Management”G Programs have
been developed for the integrated control of major fungal,
bacterial and nematode diseases of various crops around Taiwan,
with special emphasis on the incorporation of soil amendments
and the integration of chemical, biological and resistant
crop strategies. The SH, LT-M, and FBN-5A mixtures formulated
in the Department have been shown as effective soil amendments
in improving plant growth and reducing incidence of various
soilborne plant diseases. In addition, a plant nutrient formulation
developed by the Department faculty, CH100, has been shown
to be effective in the control of Chinese leek rust, Japanese
apricot scab, and plum powdery mildew. The success of these
formulations has earned the Department a solid international
and national reputation. Development and application of ”§Expert
Consultation System”Ø for the diagnosis and management of important
plant diseases is a recent addition to this area of research.
and Taxonomy ”GResearches include
the investigation of species and genetic diversities, identification
and taxonomy of fungi, bacteria, nematodes, viruses, or phytoplasma,
development of biochips or gene-chips for molecular diagnostics
of plant pathogens including bacteria, fungi, nematodes and
Virology”GResearches include the identification
of virus diseases, the production of monoclonal and polyclonal
antisera for virus detection or characterization, the development
and application of mild strain or defected viral genome for
the protection of major crops from natural viral infection,
the establishment of a tissue culture system and a clean seed
program to prevent disease dissemination, development of broad-spectrum
and specific tools for diagnosis of important plant viruses,
and exploitation of virus-induced gene silencing system(VIGS)
for plant functional genomics. Major accomplishments of molecular
studies on important plant viruses include the elucidation
of the complete genomic nucleotide sequence, the determination
of the genetic map, and the generation of the infectious in
vitro transcript of papaya ringspot virus (PRSV). Several
PRSV mild mutants that caused symptomless infection were developed.
These mild mutants have been used in large-scale applications
of conventional cross protection for PRSV control in Taiwan
for over ten years. The research toward controlling PRSV has
been upgraded by the use of recombinant DNA techniques, transgenic
approaches, and the expression of foreign genes by virus vectors.
Coat-protein transgenic papaya lines have been generated and
proved to be highly resistant to infection by PRSV under field
Plant Pathology”G Research topics
include the determination of the role of pathogen-produced
toxins, enzymes, and phytohormones in disease development;
the water relation of diseased plants with wilting symptoms;
the influence of disease on photosynthetic and respiratory
activities of host plants, molecular basis of necrotic symptom
development with emphasis on the involvement of activated
oxygens and NO free radicals, signal transduction relating
to defence gene expression, and the biotic or abiotic factors
contributing to the elicitation of the resistance response
of host plants. The physiological disorders caused by air
pollutants are also actively researched.
and Epidemiology ”GStudies are centered
on the biology and ecology of microbial pathogens on or around
the infection court and their correlation with the incidence
of diseases on various vegetable, fruit, and ornamental crops
determining. Research is focused on the factors that lead
to the suppressiveness or conduciveness of disease development.
and Molecular Biology ”GResearch interests
include analyses of the sexual and asexual propagating behavior
of fungal or bacterial plant pathogens; isolation, cloning
and transferring of specific genes among different pathogens
including viruses; analyses of the expression of genes involved
in virulence; the engineering of antagonistic microbial organisms
for disease control; isolation and expression analysis of
resistance-related genes for plant diseases.
Biotechnology and Industrial Application”G Major
research focuses are aimed for the development of biorational
microbial products for plant production. Actively researched
topics include the screening and exploitation of useful microbial
resources native in Taiwan, establishment of the mass production
and formulation biotechniques, elucidation of the mode of
action of disease control efficacy, formulation improvement
for better efficacy and shelf-life, and the cloning and genetic
engineering of the antagonistic genes for crop improvement.
A liquid fermentation pilot plant equipped with sophisticated
production and processing facilities was established for the
intended research and student expertise training (including
on-job training for personnels of cooperated biotech industries).
A photodynamic biocide patent was developed during the past
decade; the know-how has been successfully transferred to
private industry and registered as the first biorational fungicide
of the country. With the aid of the pilot plant core facility,
the success of microbial biopesticide development has earned
the Department a reputation as the center of microbial biopesticide
research and development in Taiwan.
of Natural Resources”G Researches
include the breeding and the physiological aspects on the
commercially cultivated mushrooms; utilization of agricultural
wastes for controlling plant diseases; using medicinal plant
materials as an alternative strategy in sustainable agriculture
for plant health.
Integrated management of Root Diseases of Vegetables”G
The study include grafting control of Fusarium wilt of bitter
gourd, integrated disease management of soft rot of ginger
by yield increasing bacteria and management of root diseases
of vegetables under structure. The results indicated that
using clean seeds and cultural substrate, employing bitter
gourd seedling from seed, instead of shoot, as scion to be
cleft-grafted or cleft-inarched on loofah to produce graft
seedlings growing at 20¢J are the selected methods highly recommended.
The growth of the grafts in the field several years has resulted
in gradual disappearance of Fusarium wilt and the better yields
of bitter gourd reached 80-100 t/ha, as compared to the average
yield of 16 t/ha for the non-grafted bitter gourd in Taiwan.
This study was earned an Outstanding Agriculture Research
Award issued by Council of Agriculture
Ž ”¹The Departmental
goals are to offer superior education in plant pathology and
plant-microbe interactions and to broaden the perspectives
of plant biology in undergraduate, and graduate education.
Ž ”¹The Department will continue to develop new and innovative
ways, such as biopesticides and disease-resistant transgenic
plants, to keep plants health and maintain food safety.
Ž ”¹ The Department will establish a Plant Quarantine Education
Center for offering national and international teaching, and
extension activities about plant protection.
Ž ”¹The departmental research, teaching, and extension programs
will continue to be cooperative efforts with other Departments
and industry nationally and internationally.