Isozyme markers associated with O3 tolerance indicate shift in genetic structure of ponderosa and Jeffrey pine in Sequoia National Park, California

Staszak, J.; Grulke, N.E.; Marrett, M.J.; Prus-Glowacki, W.

Isozyme markers associated with O3 tolerance indicate shift in genetic structure of ponderosa and Jeffrey pine in Sequoia National Park, California

2007

Staszak, J. | Grulke, N.E. | Marrett, M.J. | Prus-Glowacki, W.

Effects of canopy ozone (O3) exposure and signatures of genetic structure using isozyme markers associated with O3 tolerance were analyzed in 20-, 80-, and >200-yr-old ponderosa (Pinus ponderosa Dougl. ex Laws.) and Jeffrey pine (Pinus jeffreyi Grev. & Balf.) in Sequoia National Park, California. For both species, the number of alleles and genotypes per loci was higher in parental trees relative to saplings. In ponderosa pine, the heterozygosity value increased, and the fixation index indicated reduction of homozygosity with increasing tree age class. The opposite tendencies were observed for Jeffrey pine. Utilizing canopy attributes known to be responsive to O3 exposure, ponderosa pine was more symptomatic than Jeffrey pine, and saplings were more symptomatic than old growth trees. We suggest that these trends are related to differing sensitivity of the two species to O3 exposure, and to higher O3 exposures and drought stress that younger trees may have experienced during germination and establishment. Genetic variation in isozyme markers associated with ozone tolerance differed between parental trees and their progeny in two closely related species of yellow pine.

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Mots clés AGROVOC

abiotic stress air pollution alleles alleles analysis california canopy chemistry climate forest ecosystems forest trees gene frequency genetic markers genetic variation genetics heterozygote isozymes land resources national parks oxygen isotopes ozone ozone pinus pinus jeffreyi pinus ponderosa plant ecology plant genetics plant response pollution population genetics recreation species differences time water stress

Informations bibliographiques

Publié dans

Environmental pollution

Volume 149 Numéro 3 Pagination 366 - 375 ISSN 0269-7491

D'autres materias

Elevated atmospheric gases; Tree age; Plant physiology and biochemistry; Conservation of natural resources; Genotype; Tree damage; Growth & development; National forests; Adverse effects; Meteorology and climatology; Stress tolerance; Forestry related; Heterozygosity; Genotype; Miscellaneous plant disorders and injuries; Ecosystem; Plant breeding and genetics; Plant leaves; Interspecific variation; Air pollutants

Langue

anglais

Note

In the special issue: a symposium on air pollution and vegetation effects in national parks and natural areas: implications for science, policy and management / edited by h.s. neufeld and a.h. chapelka. paper presented at the symposium "air pollution workshop", april 10, 2006, charlottesville, virginia

Includes references

2019-12-06

Type

Text; Journal Article

Sur AGRIS depuis: 2024-02-28

Format: MODS

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Cette notice bibliographique a été fournie par National Agricultural Library

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Liens

DOI https://handle.nal.usda.gov/10113/6481

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