Attempt to induce lightwood in eastern hemlock by treating with paraquat

Journal Article · Thu Jan 01 00:00:00 EST 1976 · Wood Sci.; (United States)

OSTI ID:5060514

Kiatgrajai, P ^[1]; Rowe, J W; Conner, A H; Peters, W; Roberts, D R

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1. Univ. of Wisconsin, Madison

Treatment of eastern hemlock (Tsuga canadensis (L.) Carr.) with the herbicide paraquat did not induce formation of lightwood. However, a dead zone of phloem extended above the paraquat-treatment site. Traumatic resin ducts were observed in the wood immediately adjacent to this dead zone. Although some of these ducts were filled with resin, most were empty. A very small amount of resin soaking was observed at the edges of the dead phloem. Although there was an increase in the extractives content of the wood behind the dead phloem, this did not reach levels with commercial potential. The increase in turpentine level was mostly due to slightly volatile waxes. The nonvolatile ether extractives were predominately acids other than the fatty and resin acids typical of pines. Electron microscopy revealed fungal hyphae in the wood behind the dead phloem, and several species of fungi were cultured from the wood.

• OSTI ID: 5060514
• Journal Information: Wood Sci.; (United States), Vol. 8:3
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
HERBICIDES
BIOLOGICAL EFFECTS
TREES
TOLERANCE
CHEMICAL COMPOSITION
FUNGI
PLANT TISSUES
RESINS
TOXICITY
TURPENTINE
WOOD
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
PESTICIDES
PETROCHEMICALS
PETROLEUM PRODUCTS
PLANTS
POLYMERS
SOLVENTS
TERPENES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
551000 - Physiological Systems