Jintana Unartngam

Kasetsart University | KU · Department of Plan Pathology

Fusarium oxysporum f. sp. luffae (Folu) is a severe plant pathogen that causes vascular wilt and root rot in Luffa plants worldwide. A green fluorescent protein (GFP)-tagged isolate of Folu (Fomh16-GFP) was utilized to investigate the infection progress and colonization of Fomh16-GFP in resistant (LA140) and susceptible (LA100) Luffa genotypes. Sev...

Dirty panicle disease is one of the most important diseases that can cause yield losses in rice production. Despite the severity of the disease, the molecular basis of resistance to the pathogen is poorly understood. Using QTL-seq with an F2 population, we identified three genomic regions on chromosomes 1, 9, and 10, namely qDP1, qDP9, and qDP10. T...

Waxy maize (Zea mays L. var. ceratina) is a special type of maize characterized by a sticky texture when cooked, due to high amylopectin content in the endosperm. Waxy maize is popular in China and Southeast Asia for fresh consumption. Breeding strategies have been used to improve the quality of waxy maize, including hybrid breeding by crossing sup...

Four members of Fusarium solani species complex (FSSC), F. cucurbiticola, F. petroliphilum, F. falciforme and F. keratoplasticum, cause foot, crown, stem and fruit rot in cucurbits. Although previous studies revealed that F. cucurbiticola was the pathogen causing crown and fruit rot in Taiwan melons, these are unreliable in assessing FSSC infection...

Paramyrothecium eichhorniae sp. nov. was observed and collected from Chiang Mai and Phetchaburi Provinces, Thailand. This new species is introduced based on morphological and molecular evidence. This fungus is characterized by its production of sporodochium conidiomata with a white setose fringe surrounding an olivaceous green to dark green slimy m...

Rice is one of the main economic agriculture products of Thailand. One of factors which cause the decline in both quality and quantity of such product is the spreading of rice diseases which has Blight and Blast as main diseases. Fromthe report, both diseases can be infected and destroy rice from the sapling stage to the yield stage with the damage...

Rust fungi collected in Thailand in the past four decades were examined and identified. In this paper, we report seven species in three teleomorphic genera classified in Phakopsoraceae (Pucciniales) and four anamorphic species, whose taxonomic relationships to Phakopsoraceae are assumed. They are Cerotelium fici on Morus (Moraceae), Monosporidium m...

Rust fungi collected in Thailand in the past four decades were examined and identified. In this paper, we report eight species in seven teleomorphic genera and two anamorphic species in Pucciniales collected in Provinces of Chiang Mai and Mae Hong Son, northern Thailand: Hyalopsora polypodii on unidentified ferns, Pucciniastrum epilobii on Fuchsia...

Sweetness is an economically important quality characteristic for sweet corn breeding. The different types of sweet corn are caused by a single gene mutation [1]. The brittle2 and shrunken2 mutants accumulated 20% of the starch present in maize kernels [2, 3]. The mutation in ADP -glucose pyrophosphorylase turns out to be a key enzyme limiting the...

Hemileia gardeniae-floridae is an accepted name for a Cape jasmine (Gardenia jasminoides) rust fungus distributed in East Asia. The fungus name was based on uredinial anamorph collected in Taiwan in 1931. The fungus was rarely collected in Taiwan and southern Japan, and its telial stage remained unknown. Microscopic examination of the type material...

Rice dirty panicle disease is one of the most important problems in Thailand. The fungal pathogens were reported to be many species including Curvularia lunata, Bipolaris oryzae, Fusarium incarnatum, Sarocladium oryzae, Trichoconis padwickii and Cercospora oryzae. Biological control is an alternative method for controlling this disease and reducing...

Pucciniosira cornuta was discovered on Berberis nepaulensis at Doi Suthep-Pui National Park, Chiang Mai Province, Thailand. The fungus is characterized by narrow columnar, peridiate telia composed of catenulate, two-celled teliospores. This paper describes detailed sorus and spore morphology of this fungus, that were not previously reported, and li...

Goplana dioscoreae and Phakopsora dioscoreae were found in Thailand. Goplana dioscoreae occurs on Dioscorea bulbifera at Doi Suthep, Chaing Mai Prov., D. wallichii at Takua Pa, Phang Nga Prov., and unidentified Dioscorea plants at Doi Suthep, Chiang Mai Prov. and Thap Satae, Prachuap Khiri Khan Prov. Phakopsora dioscoreae occurs on D. aff. alata, D...

Rust fungi collected in Thailand in the past three decades were examined and identified. In this paper, we report seven Puccinia species: P. austroyunnanica on Gouania aff. leptostachya (Rhamnaceae) in Nakhon Ratchasima Prov.; P. costina on Cheilocostus speciosus (Costaceae) in Chiang Mai Prov.; P. curculigonis on Curculigo aff. orchioides (Hypoxid...

Two rare chaconiaceous rust fungi were newly found in Chiang Mai Province, Thailand. Chaconia butleri occurs on a new host plant, Jasminum syringifolia, at Mae Rim. This fungus is unique in producing urediniospores ornamented with longitudinal rows of interconnected rods or ridges. It has been reported on ve Jasminum species in India and China. Chr...

Rust fungi on commercial Vitis cultivars, wild Vitaceae, and Meliosma (Sabiaceae), potential alternate hosts of a grapevine leaf rust (GLR) fungus, were surveyed in Thailand and Vietnam. Molecular phylogenetic analyses using the internal transcribed spacer 2 and the large-subunit rRNA gene (D1/D2 region) and morphological examinations confirmed tha...

A rust fungus was found on leaves of Antheroporum glaucum (Fabaceae, Faboideae) in Provinces of Petchaburi and Ratchaburi, western Thailand. No rust fungus was previously reported on this legume tree species. The new rust fungus was apparently microcyclic, producing telia surrounding dense aggregates of spermogonia, on the abaxial leaf surface. Tel...

Three poorly known species of Ravenelia with limited geographic distribution and one widespread species parasitizing leguminous trees (Fabaceae) were newly found in Thailand. Ravenelia odoratissimae occurred on Albizia odoratissima; R. ornata on Abrus pulchellus, Ab. precatorius, and Abrus sp.; R. parasnathii on Acacia comosa and an unidentified Ac...

A new rust fungus was found on Lygodium flexuosum at Doi Suthep-Pui National Park in Chiang Mai Province, Thailand. Puccinia lygodii was the only rust fungus currently known on Lygodium spp. (Lygodioideae, Schizaeaceae, Schizaeales) from southern North America through northern South America. The new fungus produced uredinia linearly between veins,...

Pythium sp. was isolated from the roots, crowns and rhizosphere soil of Catharanthus roseus (L.) G. Don. (common name; vinca) showing symptoms of root and crown rot disease in plantation areas in Chiang Mai Thailand. The pathogen was studied by morphological and molecular analysis based on internal transcribed spacer (ITS) sequence. The Pythium iso...

Chromatographic separation of extracts from the fungal biomass of a plant pathogenic fungus, Myrothecium roridum, yielded 8 trichothecene toxins including 6 type D trichothecenes (1–6) and 2 type A trichothecenes (7–8). 6′,12′-Epoxymyrotoxin A (1) and 7′-hydroxymytoxin B (2) were new macrocyclic trichothecenes, while the other trichothecenes were i...

In Thailand, corn downy mildews are reported to cause by six species of fungi including Peronosclerospora sorghi, P. philippinensis, P. sacchari, P. spontanea, Sclerophthora rayssiae var. zeae and P. maydis. The fungal species of corn downy mildew distributed in different geographic areas of Thailand based on morphological and molecular identificat...

Fusarium species have been reported as causal agents of various plant diseases such as vascular wilt, root, stem, collar rot, and damping off of seedlings. The present study was conducted to evaluate the diversity of Fusarium species based on morphological characteristics and ISSR markers. Twenty four isolates of Fusarium were isolated from differe...

Five Phakopsora species form the Aecidium state on plants of the genus Meliosma (Meliosmaceae) in temperate Asia; three are heteroecious with uredinial and telial stages on plants of the family Vitaceae and the two others are autoecious with all stages on Meliosma plants. Three unconnected Aecidium species occur on Meliosma plants in subtropical an...

Three distinct groups were revealed among the grapevine leaf rust fungi from Japan, Taiwan, Thailand, Malaysia, Indonesia, East Timor and Australia in phylograms generated from sequence analyses of the internal transcribed spacer 2 and the large-subunit rRNA gene (D1/D2 region). A group of Thai, Malaysian-Indonesian and East Timorese-Australian fun...

A rust fungus found in Japan on Rhododendron kaempferi, R. kiusianum, and R. dauricum has previously been identified as Chrysomyxa rhododendri. Light and scanning electron microscopy of fresh and herbarium materials of the rust fungus, however, show that the spore surface morphology differs from the urediniospores of C. rhododendri, and the spores...

Ten species of rust fungi (Crossopsora 2, Maravalia 1, Pileolaria 1, Puccinia 1, Ravenelia 1, Sphaerophragmium 1, Uredo 2, and Uromyces 1) are newly recorded together with six new host plants in Thailand.

Puccinia dioicae var. micropuncta and P. caricis-stipatae complete their life cycle by host-alternating between Artemisia (spermogonial-aecial stage) and Carex (uredinial-telial stage). These species are suggested to be biologically distinct by inoculation experiments and field observations. Two additional Puccinia ferruginosa and P. artemisiae-kei...

Coleosporium plumeriae Pat. is a rust fungus (Melampsoraceae) found on Plumeria species. The disease is characterized by the formation of powdery, bright yellow-orange, erumpent, hypophyllous, punctiform uredinia on the abaxial portion of the leaf. The spermagonial and aecial states are unknown. Urediniospores are subglobose to angular, catenulate,...

Jintana Unartngam, Pattama Janruang and Chaiwat To-anan(2011) Genetic diversity of Puccinia polysora in Thailand based on inter simple sequence repeat (ISSR) markers analysis. Journal of Agricultural Technology 7(4):1125-1137. Corn rust fungi are considered as major pathogens in corn production of Thailand. Two corn rust species, Puccinia polysora...

Thesis (Ph. D. in Agricultural Science)--University of Tsukuba, (A), no. 3749, 2005.3.25 Includes bibliographical references