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Title:Antioxidant defences of Norway spruce bark against bark beetles and its associated blue-stain fungus
Authors:ID Felicijan, Mateja (Author)
ID Novak, Metka (Author)
ID Kraševec, Nada (Author)
ID Urbanek Krajnc, Andreja (Author)
Files:.pdf Agricultura_2015_Felicijan_et_al._Antioxidant_defences_of_Norway_spruce_bark_against_bark_beetles_and_its_associated_blue-stain_fungus.pdf (532,99 KB)
MD5: 77E17CCBB56A1BC294C6C38295835E15
PID: 20.500.12556/dkum/05787f27-8c7a-46f1-aea6-ce29720a90c9
 
URL https://www.degruyter.com/view/j/agricultura.2015.12.issue-1-2/agricultura-2016-0002/agricultura-2016-0002.xml
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FKBV - Faculty of Agriculture and Life Sciences
Abstract:Bark beetles and their fungal associates are integral parts of forest ecosystems, the European spruce bark beetle (Ips typographus Linnaeus, 1758) and the associated pathogenic blue stain fungus Ceratocystis polonica (SIEM.) C. MOREAU, are the most devastating pests regarding Norway spruce [Picea abies (L.) H. KARST.]. Bark beetles commonly inhabit weakened and felled trees as well as vital trees. They cause physiological disorders in trees by destroying a phloem and cambium or interrupt the transpiration -ow in the xylem. Conifers have a wide range of effective defence mechanisms that are based on the inner bark anatomy and physiological state of the tree. The basic function of bark defences is to protect the nutrient-and energy-rich phloem, the vital meristematic region of the vascular cambium, and the transpiration -ow in the sapwood. The main area of defence mechanisms is secondary phloem, which is physically and chemically protected by polyphenolic parenchyma (PP) cells, sclerenchyma, calcium oxalate crystals and resin ducts. Conifer trunk pest resistance includes constitutive, inducible defences and acquired resistance. Both constitutive and inducible defences may deter beetle invasion, impede fungal growth and close entrance wounds. During a successful attack, systemic acquired resistance (SAR) becomes effective and represents a third defence strategy. It gradually develops throughout the plant and provides a systemic change within the whole tree’s metabolism, which is maintained over a longer period of time. The broad range of defence mechanisms that contribute to the activation and utilisation of SAR, includes antioxidants and antioxidant enzymes, which are generally linked to the actions of reactive oxygen species (ROS). The presented review discusses the current knowledge on the antioxidant defence strategies of spruce inner bark against the bark beetle (Ips typographus) and associated blue stain fungus (Ceratocystis polonica).
Keywords:antioxidants, ascorbate-glutathione system, blue-stain fungus, Norway spruce, phenolics, systemic acquired resistance
Publication status:Published
Publication version:Version of Record
Year of publishing:2015
Number of pages:str. 9-18
Numbering:Letn. 12, št. 1/2
PID:20.500.12556/DKUM-68955 New window
ISSN:1580-8432
UDC:582.47:547.56:577.1:582.28
ISSN on article:1580-8432
COBISS.SI-ID:4128812 New window
DOI:10.1515/agricultura-2016-0002 New window
NUK URN:URN:SI:UM:DK:HO179I1B
Publication date in DKUM:14.11.2017
Views:1703
Downloads:426
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Categories:Misc.
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Record is a part of a journal

Title:Agricultura
Publisher:Univerza v Mariboru, Fakulteta za kmetijstvo, Univerza v Mariboru, Fakulteta za kmetijstvo, Univerzitetna založba Univerze v Mariboru
ISSN:1580-8432
COBISS.SI-ID:116855808 New window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:14.11.2017

Secondary language

Language:Slovenian
Title:Antioksidativni obrambni odziv lubja navadne smreke ob napadu podlubnikov in z njimi povezanimi glivami modrivkami
Abstract:Čeprav so podlubniki in z njimi povezane glive sestavni del gozdnih ekosistemov, sta osmerozobi smrekov lubadar (Ips typographus Linnaeus) in z njim povezana patogena gliva modrivka [Ceratocystis polonica (Siem.) C. Moreau], ena najbolj uničujočih škodljivcev navadne smreke [Picea abies (L.) H. Karsten]. Lubadarji navadno naseljujejo oslabela in podrta drevesa, v specifičnih pogojih pa lahko napadejo tudi vitalna. S poškodbami floema in kambija ter motnjo transpiracijskega toka v ksilemu, drevesu povzročijo številne fiziološke motnje. Iglavci imajo široko paleto obrambnih mehanizmov, ki temeljijo na anatomiji lubja in fiziološkem stanju drevesa. Njihova osnovna funkcija je zaščita hranilno in energetsko bogatega floemskega tkiva, meristematske aktivnosti vaskularnega kambija in transpiracijskega toka v sekundarnem ksilemu debla. Glavno področje obrambnih mehanizmov je namreč sekundarni floem, ki predstavlja fizično in kemično zaščito lubja pred škodljivci, saj vsebuje polifenolne parenhimatske celice, sklerenhim, kristale kalcijevega oksalata in shizogene smolne kanale. Obrambni sistem lubja iglavcev zajema tri vrste obrambnih strategij – konstitutivno in inducirano obrambo ter sistemsko pridobljeno odpornost. Konstitutivna in inducirana obramba zavirata kolonizacijo podlubnikov, rast gliv in zapirata ranitvena mesta. Med uspešnim napadom pa je za drevo ključnega pomena še vzpostavitev sistemsko pridobljene odpornosti (SAR). Le ta se postopoma širi po rastlini ter izzove sistemske spremembe v metabolizmu drevesa, ki se ohranjajo skozi daljše časovno obdobje. Med številnimi obrambnimi odzivi, povezanimi z aktivacijo SAR, sta pomembni sinteza antioksidantov in aktivacija antioksidativnih encimov, ki varujejo rastlino pred reaktivnimi kisikovimi spojinami (ROS). Prispevek zajema pregled dosedanjega znanja o strategijah antioksidativnega odziva lubja smreke pri napadu smrekovega lubadarja (Ips typographus) in z njim povezane patogene glive modrivke (Ceratocystis polonica).
Keywords:antioksidanti, askorbatno-glutationski sistem, gliva modrivka, navadna smreka, fenoli, sistemsko pridobljena odpornost


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