Cytomorphological studies of the pycnial and aecial stages of Cerotelium dicentrae

1971 ◽  
Vol 49 (5) ◽  
pp. 783-785
Author(s):  
Burton M. Berkson
Keyword(s):  
Host Plant ◽  
Germ Tube ◽  
Dikaryotic Mycelium

The development of the monokaryotic and dikaryotic mycelia was studied cytologically. The monokaryotic mycelium of Cerotelium dicentrae appears to be systemic within the Dicentra cucullaria host plant and the dikaryotic mycelium is initiated upon pycniospore germ-tube penetration of the Dicentra leaf.

Neozygites fresenii. [Descriptions of Fungi and Bacteria].

1984 ◽  
Author(s):  
N. Wilding
Keyword(s):  
Host Plant ◽  
Geographical Distribution ◽  
Germ Tube ◽  
Aphis Fabae ◽  
Insect Cuticle ◽  
Plant Tissues ◽  
Neozygites Fresenii ◽  
The Tropics ◽  
Aphid Populations

Abstract A description is provided for Neozygites fresenii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aphids (Homoptera: Aphididae) especially species of the genus Aphis. GEOGRAPHICAL DISTRIBUTION: Very widespread, including Europe, N. & S. America, Asia, Africa, Polynesia. DISEASE: Capilloconidia adhere to the aphid by the sticky apical droplet. A germ tube is produced which forms an appressorium on the insect cuticle and a tube from the appressorium then penetrates it. Aphids killed by N. fresenii characteristically hang from the stems and the underside of leaves of the host plant by the proboscis inserted in the plant tissues. Aphis fabae killed by this species are orange in colour when dry and grey in moist conditions as the fungus begins to sporulate. This fungus is most frequently associated with dense populations of aphids in warm seasons and is unusual in attacking aphid populations in the tropics.

II. On the origin of parasitism in fungi

1905 ◽  
Vol 197 (225-238) ◽  
pp. 7-24 ◽  
Keyword(s):  
Cell Wall ◽  
Host Plant ◽  
Epidermal Cell ◽  
Cell Walls ◽  
Germ Tube ◽  
Guard Cells ◽  
Suitable Host ◽  
Parasitic Fungi ◽  
Germ Tubes ◽  
Gain Access

Respecting the various modes by which parasitic fungi gain access to the interior of the host-plant, much is known. De Bary (1) demonstrated that the germ-tubes of secidiospores and uredospores enter solely through the stomata, whereas germ-tubes of teleutospores, and also those of various other parasites, enter by piercing the walls of the epidermal cells, or of the guard-cells of the stomata. Other fungi gain an entrance sometimes by a stoma, sometimes by piercing the wall of an epidermal cell. The same author also observed that the zoospores of Cytopus and of Peronospora umbelliferarum , when deposited on the leaf of a suitable host-plant, germinate and the germ-tube enters a stoma, whereas when germination takes place in water the germ-tubes soon die. Marshall Ward has shown (2) that in the case of a species of Botrytis an entrance into the host-plant through the cell-walls of the epidermis is effected by means of the secretion of a ferment by the tip of the germ-tube, whereby the substance of the cell-wall is softened.

The role of primary germ tubes in the life cycle of Blumeria graminis: The primary germ tube is responsible for the suppression of resistance induction of a host plant cell

2007 ◽  
Vol 71 (4-6) ◽  
pp. 184-191 ◽  
Author(s):  
Naoto Yamaoka ◽  
Takayuki Ohta ◽  
Naoko Danno ◽  
Satoshi Taniguchi ◽  
Isao Matsumoto ◽  
...  
Keyword(s):  
Life Cycle ◽  
Host Plant ◽  
Plant Cell ◽  
Germ Tube ◽  
Blumeria Graminis ◽  
Resistance Induction ◽  
Germ Tubes

Mango: A new host plant for the lycaeinid Anthene lycaenina lycaenina (R. Felder, 1868)

ENTOMON ◽  
2020 ◽  
Vol 45 (3) ◽  
pp. 237-238
Author(s):  
J. Nayanathara ◽  
R. Narayana
Keyword(s):  
Host Plant ◽  
New Host ◽  
First Time

Anthene lycaenina lycaenina (R. Felder, 1868) is reported on mango for the first time.

The description of a new Bruchophagus species (Hymenoptera, Chalcidoidea, Eurytomidae) developing in seeds of Melilotus officinalis (L.) Descr. (Fabaceae) in Iran

2019 ◽  
Vol 16 (1) ◽  
pp. 12-15
Author(s):  
M.D. Zerova ◽  
A. Al-Sendi ◽  
V.N. Fursov ◽  
H. Adeli-Manesh ◽  
S.E. Sadeghi ◽  
...  
Keyword(s):  
New Species ◽  
Host Plant ◽  
Lotus Corniculatus ◽  
Lateral View ◽  
National Academy Of Sciences ◽  
Melilotus Officinalis ◽  
Biological Features ◽  
Academy Of Sciences

The new species, Bruchophagus ayadi sp.n., is reared from seed pods of Melilotus officinalis (L.) Desr. (Fabaceae) in Iran (Lorestan). The new species is close to B. platypterus (Walk.), but differs by roundish abdomen and very gibbous, almost globular (in lateral view) mesosoma. These species can be also differentiated by some biological features. The host plant of B. platypterus is Lotus corniculatus L., whereas the new species is reared from Melilotus officinalis (L.) Desr. Holotype of Bruchophagus ayadi sp.n. is deposited in the collection of I.I. Schmalhausen Institute of Zoology of National Academy of Sciences of Ukraine (Kyiv).

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