Ozone-induced necrosis and increased peroxidase activity in hybrid poplar (Populus sp.) leaves

Patton, Roy L.; Garraway, Michael O.

doi:10.1016/0098-8472(86)90006-7

Cited by 24 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Studies on these species have been conducted over several decades regarding their ecological physiology, including photosynthesis and respiration (Fung et al 1998;Chen et al 2006;Wang et al 2007), chemical stresses caused by atmospheric acidification (Patton and Garraway 1986;Chappelka et al 1988;Rizzo et al 2007), water stress (Cannon and Roberts 1995;Maxwell et al 1997), and flooding (Liu and Dickmann 1993;Cao and Connerb 1999). In northwest China, studies on salt tolerance of Populus species, mainly P. euphratica, have increased as a result of soil salinization in arid and semiarid regions (Ma et al 1997;Fung et al 1998;Chen et al 2003a, b;Yu et al 2006).…”

Section: Introductionmentioning

confidence: 98%

Growth, photosynthesis, and ion distribution in hydroponically cultured Populus alba L. cuttings grown under various salinity concentrations

et al. 2008

View full text Add to dashboard Cite

Growth, photosynthesis, and Na + , K + , and Ca 2+ distributions were investigated in 2-year-old hydroponically cultured Populus alba L. cuttings exposed to salt stresses (0, 0.85, 8.5, 17, and 85 mM NaCl in experiment 1 and 0, 50, 100, 150, and 200 mM in experiment 2) for 4 weeks in 2/5 Hoagland solution. Salt did not markedly inhibit height growth and diameter increment in 150 and 100 mM NaCl, respectively. The 85 mM NaCl treatment increased the dry weights of roots and total dry weight of plants, while 150 mM NaCl significantly reduced the dry weights of leaves, stems, and total plant weight. The decline in the photosynthetic rate lagged 2 weeks behind that of stomatal conductance in the 50 and 100 mM salt solutions. Different ions exhibited different distributions in different parts of the plant. Most Na + ions were excluded and/or compartmentalized in roots at low and moderate salt stress (B50 mM). K + content in leaves increased with the increase in the salt concentration in the growth solutions.

show abstract

Section: Introductionmentioning

confidence: 98%

Growth, photosynthesis, and ion distribution in hydroponically cultured Populus alba L. cuttings grown under various salinity concentrations

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Free-radical scavenging capability of leaf tissue has been reported as a mechanism of O $ tolerance (Freebain, 1960 ;Lee et al, 1984 ;Patton & Garraway, 1986 ;Guzy & Heath, 1993), and ascorbic acid (AA) and glutathione (GSH) are known freeradical scavengers that occur in plants (Luwe & Heber, 1995 ;Smirnoff, 1996 ;Sheng et al, 1997). Ascorbic acid functions to detoxify O $ in both the apoplast and symplast (Smirnoff, 1996), but the detoxification by apoplastic AA is not sufficient to protect leaf tissue (Luwe & Heber, 1995).…”

Section: mentioning

confidence: 99%

The response of clones of Populus tremuloides differing in sensitivity to ozone in the field

Yun

Laurence

1999

New Phytologist

View full text Add to dashboard Cite

Ozone (O $ )-sensitive and tolerant clones of aspen (Populus tremuloides) were exposed to O $ at 1n0, 1n7 and 3n0 times the concentration in ambient air at Ithaca, NY, USA (i1n0, i1n7 and i3n0) for 3 months. Visible foliar injury occurred within a few days of the initiation of treatments and developed continuously in i1n7 and i3n0 treatments. Leaf senescence began earlier in trees exposed to greater-than-ambient treatments. Gas-exchange variables were measured five times over the growing season. Net photosynthesis was progressively decreased and finally reduced by 40 and 70% on tolerant and sensitive clones, respectively, but stomatal conductance was not affected by the O $ treatments. As stomatal conductance (g s ) values did not differ in the two types of aspen, we conclude that this is not the defense mechanism to O $ in aspen. At the end of the season, dry weight was reduced by up to 55 and 35% in sensitive and tolerant clones, respectively. Ozone effects were significant and linear on foliar injury, biomass and growth variables such as height, diameter of stem and total leaf area. The levels of two antioxidants, ascorbic acid and glutathione, were investigated to determine if a clonal difference occurred. Concentrations of the free-radical scavengers did not differ in the clones, nor did they seem to be induced by O $ . A cumulative O $ index, SUM06 (the sum of the total µl l −" of exposure when the O $ concentration exceeded 0n06 µl l −" ), was highly correlated with most foliar injury variables and gas-exchange variables except g s in higher O $ treatments. The reduction of carbon gain due to O $ is discussed with regard to foliar damage and biomass decrease.

show abstract

“…The difference between two aspen clones in response to O $ can be considered a biochemical characteristic internal to the leaf. Freeradical scavenging capability of leaf tissue has been reported as a mechanism of ozone tolerance (Guzy & Heath, 1993 ;Lee et al, 1984 ;Patton & Garraway, 1986), and AA and GSH are known free-radical scavengers that occur in plants (Luwe & Heber, 1995 ;Smirnoff, 1996).…”

Section: mentioning

confidence: 99%

The response of sensitive and tolerant clones of Populus tremuloides to dynamic ozone exposure under controlled environmental conditions

Yun

Laurence

1999

New Phytologist

View full text Add to dashboard Cite

Both sensitive and tolerant clones of aspen (Populus tremuloides) were exposed to ozone using four different exposure regimes under controlled environmental conditions. Based on data on ambient ozone from 10 cities in the USA, three treatments of 4-wk exposure to the same SUM06 (an accumulation of hourly O $ concentrations greater than 0.06 ml l −" ) were constructed. The regimes allowed us to investigate : (a) the importance of long (3 wk, treatment 1) versus short (1 wk, treatment 2) duration of regimes with high peaks ; (b) the effect of treatments with variable peak occurrence (treatments 1 and 2) versus uniform peak occurrence (treatment 3) during the exposure period. Nonfumigated control plants were maintained at ozone concentrations 10 nl l −" . Bifacial black necrosis, a typical symptom of ozone injury on aspen leaves, occurred on both clones after 2 wk exposure. Up to 60 % of the leaves on the sensitive clone were injured, with an average of 6 % of total leaf area injured. In the tolerant clone only 10 % of the leaves were injured, with less than 1 % of the total leaf area symptomatic. The severity of injury was consistently greatest in treatment 2, followed by treatments 1 and 3, respectively. The interval between peak exposures was less important than the occurrence of peaks versus a stable maximum concentration. Premature leaf abscission occurred in the sensitive clone. Measures of gas exchange demonstrated reduced photosynthesis under ozone fumigation, but exposure regime was not a significant factor. Concentrations of two antioxidants, ascorbic acid and glutathione, were almost always greater in the resistant than in the sensitive clone, but the differences were not statistically significant. The levels of these antioxidants in aspen leaves did not change with ozone fumigation or leaf age.

show abstract

Ozone-induced necrosis and increased peroxidase activity in hybrid poplar (Populus sp.) leaves

Cited by 24 publications

References 22 publications

Growth, photosynthesis, and ion distribution in hydroponically cultured Populus alba L. cuttings grown under various salinity concentrations

Growth, photosynthesis, and ion distribution in hydroponically cultured Populus alba L. cuttings grown under various salinity concentrations

The response of clones of Populus tremuloides differing in sensitivity to ozone in the field

The response of sensitive and tolerant clones of Populus tremuloides to dynamic ozone exposure under controlled environmental conditions

Contact Info

Product

Resources

About