+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Ozone alters carbon allocation in loblolly pine: assessment with carbon-11 labeling



Ozone alters carbon allocation in loblolly pine: assessment with carbon-11 labeling



Environmental Pollution 64(2): 93-106



Loblolly pine (Pinus taeda L.) seedlings were exposed to 0.120 micromol mol(-1) (ppm) ozone for 7 h per day, 5 days per week for 12 weeks. No visible damage resulted from this regime. A short-lived radioisotope of carbon ((11)C) was used to characterize changes in plant physiology caused by ozone, the first time this technique has been used for ozone exposure studies. In comparison to plants kept in charcoal-filtered air, pines exposed to ozone exhibited reductions in photosynthesis (16%), speed of phloem transport (11%), phloem photosynthate concentration (40%) and total carbon transport toward roots (45%). Photosynthate not transported to the roots appeared to accumulate in the stems. Primary branches of pines exposed to ozone were some 50-60% heavier than those of control pines. Ozone was thus shown to have a significant short-term impact on phloem transport processes that results in a shift in allocation of photosynthate favoring stems.

(PDF emailed within 0-6 h: $19.90)

Accession: 049839623

Download citation: RISBibTeXText

PMID: 15092295

DOI: 10.1016/0269-7491(90)90107-n


Related references

Effects of ozone on carbon allocation and partitioning in loblolly pine seedlings. Plant Physiology (Rockville) 96(1 SUPPL): 99, 1991

Diagnosis of sequential ozone effects on carbon assimilation, translocation, and allocation in cottonwood and loblolly pine. Technical Bulletin National Council of the Paper Industry for Air and Stream Improvement ( 565): 76 pp., 1989

Assessment of carbon allocation with stable carbon isotope labeling. Agronomy Journal 82(1): 18-21, 1990

A stand-level model of carbon allocation and growth, calibrated for loblolly pine. Canadian Journal of Forest Research 27(6): 817-830, 1997

Diurnal changes in allocation and partitioning of recently assimilated carbon in loblolly pine seedlings. Physiologia Plantarum 104(3): 317-328, 1998

The effects of fertilization and competition control on loblolly pine root dynamics and carbon allocation. Ecological Society of America Annual Meeting Abstracts 87: 105-106, 2002

Ozone-induced changes in primary carbon metabolism enzymes of loblolly pine needles. Journal of Plant Physiology 144(3): 300-306, 1994

Respiratory carbon use and carbon storage in mid-rotation loblolly pine (Pinus taeda L.) plantations: the effect of site resources on the stand carbon balance. Global Change Biology 10(8): 1335-1350, 2004

The effects of Pisolithus tinctorius mycorrhizae and phosphorus fertilization on carbon allocation in loblolly pine (P. taeda L.) seedlings. 1993

Effect of ambient levels of ozone on carbon gain of loblolly pine pinus taeda l trees. Bulletin of the Ecological Society of America 72(2 SUPPL): 265-266, 1991

Carbon isotope composition and gas exchange of loblolly and shortleaf pine as affected by ozone and water stress. Stable isotopes and plant carbon water relations: 227-244, 1993

Whole-tree biomass and carbon allocation of juvenile trees of loblolly pine (Pinus taeda): influence of genetics and fertilization. Canadian Journal of Forest Research 31(6): 960-970, 2001

Exposure to an enriched CO2 atmosphere alters carbon assimilation and allocation in a pine forest ecosystem. Global Change Biology 9(10): 1378-1400, 2003

Carbon assimilation allocation and nutrient use efficiency of ponderosa pine as a compensatory response to ozone fumigation and water stress. Bulletin of the Ecological Society of America 72(2 SUPPL): 144, 1991

Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings. Bulletin of the Ecological Society of America 74(2 SUPPL ): 454-455, 1993