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Articles 31 - 44 of 44
Full-Text Articles in Pathogenic Microbiology
Host Pathogen Interactions: Is Arabidopsis Thaliana Remembered By Its Nemesis Pseudomonas Syringae?, Daniel Z. Kreiser
Host Pathogen Interactions: Is Arabidopsis Thaliana Remembered By Its Nemesis Pseudomonas Syringae?, Daniel Z. Kreiser
Lawrence University Honors Projects
Plants contain innate immune systems that deter pathogen infection. Pattern recognition receptors bind microbe-associated molecular patterns (MAMPs), triggering immunity. MAMPs are proteins exclusive to pathogens that are typically indispensable for their survival. For this reason, MAMPs cannot be mutated or removed without causing pathogen death. However, this does not necessitate constitutive expression of MAMPs. In this study, the MAMP response of Arabidopsis thaliana was utilized to determine differential detection of MAMPs expressed by Pseudomonas syringe pv. tomato DC3000 when pretreated with A. thaliana. Results demonstrated that more MAMPs are detected when P. syringae had previously encountered A. thaliana, …
Morphological, Anatomical And Molecular Investigation Into Witches’ Broom Disease Of Mamejvo (Enicostemma Axillare), K. Abirami, Anjali Sharma, Jatindra Nath Samanta, V. S. Rana, Kunal Mandal
Morphological, Anatomical And Molecular Investigation Into Witches’ Broom Disease Of Mamejvo (Enicostemma Axillare), K. Abirami, Anjali Sharma, Jatindra Nath Samanta, V. S. Rana, Kunal Mandal
Kunal Mandal
Mamejvo (Enicostemma axillare Raynal) is a perennial herb with diversified health benefits. It was found to be affected by a witches’ broom disease under the field conditions at Anand, Gujarat, India. Affected plants were 53.33% reduced in height due to shortened internodes, leading to typical witches’ broom symptoms. Flower size was reduced significantly in the affected plants compared with the healthy ones and their petal color gradually turned green (virescence). Affected plants produced 2.5 times more dry herbage than the normal plants but with less active ingredient (swertiamarin). Symptomatic plants died early while root suckers from such plants failed to …
First Report Of Hog-Plum (Spondias Pinnata) Leaf Spot Disease, Kunal Mandal
First Report Of Hog-Plum (Spondias Pinnata) Leaf Spot Disease, Kunal Mandal
Kunal Mandal
Hog–plum is a tree species with edible fruits. The plant is naturally distributed in the tropical areas of the Indian subcontinent. Our effort to introduce it in the semi– arid conditions of western India failed as the plants developed severe shot–hole type leaf spot symptoms. Association of a fungus with the disease was detected and its pathogenicity was established. The pathogen was identified to the genus level (Colletotrichum) based on the morphological and molecular markers.
Gata-Family Transcription Factors In Magnaporthe Oryzae, Cristian F. Quispe
Gata-Family Transcription Factors In Magnaporthe Oryzae, Cristian F. Quispe
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
The filamentous fungus, Magnaporthe oryzae, responsible for blast rice disease, destroys around 10-30% of the rice crop annually. Infection begins when the specialized infection structure, the appressorium, generates enormous internal turgor pressure through the accumulation of glycerol. This turgor acts on a penetration peg emerging at the base of the cell, causing it to breach the leaf surface allowing its infection.
The enzyme trehalose-6- phosphate synthase (Tps1) is a central regulator of the transition from appressorium development to infectious hyphal growth. In the first chapter we show that initiation of rice blast disease requires a regulatory mechanism involving an …
First Report Of Sweet Wormwood Leaf Blight Disease In India, Kunal Mandal
First Report Of Sweet Wormwood Leaf Blight Disease In India, Kunal Mandal
Kunal Mandal
Artemisia annua is an important drug plant yielding antimalarial compounds. It was found to be infected by Alternaria alternata in India. The pathogen reduces active leaf area and is also known to produce mycotoxins. Hence, the disease demands serious attention to ensure the availability of a safe drug.
Letter From The Dean, Lalit Verma
Letter From The Dean, Lalit Verma
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
First Report Of Downy Mildew On Lepidium Sativum In India, Kunal Mandal
First Report Of Downy Mildew On Lepidium Sativum In India, Kunal Mandal
Kunal Mandal
Downy mildew caused by Hyaloperonospora parasitica on different members of Brassicaceae has been reported from different parts of the world. In India, the pathogen is recorded for the first time on Lepidium sativum. Proper management strategies need to be formulated against this disease as incidence is increasing.
Root Rot Of Subterranean Clover In W.A, G C. Macnish, M. J. Barbetti, D. Gillespie, K. Hawley
Root Rot Of Subterranean Clover In W.A, G C. Macnish, M. J. Barbetti, D. Gillespie, K. Hawley
Journal of the Department of Agriculture, Western Australia, Series 4
Root rot of subterranean clover has occurred sporadically in the south west of Western Australia for a number of years.
In most seasons the disease has affected the clover paddocks of only a few farms, but in 1973 there was widespread pasture decline due to root rot in the South-West and south coastal districts.
At present the most promising approaches for minimising the effect of root rot appear to be the use of cultivation techniques and eventually the use of resistant varieties, or other pasture species.
Lupinosis, M R. Gardiner
Lupinosis, M R. Gardiner
Journal of the Department of Agriculture, Western Australia, Series 4
In spite of many years of intensive investigation lupinosis remains a remarkably complex and baffling problem. Current research is throwing new light on the disease and it is now much better understood— although far from beaten.
Lupinosis research is co-ordinated by the Department of Agriculture's Lupinosis Committee, on which are represented all groups working on the disease. These include veterinary surgeons and pathologists, chemists, plant pathologists and animal husbandry specialists.
Chairman of the Committee is Dr M. R. Gardiner, Chief of the Department's Animal Division and a veteran of lupinosis research.
In this article Dr Gardiner summarises the current state …
Phomopsis : The Causal Fungus Of Lupinosis, P Mcr Wood, A. G. P. Brown
Phomopsis : The Causal Fungus Of Lupinosis, P Mcr Wood, A. G. P. Brown
Journal of the Department of Agriculture, Western Australia, Series 4
It is now well known that lupinosis of sheep and cattle follows ingestion of lupin stubble colonised by the fungus Phomopsis rossiana. The fungus infects green lupins but persists on the stubble and under certain conditions apparently produces a toxin which causes the disease.
As Phomopsis is now widespread on lupins in Western Australia its ecology has been studied in detail as a basis for possible control measures.
This article outlines what is known so far of the disease and its control.
Sturt Pea Hosts Collar Rot Fungus, M D. Marcley
Sturt Pea Hosts Collar Rot Fungus, M D. Marcley
Journal of the Department of Agriculture, Western Australia, Series 4
Evidence that Western Australia's Sturt Pea can be attacked by collar rot fungus suggests a reason for the occurrence of collar rot in places where the fungus should not survive.
At Carnarvon for instance, in spite of the hot, dry conditions, the collar rot fungus has been found on eggplants and Tuart trees.
Pressurised Soil Fumigation Equipment For Control Of Eelworm, C W. Robartson
Pressurised Soil Fumigation Equipment For Control Of Eelworm, C W. Robartson
Journal of the Department of Agriculture, Western Australia, Series 4
THE treatment of soil infested with eelworms involves the use of chemical fumigants usually in the form of volatile liquids.
This article gives details for the construction of a simple pressurised fumigator which could be easily made by most orchardists, vignerons and market gardeners.
Sclerotinia Rot Of Vegetables, S C. Chambers, M. Hardie
Sclerotinia Rot Of Vegetables, S C. Chambers, M. Hardie
Journal of the Department of Agriculture, Western Australia, Series 4
SCLEROTINIA ROT, caused by the fungus Sclerotinia sclerotiorum, is now one of the most serious vegetable diseases in metropolitan market gardens.
Over the past decade it has been steadily increasing in prevalence and if present trends continue, many growers may be forced to abandon certain crops.
Although most vegetables are susceptible, the greatest losses are occurring in the autumn planting of beans, cauliflowers and lettuce and in the production of cauliflower seed.
Sclerotinia Rot Of Beans, S C. Chambers, M. Hardie
Sclerotinia Rot Of Beans, S C. Chambers, M. Hardie
Journal of the Department of Agriculture, Western Australia, Series 4
INVESTIGATIONS over the past three years suggest trenching is the most important practice for controlling Sclerotinia rot in market gardens.
None of the remaining measures under test gave satisfactory control of the disease, although some reduced its incidence significantly.