Agriculture

Mechanisms of Woody Plant Defenses Against Insects: Search by William J. Mattson, Jean Levieux, C. Bernard-Dagan

By William J. Mattson, Jean Levieux, C. Bernard-Dagan

In 1984, a brand new examine operating celebration on mechanismsofwoody plant resistance opposed to bugs and pathogens(lUFROS2. 05-06) was once shaped within the foreign Union ofForestryResearchOrganizations. Thepurposeofthisworkingparty istostimulate and facilitate learn development during this areathroughenhancedcommunication between themany researchscientistsscatteredamongthevariouscountriesoftheworld. This quantity istheresultofthe first internationalsymposiumofthisworkingparty, which came about in Orleans. France on August 26-29, 1986. thank you are because of Institute Nationalde laRechercheAgronomique, StationdeZoologie, Forestiere, fortheir in strumental half in organizingthis symposium, and to the collage and the Cityof Orleansforgenerousfinancial help. The intentofthis court cases is to (a) collect adiverse array ofresearch resultsonthemechanismsofwoodyplantresistanceagainstdifferentkindsofinsects. and(b) to go looking for threadsofcommonality between those various plant/insect as sociationstofurtherourfundamental understandingofhowplantsdefendthemselves againstphytophagousorganisms. Theresearchpapersareorganizedintothreemaingroups. Thefirstgroupexamines plant defenses from a variety of easy physiological and ecological issues. the rest papers, that are mostly case studiesofplant resistance opposed to bugs. arecategorizedon the basisofinsect intimacy with host tissues: (a) hugely cellular. unfastened feeders suchas moth larvae andsawflies, and (b)poorlymobile, "attached" or imbeddedfeederssuchasaphids, scales, miners, andbarkbeetles. Eachofthesesections isfurtherorganizedonthebasisofkindoftissueattackedbytheinsects, eitherleaves orstern/shootcortexand vasculartissues. Contents Preface v members IX I. easy Physiological and Ecological issues I. DefensiveStrategiesofWoody PlantsAgainst various Insect-Feeding Guilds in terms of Plant Ecological Strategiesand IntimacyofAssociation with bugs W. J. Mattson. R. ok. Lawrence, R. A. Haack, D. A. Herms, and p. J. Charles three 2. in the direction of a UnifiedTheoryofPlant protection A. A. Berryman. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3lJ three. DefensiveResponsesofTrees inRelationtoTheirCarbon/NutrientBalance J. Tuomi, P. Niemela, F. S. Chapin,1II, J. P. Bryant, andS. Siren fifty seven four. GrowthandDifferentiation.BalanceRelationshipsinPinesAffectTheirRe. sistance to Bark Beetles(Coleoptera: Scolytidae) P. L. Lorio, Jr. seventy three five. SeasonalVariations inEnergySourcesandBiosynthesisofTerpenes in Maritime Pine C. Bernard-Dagan ninety three 6. Terpene Biosynthesis less than PathologicalConditions C. Cheniclet, C. Bernard-Dagan, andG.

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Newly formed cell fragments initiate phase I reactions in adjacent parenchyma cells. In this way, controlled defensive metabolism is initiated in cells ahead of the invasion front, while hyperactive, degenerative metabolism continues just in advance of the invader. , Haukioja 1980, Bryant 1981). The induced defensive system of plants forms a flexible mechanism for dealing with injury and infection; the intensity of the reaction may be a graded response proportional to the persistence of the attack.

1982. The susceptibility of jack pine from Lake States seed sources to insects and diseases. St. Paul, MN: North Central Forest Experimental Station. Res. Pap. NC-235. Holloway, J. D. and P. D. N. Hebert. 1979. Ecological and taxonomic trends in macrolepidopteran host plant selection. BioI. J. Linn. Soc. 11: 229-251. Hong, S. , G. S. Thun, S. I. Sohn, K. S. Kim, and H. S. Park. 1985. Research on breeding pines resistant to the pine gall midge in Korea. In: Proceedings, Joint Conference of IUFRO Working Parties on forest gall midges and rusts of pines ( J.

In: Carbon uptake and allocation in subalpine ecosystems as a key to management (R. H. Waring, Ed). Forestry Res. ; 45-51. Bryant, J. , F. S. Chapin III, P. Reichardt, and T. Clausen. 1985. Adaptation to resource availability as a determinant of chemical defense strategies in woody plants. Recent Adv. Phytochem. 19: 219-237. Campbell, R. W. and R. J. Sloan. 1977. Forest stand responses to defoliation by the gypsy moth. For. Sci. Monogr. 19. Carpenter, T. , W. W. Neel, and P. A. Hedin. 1979. A review of host plant resistance of pecan, Carya illinoensis, to Insecta and Acarina.

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