Tomato response to concurrent and sequential NO2 and O3 exposures

Goodyear, S.N.; Ormrod, D. P.

doi:10.1016/0269-7491(88)90168-6

Cited by 9 publications

(3 citation statements)

References 29 publications

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“…Exposure to the pollutant reduced vegetative growth and reproductive potential, but resistance to the pollutant increased with plant age and was influenced by the plants' history of O $ exposure. Similar findings have been reported previously for this species and others (Dugger & Ting, 1970 ;Blum & Heck, 1980 ;Reinert & Henderson, 1980 ;Walmsley et al, 1980 ;Goodyear & Ormrod, 1988 ;Kasana, 1991 ;Younglove et al, 1994).…”

Section: supporting

confidence: 92%

Influence of plant age on ozone resistance in Plantago major

Lyons¹,

Barnes²

1998

New Phytologist

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$ on growth and reproductive performance confirmed the sensitivity of the population to the pollutant. In the absence of the development of typical visible symptoms of foliar damage, the total d. wt of plants maintained in O $ over a 56-d period was 35 % lower than that of control plants. However, the impact of the pollutant was found to decrease as plants aged. Plant relative growth rate (R E ) was only affected in seedlings, suggesting that effects of O $ on seedling growth were largely responsible for the decrease in accumulated biomass ; the growth rate of older plants was not affected by O $ . The observed shift in O $ resistance with plant age was mediated by both ' acclimation ' and ontogenetic changes. ' Acclimation ' was not associated with changes in O $ uptake, and there was some evidence to support the existence of compensatory growth responses. In addition to effects on vegetative growth, plants exhibited an O $ -induced decline in reproductive performance ; O $ reducing the number of flower spikes and seed capsules produced per plant. Ozone episodes administered at different stages of development indicated that reproductive development was particularly sensitive to O $ during the early stages of flowering.The findings of this study are discussed in relation to evolutionary adaptation to O $ in natural plant communities.The importance of plant age, prior exposure to the pollutant and the timing of O $ episodes in relation to plant developmental stage are highlighted.

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Section: supporting

confidence: 92%

Influence of plant age on ozone resistance in Plantago major

Lyons¹,

Barnes²

1998

New Phytologist

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mentioning

confidence: 99%

“…rather than sequential exposure (Hogsett et at.. Plants are frequently exposed to phytotoxic gases 1984; Runeckles & Palmer, 1987;Goodyear & that can occur in varying mixtures in the atmosphere. Ormrod, 1988). Combinations of O3 and NO2 can Ozone (O3) and nitrogen dioxide (NO^) are major cause reductions in growth and productivity in a gaseous pollutants during the growing season and number of species (Kress & Skeily, 1982; USEPA, have long been known as toxic to agricultural plants.…”

mentioning

confidence: 99%

Response of nitrogen metabolism in beans (Phaseolus vulgaris L.) after exposure to ozone and nitrogen dioxide, alone and in sequence

Bender¹,

Weigel²,

Jäger³

1991

New Phytologist

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summary Bush bean (Phaseolus vulgaris L.) plants were exposed to low levels of ozone (O3) and/or nitrogen dioxide (NO2) in open‐top chambers during the growing seasons of 1988 and 1989. Treatments consisted of charcoal‐filtered (CF) air, and CF air enriched with either O3 (50–60 nll −1), NO2 (30–40 nll−1) or both gases. A daily sequential exposure, O2 followed by NO2, was used in each year in the combined treatment: O2 was added for 8 h d−1 from 08.00 h until 16.00 h, and NO2 for 16 h d−1 from 16.00 h until 08.00 h. Growth variables and key enzymes of N assimilation in leaves were investigated during vegetative growth and at anthesis. Pollutant effects varied between years. No significant effects were found in 1988. In 1989 NO2, alone or in sequential exposure with O3+, increased leaf dry weight and total biomass until anthesis. Moreover, there was a parallel increase in the extractable activity of both nitrate and nitrite reductase in the NO2 treatments during vegetative growth, while glutamine synthetase and glutamate dehydrogenase were only increased by sequential exposure to O3+ NO2. In contrast, during anthesis the activities of nitrite reductase and glutamine synthetase were lowest in leaves sequentially exposed to O3+ NO2. Ozone alone had very little effect on N metabolism but suppressed growth during anthesis. At pod maturity, the lowest leaf dry weight and leaf area occurred in plants exposed to the sequential combination of O3+ NO2, but yield (pod weight) was not significantly affected by any of the pollutant treatments. It is concluded that chronic exposure especially to the sequence O3−NO2 reduced the capacity of the plants for N assimilation. The observed shift in nitrogen metabolism during the plants' development may have contributed to the adverse effects of the sequential treatment O3+ NO2 on growth variables at the end of the exposure period.

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Ozone Stress Impacts on Plant Life

Bender

Weigel

2002

Modern Trends in Applied Terrestrial Ecology

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Tomato response to concurrent and sequential NO2 and O3 exposures

Cited by 9 publications

References 29 publications

Influence of plant age on ozone resistance in Plantago major

Influence of plant age on ozone resistance in Plantago major

Response of nitrogen metabolism in beans (Phaseolus vulgaris L.) after exposure to ozone and nitrogen dioxide, alone and in sequence

Ozone Stress Impacts on Plant Life

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