Effects of 15% CO/sub 2/ on the accumulation of the phytoalexin phaseollin in Phaseolus vulgaris in response to mechanical injury and to infection by Colletotrichum lindemuthianum

Journal Article · Fri Apr 15 00:00:00 EST 1977 · Can. J. Bot.; (United States)

OSTI ID:7323727

Arnold, R M; Rahe, J E

Accumulation of phaseollin at sites of point-freezing injury on etiolated hypocotyls of Phaseolus vulgaris occurred in air but was prevented when seedlings were placed in air containing 15 percent CO/sub 2/ immediately after injury. The inhibitory effect was partially overcome when CO/sub 2/-treated seedlings were returned to air. Phaseollin accumulation in 15 percent CO/sub 2/ did occur, however, when injured seedlings were maintained in air for 3-9 h before being transferred to CO/sub 2/, indicating that the sensitivity to CO/sub 2/ lies at an early stage of the process leading to phaseollin production. In contrast, phaseollin accumulation at sites of infection of P. vulgaris by an incompatible race of Colletotrichum lindemuthianum was not inhibited by 15 percent CO/sub 2/. These results indicate that the processes leading to the accumulation of phaseollin at incompatible infection sites and at injury sites may be regulated differently.

• Research Organization: Simon Fraser Univ., Burnaby, B. C.
• OSTI ID: 7323727
• Journal Information: Can. J. Bot.; (United States), Vol. 55:8
• 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
BIOSYNTHESIS
INHIBITION
CARBON DIOXIDE
BIOLOGICAL EFFECTS
BIOLOGICAL ACCUMULATION
FUNGI
INFECTIVITY
INJURIES
PATHOGENESIS
PHASEOLUS
BIOMASS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
LEGUMINOSAE
OXIDES
OXYGEN COMPOUNDS
PLANTS
RENEWABLE ENERGY SOURCES
SYNTHESIS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
550200 - Biochemistry