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Gardner, D. E., and O. S. Cannon. 1972. Unusual symptomatology of curly top in susceptible-resistant grafted tomato plants. Phytopathology 62:187-190.
ABSTRACT
Grafted tomato plants comprised of Lycopersicon esculentum (curly top-susceptible) tops and L. peruvianum var. dentatum or L. peruvianum var. humifusum (curly top-resistant) lower stems and roots were inoculated with virulent isolates of curly top virus. Vein clearing, leaf contortion and curling leaf-stiffening, vein thickening, stunting, and phloem abnormalities of severity comparable to that in diseased nongrafted susceptible plants occurred in the scions. Yellowing typical of that in diseased-susceptible controls did not immediately accompany these symptoms in grafted plants, however, and photosynthetic tissue of these plants accumulated abnormally high chlorophyll concentrations. Longevity in grafted plant scions was greatly extended in comparison with that of controls. All of the diseased grafted plants eventually died, however. Inoculated reciprocal grafts (L.peruvianum var. dentatum scions and L. esculentum roots) exhibited the opposite reaction.. The resistant scions developed yellowing, but this was not accompanied by other curly top symptoms typical of susceptible tomatoes. A separation of symptoms into at least two groups was therefore evident: those involving chlorophyll degeneration and those associated with internal and external morphological abnormalities (including vein clearing).

FULL TEXT
Full text not available for this publication.

HOSTS
Lycopersicon sp. - Tomato

PATHOGENS
No pathogen information available for this publication.


RELEVANT TO BIOCONTROL
No.

KEY WORDS
Transportable chlorophyll-affecting factor, Lycopersicon, Tomato.

IMAGES
01_080 -- vf7/1246 grafted green stem (vf7 portion) abnormal phloem a 01_080 - vf7/1246 grafted green stem (vf7 portion) abnormal phloem a
PATHOGEN: Aspergillus melleus
01_081 -- vf7/1246 grafted greeen stem (vf7 portion) abnormal phloem 01_081 - vf7/1246 grafted greeen stem (vf7 portion) abnormal phloem
PATHOGEN: Aspergillus melleus
01_082 -- vf7/1246 grafted green stem (vf7 portion) abnormal phloem c 01_082 - vf7/1246 grafted green stem (vf7 portion) abnormal phloem c
PATHOGEN: Aspergillus melleus
01_083 -- phloem of healthy vf7 01_083 - phloem of healthy vf7
PATHOGEN: Aspergillus melleus
01_084 -- phloem of healthy vf7 01_084 - phloem of healthy vf7
PATHOGEN: Aspergillus melleus
01_085 -- 3 diseased LB plants; LB/ dentatum grafts (diseased), plants all same age 01_085 - 3 diseased LB plants; LB/ dentatum grafts (diseased), plants all same age
PATHOGEN: Aspergillus melleus
01_086 -- 2 diseased LB plants; two diseased LB/dentatum grafts 01_086 - 2 diseased LB plants; two diseased LB/dentatum grafts
PATHOGEN: Aspergillus melleus
01_087 -- both plants same age; LB with curly top, healthy, control, no grafts 01_087 - both plants same age; LB with curly top, healthy, control, no grafts
PATHOGEN: Aspergillus melleus
01_088 -- 1 month after inoculation, same age plants, LB and LB/dentatum graft 01_088 - 1 month after inoculation, same age plants, LB and LB/dentatum graft
PATHOGEN: Aspergillus melleus
01_089 -- 1 month after inoculation, same age plants, LB and LB/dentatum graft 01_089 - 1 month after inoculation, same age plants, LB and LB/dentatum graft
PATHOGEN: Aspergillus melleus
01_090 -- 1 month after inoculation, 2 LB, 2 LB/dentatum grafts, healthy LB 01_090 - 1 month after inoculation, 2 LB, 2 LB/dentatum grafts, healthy LB
PATHOGEN: Aspergillus melleus
01_091 -- 1 month after inoculation, LB, LB/dentatum graft, all plants the same age 01_091 - 1 month after inoculation, LB, LB/dentatum graft, all plants the same age
PATHOGEN: Aspergillus melleus
01_092 -- 1 month after inoculation, LB, LB/dentatum graft, all plants the same age 01_092 - 1 month after inoculation, LB, LB/dentatum graft, all plants the same age
PATHOGEN: Aspergillus melleus
01_093 -- 1246/vf7 graft non-inoculated; 1246/vf7 inoculated; 1246 inoculated 01_093 - 1246/vf7 graft non-inoculated; 1246/vf7 inoculated; 1246 inoculated
PATHOGEN: Aspergillus melleus
01_094 -- inoculated LB, inoculated LB/dentatum graft, healthy plant 01_094 - inoculated LB, inoculated LB/dentatum graft, healthy plant
PATHOGEN: Aspergillus melleus
01_095 -- inoculated LB and LB/dentatum graft 01_095 - inoculated LB and LB/dentatum graft
PATHOGEN: Aspergillus melleus
05_071 -- 1246/vf7 grafts 05_071 - 1246/vf7 grafts
PATHOGEN: Aspergillus melleus
05_072 -- 1246/vf7 grafts 05_072 - 1246/vf7 grafts
PATHOGEN: Aspergillus melleus

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