Faculty of Agriculture and Life Sciences, Maribor (FKMB)
-
Application of salicylic acid induces antioxidant defense responses in the phloem of Picea abies and inhibits colonization by Ips typographusUrbanek Krajnc, Andreja ; Kristl, Janja ; Ivančič, Anton, 1953-The adaptive plasticity of Norway spruce (Picea abies) against attack by lps typographus depends on systemic acquired resistance which involves salicylic acid (SA), and an antioxidant system both ... recognized as valuable stress markers in ecophysiological studies. In the presented field experiment, 100 mMSA was applied to the bark sections of Norway spruce prior to being attackedby bark beetles, in order to study interactions with antioxidants and its significance for mediating stress-tolerance under natural conditions. SA-treatments significantly elevated the total SA levels over the whole sampling period. Total glutathoine (tGSH) and total cysteine (tCys) increased by 167 % and 80 %, respectively, two weeks after treatment, in comparison with controls. In contrast, SA-treatment caused an initial deterioartion in total ascorbic acid (tASC) and enhanced the percentage of dehydroasorbic acid (DHA), but activated tASC levels over later sampling dates. The initial bark beetle attack was characterized by a significant decline in total SA levels, which was accompanied by a transient degradation and oxidation of their ascorbate-glutathione system. This initial reaction was significantly alleviated by SA-application and characterized by 175% higher tGSH contents, when compared to moderately-affected untreated trees. One month after pheromone dispensers were placed on trees, an intensification of ascorbate-glutathione system occurred within moderately-affected bark, but to a greater extent after SA-treatment. Total SA levels within SA-treated moderately-affected trees remained at the control level until June. In contrast, strong attack was characterized by a successive increase in total SAup to 252% following SA-treatment in June, whereas a 110% increase of SA was determined within severely affected control-bark. A strong attack was further characterized by a degradation of tGSH and total phenolics (tPH), a moderate increase in tASC and an oxidation of the ascorbate-glutathione pool within untreated bark. In the SA-treated trees the redox state was unaffected by severe colonization and the degradation of antioxidants was significantly alleviated. In addition, SA-treated bark had significantly less entrance holesand exhibited fewer and shorter maternal galleries than control-bark. From this perspective, exogenous SA was successfully implicated as an activator of systemic acquired resistance in Norway spruce, providing tolerance against the complex interactive effects of bark beetle attack and environmental factors.Source: Forest Ecology and Management. - ISSN 0378-1127 (Letn. 261, št. 3, 2011, str. 416-426)Type of material - article, component partPublish date - 2011Language - englishCOBISS.SI-ID - 3066156
Author
Urbanek Krajnc, Andreja |
Kristl, Janja |
Ivančič, Anton, 1953-
Topics
Antioxidant defence system |
Ascorbic acid |
Glutathione |
Ips typographus |
Picea abies |
Phenolics |
Salicylic acid
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|---|
Urbanek Krajnc, Andreja | 28251 |
Kristl, Janja | 17004 |
Ivančič, Anton, 1953- | 16240 |
Source: Personal bibliographies
and: SICRIS
Select pickup location:
Material pickup by post
Delivery address:
Address is missing from the member's data.
The address retrieval service is currently unavailable, please try again.
By clicking the "OK" button, you will confirm the pickup location selected above and complete the reservation process.
By clicking the "OK" button, you will confirm the above pickup location and delivery address, and complete the reservation process.
By clicking the "OK" button, you will confirm the address selected above and complete the reservation process.
Notification
Automatic login and reservation service currently not available. You can reserve the material on the Biblos portal or try again here later.
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
Pickup location | Material status | Reservation |
---|
Reservation in progress
Please wait a moment.
Reservation was successful.
Reservation failed.
Reservation...
Membership card:
Pickup location:
JUNE and SEPTEMBER
Monday - Friday: from 8.00 to 14.00
JULY and AUGUST
Monday - Friday: from 8.00 to 13.00
Contact mail:knjiznica.fkbv@um.si