نتایج جستجو برای: papaya dieback in malaysia

تعداد نتایج: 16982005  

2010
Shyi-Dong Yeh Yi-Jung Kung Joseph A. J. Raja

The aphid-borne potyvirus, Papaya ringspot virus (PRSV), is the major limiting factor for papaya production worldwide. Transgenic resistance conferred by the PRSV-coat protein (CP) gene and based on the mechanism of post-transcriptional gene silencing (PTGS), has become the most effective method to protecting papaya from infection by the noxious virus. The PRSV-CP transgenic lines of cultivars ...

2014
NADEEM SHEIKH NEELAM YOUNAS TASLEEM AKHTAR

Thrombocytopenia is a disorder in which there is a thrombocyte count of less than 150×103/μL. Thrombocytopenia is life threatening in many diseases particularly in dengue which is an escalating problem in the world. There was an outbreak of dengue in 2011 in Lahore, Pakistan and it was public opinion that Carica papaya leaf extract helps in recovery of platelet count. The aim of present study w...

2010
Luke C. Devitt Kent Fanning Ralf G. Dietzgen Timothy A. Holton

The colour of papaya fruit flesh is determined largely by the presence of carotenoid pigments. Red-fleshed papaya fruit contain lycopene, whilst this pigment is absent from yellow-fleshed fruit. The conversion of lycopene (red) to beta-carotene (yellow) is catalysed by lycopene beta-cyclase. This present study describes the cloning and functional characterization of two different genes encoding...

2013
CHING S. THAM SRIKUMAR CHAKRAVARTHI NAGARAJA HALEAGRAHARA RANJIT DE ALWIS

Lead causes damage to the body by inducing oxidative stress. The sites of damage include the bone marrow, where marrow hypoplasia and osteosclerosis may be observed. Leaves of Carica papaya, which have antioxidant and haemopoietic properties, were tested against the effect of lead acetate in experimental rats. The rats were divided into 8 groups; control, lead acetate only, Carica papaya (50 mg...

2014
Decai Tuo Wentao Shen Yong Yang Pu Yan Xiaoying Li Peng Zhou

Papaya ringspot virus (PRSV), Papaya leaf distortion mosaic virus (PLDMV), and Papaya mosaic virus (PapMV) produce similar symptoms in papaya. Each threatens commercial production of papaya on Hainan Island, China. In this study, a multiplex reverse transcription PCR assay was developed to detect simultaneously these three viruses by screening combinations of mixed primer pairs and optimizing t...

Journal: :Annual review of phytopathology 1998
D Gonsalves

The papaya crop is severely affected by papaya ringspot virus (PSRV) worldwide. This review focuses on efforts to control the destructiveness of the disease caused by PSRV in Hawaii, starting from the use of cross protection to parasite-derived resistance with transgenic papaya expressing the PSRV coat protein gene. A chronology of the research effort is given and related to the development of ...

Journal: :Molecular biology and evolution 2012
Laura A Weingartner Richard C Moore

The sex chromosomes of the tropical crop papaya (Carica papaya) are evolutionarily young and consequently allow for the examination of evolutionary mechanisms that drive early sex chromosome divergence. We conducted a molecular population genetic analysis of four X/Y gene pairs from a collection of 45 wild papaya accessions. These population genetic analyses reveal striking differences in the p...

2016
Jingping Fang Aiting Lin Weijing Qiu Hanyang Cai Muhammad Umar Rukai Chen Ray Ming

Papaya is a productive and nutritious tropical fruit. Papaya Ringspot Virus (PRSV) is the most devastating pathogen threatening papaya production worldwide. Development of transgenic resistant varieties is the most effective strategy to control this disease. However, little is known about the genome-wide functional changes induced by particle bombardment transformation. We conducted transcripto...

2010
Taofeeq Oduola Ibrahim Bello Thomas Idowu Godwin Avwioro Ganiyu Adeosun Luqman Olatubosun

BACKGROUND Exposure of animals to xenobiotics may or may not trigger adverse response at cellular levels. Aqueous extract of unripe Carica papaya is consumed by sickle cell patients as antisickling agent in Western Nigeria. AIM This study was undertaken to investigate the effects of Carica papaya on certain organs in Wister albino rats exposed to aqueous extract of unripe Carica papaya. MAT...

2013
Md. Abul Kalam Azad Md. Golam Rabbani Latifah Amin Nik Marzuki Sidik

Transgenic papaya plants were regenerated from hypocotyls and immature zygotic embryo after cocultivation with Agrobacterium tumefaciens LBA-4404 carrying a binary plasmid vector system containing neomycin phosphotransferase (nptII) gene as the selectable marker and β-glucuronidase (GUS) as the reporter gene. The explants were co-cultivated with Agrobacterium tumefaciens on regeneration medium ...

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