grafting showed no distinct differences in sugar levels between branching and nonbranching stems. Vacuolar invertase is a key enzyme in determining the level of Suc and its cleavage products, glucose and fructose, in potato parenchyma. Silencing of the vacuolar invertase-encoding gene led to increased tuber branching in combination with branching-inducing treatments. These results suggest that Suc in the parenchyma induces branching through signaling and not by excess mobilization from the parenchyma to the stem.

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“…A role of phenolic compounds in the hardiness of plants has been shown: under lower temperatures phenolic compound concentrations in plant tissues increases (Óïàäûøåâ, 2008). Significant increase of ascorbic acid content in apple tissues promotes a drop in intensity of free radical processes in cell membranes and improves their resistance (Wang and Faust, 1994;Ãóäêîâñêèé è äð., 2005;Õàóñòîâè÷ è Ïîòàïîâ, 2007;Íåíüêî è äð., 2008).…”

Section: Introductionmentioning

confidence: 99%

Apple-Tree Resistance to Abiotic Factors in Winter

Красова¹,

Галашева²,

Golishkina³

2013

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences

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Data on the reaction of apple cultivars to unfavorable autumn-winter conditions were analysed and summarised. New scab resistant apple cultivars (gene Vf) obtained from the hybridisation of local adapted varieties with a donor of scab immunity also displayed hardiness to unfavourable winter conditions. As a result of artificial freezing, the cultivars resistant to spring frost (-3.5 oC) during flowering were identified. The mechanism of adaptation to unfavourable winter conditions, and the possibility of preliminary prediction of winter hardiness according to some indicators of the physiological state of tissues in wintering trees were found. In all apple cultivars, increase of the concentrations of sucrose, anthocyanin and cyanidin was noted during the autumn-winter period, but in winter-hardy cultivars this process was more intensive; the amount of cyanidin in the bark of shoots was 6-8 times higher in comparison with non-winter-hardy cultivars. Higher water loss in non-winter-hardy cultivars was observed under conditions of extreme temperatures, which can lead to significant freezing and sunburns late in winter. In winter-hardy cultivars, peroxidase activity decreased in winter, while in the non-winter-hardy cultivars it remains high, due to incomplete hardening of tissues.

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Changes in the Antioxidant System Associated with Budbreak in `Anna' Apple (Malus domestica Borkh.) Buds

Cited by 40 publications

References 35 publications

Activity of Stress‐related Antioxidative Enzymes in the Invasive Plant Crofton Weed (Eupatorium adenophorum)

Activity of Stress‐related Antioxidative Enzymes in the Invasive Plant Crofton Weed (Eupatorium adenophorum)

Etiolated Stem Branching Is a Result of Systemic Signaling Associated with Sucrose Level

Apple-Tree Resistance to Abiotic Factors in Winter

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