INVASION OF PHLOEM AND XYLEM OF WOODY STEMS AND ROOTS OF EUCALYPTUS-MARGINATA AND PINUS-RADIATA BY PHYTOPHTHORA-CINNAMOMI

被引:41
作者
DAVISON, EM
STUKELY, MJC
CRANE, CE
TAY, FCS
机构
关键词
JARRAH DIEBACK; MONTEREY PINE;
D O I
10.1094/Phyto-84-335
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Woody stems and roots of field-grown Pinus radiata (pine) and Eucalyptus marginata (jarrah) were inoculated with Phylophthora cinnamomi, and the progress of invasion was investigated by sampling wood and bark 1, 3, 6, and, in some cases, 12 wk after inoculation. P. cinnamomi rapidly invaded phloem and xylem of both species, and a hemibiotrophic infection developed in the phloem. In jarrah and in some pine stem and root samples, an inapparent infection was established in the xylem, but in other pine samples, invaded wood became dry and/or resin soaked. This fungus persisted longer in and was more frequently isolated from wood than from bark. In jarrah, xylem invasion was confined to a narrow band adjacent to the cambium, whereas in pine wood radial invasion was more extensive. In some pine stems, a segment of nonconducting wood formed adjacent to the inoculation point; this did not occur in jarrah. Tissue invasion in both species was less extensive after inoculation during autumn than during spring. In all experiments, invasion was restricted by host responses to infection.
引用
收藏
页码:335 / 340
页数:6
相关论文
共 30 条
[1]  
[Anonymous], 1968, PLANT PATHOLOGISTS P
[2]  
Bailey J. A., 1983, DYNAMICS HOST DEFENC, P1
[3]   ROLE OF PHYTOPHTHORA-CRYPTOGEA AND WATERLOGGING IN A DECLINE OF PINUS-RADIATA [J].
BUMBIERIS, M .
AUSTRALIAN JOURNAL OF BOTANY, 1976, 24 (06) :703-709
[4]   CHANGES IN CYTOKININ CONCENTRATIONS IN XYLEM EXTRUDATE FOLLOWING INFECTION OF EUCALYPTUS-MARGINATA DONN-EX-SM WITH PHYTOPHTHORA-CINNAMOMI RANDS [J].
CAHILL, DM ;
WESTE, GM ;
GRANT, BR .
PLANT PHYSIOLOGY, 1986, 81 (04) :1103-1109
[5]  
Chevis H. W., 1982, Australian Forestry, V45, P193
[6]  
CHOU CKS, 1987, EUR J FOREST PATHOL, V17, P398
[7]  
COUTTS MP, 1976, EUR J FOREST PATHOL, V6, P372
[8]   A COMPARISON OF WATER RELATIONS, VISUAL SYMPTOMS, AND CHANGES IN STEM GIRTH FOR EVALUATING IMPACT OF PHYTOPHTHORA-CINNAMOMI DIEBACK ON EUCALYPTUS-MARGINATA [J].
CROMBIE, DS ;
TIPPETT, JT .
CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE, 1990, 20 (02) :233-240
[9]  
DAVISON E M, 1989, New Zealand Journal of Forestry Science, V19, P277
[10]   THE EFFECT OF WATERLOGGING ON SEEDLINGS OF EUCALYPTUS-MARGINATA [J].
DAVISON, EM ;
TAY, FCS .
NEW PHYTOLOGIST, 1985, 101 (04) :743-753