Ozone Responses of Trees: Results from Controlled Chamber Exposures at the GSF Phytotron

Langebartels, Christian; Ernst, Dieter; Heller, Werner; Lütz, Cornelius; Payer, Hans-Dieter; Sandermann, Heinrich

doi:10.1007/978-3-642-59233-1_6

Cited by 44 publications

(20 citation statements)

References 88 publications

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“…The former, on the other hand, displayed considerable induction of phenolics upon infection with Sirococcus. Increased levels of catechin were previously observed as a response to ozone (Heller et al 1990;Langebartels et al 1998). Phenolics are therefore considered part of the plant defence system against both biotic and abiotic stresses.…”

Section: Discussionmentioning

confidence: 88%

Controlled inoculation of Norway spruce (Picea abies) with Sirococcus conigenus: PCR-based quantification of the pathogen in host tissue and infection-related increase of phenolic metabolites

Bahnweg

Schubert

Kehr³

et al. 2000

Trees

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Controlled inoculation of spruce seedling needle crowns and of shoots of 4-year-old spruce trees by Sirococcus conigenus led to disease symptoms (discoloration and necrosis) and to the induction of phenolic metabolites. Even upon complete infection, as proved by reisolation of the pathogen from inoculated seedlings, only 40% of the plants developed visible disease symptoms after 38 days. A Sirococcus-specific polymerase chain reaction (PCR) primer pair, SIRO1 and SIRO6, was designed based on sequences of a RAPD fragment. The primer pair permitted the detection of 1 pg fungal DNA (10-40 genomes) in 1 mg fresh weight spruce tissues (needles, bark, wood), regardless of visible disease symptoms. The amounts of the major phenolic compound of spruce needles, catechin, increased significantly in all of the five spruce provenances as a response to inoculation with Sirococcus. The second major phenolic compound, picein, increased in three of the provenances, whereas the remaining two had high concentrations to begin with and showed no reaction. Minor phenolic compounds increased in response to infection regardless of provenance. In a preliminary field study, Sirococcus infection of spruce was detectable by PCR even in the presence of massive infection by other fungi, such as Rhizospaera spp. and Lophodermium spp.

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Section: Discussionmentioning

confidence: 88%

Controlled inoculation of Norway spruce (Picea abies) with Sirococcus conigenus: PCR-based quantification of the pathogen in host tissue and infection-related increase of phenolic metabolites

Bahnweg

Schubert

Kehr³

et al. 2000

Trees

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show abstract

“…Absence of this close linkage and the presence of an ozone ''memory'' appear to be special properties of conifers (Langebartels et al, 1997).…”

Section: Conclusion: a New Scenario For Ozone Phytotoxicitymentioning

confidence: 98%

Memory Effects in the Action of Ozone on Conifers

Langebartels

Heller

Führer³

et al. 1998

Ecotoxicology and Environmental Safety

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“…The differences in the chl a, chl a + b and car concentrations in the c + 1 needles between the WW and DS NF + O 3 seedlings in May 1999 also suggest that the WW NF + O 3 seedlings had not (yet) been able to compensate for the O 3 -induced chlorophyll loss [31]. The lower chl a + b/car ratio in the c needles of the NF + O 3 seedlings compared to that in the c needles of the CF seedlings points to a carry-over effect [23]. Table 3 The total element content (% dry weight) of the c and c + 1 needles sampled on 9 October 1998 (df error = 12) …”

Section: Cumulative and Carry-over O 3 Effects On The Pigmentsmentioning

confidence: 99%