CYTOTOXICITY AND INSECTICIDAL ACTIVITY OF ENDOPHYTIC FUNGI FROM BLACK SPRUCE (PICEA-MARIANA) NEEDLES

被引:24
作者
JOHNSON, JA [1 ]
WHITNEY, NJ [1 ]
机构
[1] UNIV NEW BRUNSWICK,DEPT FOREST RESOURCES,FREDERICTON E3B 5A3,NB,CANADA
关键词
ENDOPHYTIC FUNGI; BUDWORM; CHORISTONEURA FUMIFERANA; PICEA MARIANA; TOXICITY;
D O I
10.1139/m94-004
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Hyphae and hyphal extracts from fungi isolated from inside healthy black spruce needles were assayed for their effect on spruce budworm (Choristoneura fumiferana Clem.) cell cultures and larvae. Isolates were from needles of four age-classes (current 3 years old) collected throughout a 4-month sampling period. Hyphal extracts from 21 of the 100 isolates tested were toxic to spruce budworm cell cultures and isolates from older needles (2 and 3 years old) negatively affected cells more frequently (p < 0.05) than isolates from younger needles (current and 1 year old). Hyphae from five isolates and hyphal extracts from seven increased mortality (p < 0.05) when fed to second instar larvae in a laboratory bioassay. Development was delayed and larval dry mass reduced when budworm were fed hyphae from Cryptocline abietina Petrak (isolate number 69). Larval dry mass was reduced when budworm were fed the extract from Aureobasidium pullulans (de Bary) Am. (isolate 87) but increased when fed Cryptocline abietina (isolates 40 and 80), a coelomycete (isolate 12), and Hormonema dematioides (isolates 28, 63, and 96).
引用
收藏
页码:24 / 27
页数:4
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