Leaf photosynthetic and water relations responses for “Valencia” orange trees exposed to oxidant air pollution

Olszyk, David M.; Takemoto, B.K.; Poe, M.P.

doi:10.1016/0098-8472(91)90041-l

Cited by 14 publications

(8 citation statements)

References 23 publications

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“…Darrali (l'iS9) in her re\ iew stated that the majority of published literature shows an increase in stomatal resistance as a result of fumigation with ozone, and similar results ha\ e been reported more recently (Eamus & Murray. 1991;Farage etal.. 1991;Olszyk, Takemoto & Poe, 1991). However, others have reported either no effects or even decreased resistances (Freer-Smith & Dobson, 1989), or decreased plant water use efficiencies (Reich & Lassoie 1984).…”

Section: D1 S C: I; S S 1 O Nmentioning

confidence: 99%

Seasonal changes in water use of ash trees exposed to ozone episodes

1994

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SUMMARYYoung ash trees {Fraxi?ius excelsior L.) growinii in the field were exposed to episodes of 150 nl 1"' ozone, orlo t:lean air, in open-top chambers at the University of Nottingham, Sutton Bonington Campus, UK, in the summer of 1992. The episodes were fnr 8 h daily and for 1^ d in succession, with a st:asonal total of 27 d. From late-June until mid-September 1992, flow-of water in the stems of individual trees was measured using a heat balance method. Short-term effects of ozone exposure on stem How were not detected-However, in The longer-term, daily integrated stem flow values for the ozone treatment decreased throughout the measurement period relative to the clear air treatment. Further data analysis showed that integrated stem flow values for morning, evening and for the more stable central part of the day changed in a similar way, but this was statistically significant only for the evening period. No treatment differences, however, were detected in night-time water use values.This response was probably mediated by cbanges in stnmatal resistance and, if applicable to other species, has important implications for the long-term growth of trees in regiuns where photochemical ozone is common-

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Section: D1 S C: I; S S 1 O Nmentioning

confidence: 99%

Seasonal changes in water use of ash trees exposed to ozone episodes

1994

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“…For example, orange trees exposed to high O, concentrations exhibited substantially lower qL than control leaves on some days, b u t similar water potentials on most days (Olszyk et al, 1991).…”

Section: Lmplications For Plant Response To the Environmentmentioning

confidence: 99%

Effect of O3 on Hydraulic Architecture in Pima Cotton (Biomass Allocation and Water Transport Capacity of Roots and Shoots)

Grantz

Yang

1996

Plant Physiology

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Pima cotton (Cossypium barbadense 1. cv S-6) exhibits foliar injury and yield reduction at ambient concentrations of O,. We tested the hypotheses that O, reduces the allocation of biomass to the root system, and that this disrupted carbohydrate allocation impairs root hydraulic capacity relative to transpiring leaf area. 60th hypotheses are supported, even though leaf area development Conductance of all organs declined per plant, but only root conductance declined per leaf area by 41 '70. Root resistance increased from 69 to 82% of whole plant resistance, a functional consequence of reduced carbon allocation to roots. Stomatal conductance declined with root hydraulic conductance, protecting short-term leaf water status. Reduced root hydraulic efficiency may mediate O , injury to whole plants by reducing shoot gas exchange and biomass productivity through the inhibition of water and nutrient acquisition.

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“…By contrast, the response of fruit trees and soft fruits to O $ has received limited attention and many of the existing studies have only considered the effects on yield or on specific physiological processes. The only studies taking an integrated approach to yield, growth and gas exchange, or chlorophyll fluorescence characteristics, have been on Citrus chinensis (Olszyk et al, 1990(Olszyk et al, , 1991, Prunus persica (Paolacci et al, 1995), Prunus salicina (Retzlaff et al, 1992(Retzlaff et al, , 1997 and Fragariaiananassa (Takemoto et al, 1988(Takemoto et al, , 1989, whereas effects on yield alone have been investigated in C. chinensis (Thompson & Taylor, 1969 ;Thompson et al, 1972) ; Citrus limon (Thompson & Taylor, 1969), Rubus idaeus (Sullivan et al, 1994) and Vitis vinifera (Soja et al, 1997).…”

Section: mentioning

confidence: 99%

Does elevated ozone have differing effects in flowering and deblossomed strawberry?

Drogoudi

Ashmore

2000

New Phytologist

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Fruiting and deblossomed plants of strawberry (Fragariaiananassa) were exposed to 92 ppb ozone or filtered air in open-top chambers for 69 d. Flower and fruit production, relative growth rate of leaf area, leaf gas exchange and plant biomass were investigated. Ozone caused an initial acceleration in inflorescence production, which was followed by a reduction in inflorescence production, fruit set, and, later, individual fruit weight, although total fruit yield was not affected before the end of the fumigation period. Ozone accelerated leaf senescence and had a greater negative effect on the rate of photosynthesis in older than in younger leaves in fruiting and deblossomed plants, but the response of net photosynthesis to ozone did not differ between the two groups of plants. Relative growth rate of leaf area was the first parameter to be reduced by ozone fumigation, with the effect being significant in fruiting, but not in deblossomed, plants. Final above-ground biomass was also significantly decreased by ozone in fruiting plants, but not in deblossomed plants. Root and crown biomass were not significantly affected by ozone fumigation in either fruiting or deblossomed plants.

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Leaf photosynthetic and water relations responses for “Valencia” orange trees exposed to oxidant air pollution

Cited by 14 publications

References 23 publications

Seasonal changes in water use of ash trees exposed to ozone episodes

Seasonal changes in water use of ash trees exposed to ozone episodes

Effect of O3 on Hydraulic Architecture in Pima Cotton (Biomass Allocation and Water Transport Capacity of Roots and Shoots)

Does elevated ozone have differing effects in flowering and deblossomed strawberry?

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