Chilling Stress and Active-Oxygen Enzymes in Zea mays and Zea diploperennis

Jahnke, Leland S.; Hull, Mark R.; Long, Stephen P.

doi:10.1007/978-94-009-0511-5_783

Cited by 7 publications

(9 citation statements)

References 10 publications

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“…In both organs, stimulation of some detoxifying enzymes during the first 4 days of chilling might result from an induction of these enzymes through the production of O 2 À and H 2 O 2 (Prasad et al, 1994). Different studies demonstrated that chilling tolerance in various species was partly the result of an enhanced antioxidant defence system (Jahnke et al, 1991;Walker and McKersie, 1993;Hodges et al, 1996;Prasad, 1996, Yang et al, 2001. The evidence indicates that CI of cucumber leaves was caused mainly by increased lipid peroxidation measured by the increase in MDA formation in chilled leaves (Shen et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Posmyk

Bailly

Szafrańska

et al. 2005

Journal of Plant Physiology

145

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Section: Discussionmentioning

confidence: 99%

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Posmyk

Bailly

Szafrańska

et al. 2005

Journal of Plant Physiology

145

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“…Glutathione reductase activity was measured according to Jahnke et al (1991). The reaction mixture was composed of 80 mM potassium phosphate buffer (pH 7.8) containing 200 µM DTPA, 0.1 mM NADPH, 0.5 mM oxidized glutathione and 100 µl of plant extract in a total volume of 2 ml.…”

Section: Biochemical Measurementsmentioning

confidence: 99%

Effects of Tropospheric Ozone on Potato Plants Protected by the Antioxidant Diphenylamine (DPA)

Carrasco-Rodriguez

Asensi-Fabado

Valle-Tascón

2005

Water Air Soil Pollut

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To assess the protective effects of diphenylamine (DPA) on yield, DPA-and non-DPAtreated plants of potatoes (Solanum tuberosum cv. Agria) were exposed to ambient air at a rural site in Spain. Concentrations of ambient ozone were high at the site. Untreated plants served as controls. The DPA treatments did not have a significant effect on Chl content. The treatment with DPA (0.2 M) caused a significant increase of fresh weight production and tuber number of the potato plants in both years of study (32 and 47% in 2002 and 9 and 27% in 2003). Changes in the activity of antioxidant enzymes guaiacol peroxidase (GPX) and glutathione reductase (GR) in the leaves were determined in control and DPA-treated plants. The GPX activity in the leaves was significantly lower in the treated plants. GR was also lower, but not significantly, in the treated plants. The highest correlation between enzyme activity and yield was found in the case of GPX. The protective effect of DPA was related inversely to peroxidase activity. This is the first report demonstrating markedly enhanced yield and reduction of peroxides of potentially harmful O 3 by DPA as a mechanism for protecting plants against noxious oxidative stress from the environment.

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“…However, the increased production of reactive oxygen species resulting from photoreduction of oxygen that would occur in C 4 leaves at low temperatures is potentially extremely damaging to thylakoid membrane components (Asada 1999). Levels of enzymes that can scavenge reactive oxygen species increase in Zea species at chilling temperatures, and this could be an important response of the leaves to minimize damage to thylakoid membranes (Jahnke, Hull & Long 1991;Massacci et al . 1995;Hodges et al .…”

Section: Introductionmentioning

confidence: 99%

Low growth temperatures modify the efficiency of light use by photosystem II for CO₂ assimilation in leaves of two chilling‐tolerant C₄ species, Cyperus longus L. and Miscanthus × giganteus

Farage

Blowers

Long

et al. 2005

Plant Cell & Environment

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103

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Two C 4 plants, Miscanthus × × × × giganteus and Cyperus longus L., were grown at suboptimal growth temperatures and the relationships between the quantum efficiencies of photosynthetic electron transport through photosystem II (PSII) (PSII operating efficiency; F q ′ ′ ′ ′ / F m ′ ′ ′ ′ ) and CO 2 assimilation ( φ φ φ φ CO2 ) in leaves were examined. When M. × × × × giganteus was grown at 10 °°°° C, the ratio of the PSII operating efficiency to φ φ φ φ CO2 increased relative to that found in leaves grown at 14 and 25 °°°° C. Similar increases in the F q ′ ′ ′ ′ / F m ′ ′ ′ ′ : φ φ φ φ CO2 occurred in the leaves of two C. longus ecotypes when the plants were grown at 17 °°°° C, compared to 25 °°°° C. These elevations of F q ′ ′ ′ ′ / F m ′ ′ ′ ′ : φ φ φ φ CO2 at low growth temperatures were not attributable to the development of anthocyanins, as has been suggested for maize, and were indicative of the operation of an alternative sink to CO 2 assimilation for photosynthetic reducing equivalents, possibly oxygen reduction via a Mehler reaction, which would act as a mechanism for protection of PSII from photoinactivation and damage. Furthermore, in M. × × × × giganteus grown at 10 °°°° C, further protection of PSII was effected by a 20-fold increase in zeaxanthin content in dark-adapted leaves, which was associated with much higher levels of non-photochemical quenching of excitation energy, compared to that observed in leaves grown at 14 and 25 °°°° C. These differences may explain the long growing season and remarkable productivity of this C 4 plant in cool climates, even in comparison to other C 4 species such as C. longus , which occur naturally in such climates.

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Chilling Stress and Active-Oxygen Enzymes in Zea mays and Zea diploperennis

Cited by 7 publications

References 10 publications

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Effects of Tropospheric Ozone on Potato Plants Protected by the Antioxidant Diphenylamine (DPA)

Low growth temperatures modify the efficiency of light use by photosystem II for CO₂ assimilation in leaves of two chilling‐tolerant C₄ species, Cyperus longus L. and Miscanthus × giganteus

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Chilling Stress and Active-Oxygen Enzymes in Zea mays and Zea diploperennis

Cited by 7 publications

References 10 publications

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Antioxidant enzymes and isoflavonoids in chilled soybean (Glycine max (L.) Merr.) seedlings

Effects of Tropospheric Ozone on Potato Plants Protected by the Antioxidant Diphenylamine (DPA)

Low growth temperatures modify the efficiency of light use by photosystem II for CO2 assimilation in leaves of two chilling‐tolerant C4 species, Cyperus longus L. and Miscanthus × giganteus

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Low growth temperatures modify the efficiency of light use by photosystem II for CO₂ assimilation in leaves of two chilling‐tolerant C₄ species, Cyperus longus L. and Miscanthus × giganteus