University of Hawai‘i at Manoa
Skip Breadcrumb

Last updated on Wednesday, January 7, 2009     Make updates ->

John  Hu

Name :

John Hu

Title :

Plant Pathologist

Unit :

Department of Plant & Environmental Protection Sciences

Address :

3190 Maile Way
                    Honolulu, HI 96822

Room :

St. John 310C

Phone :


Fax :


E-mail :

Specialties :

Plant Virology: Pineapples-Virus ManagementBananas-Virus ManagementOrchids in gen.-Virus Management

Professional Prep/Appointments :

The first middle school of Xuzhou, China B.S. Nanjing Agriculture University, China M.S. Cornell University Ph.D Cornell University

Research Interests :

  • Banana bunchy top virus (BBTV) is the most devastating virus disease of bananas. The virus is transmitted by the banana aphid (Pentalonia nigronervosa) in a persistent manner. New growth from infected plants is stunted and distorted, resulting in a characteristic "bunchy top" appearance. No fruit is produced on infected plants, and a high incidence of BBTV in production areas can cause complete yield loss. Specific objectives of this project are: (1) to develop rapid, sensitive, and reliable assays for detection of BBTV in plants and insects; (2) to characterize the genome organization and vector transmission of BBTV; and (3) to develop resistant transgenic banana plants to control BBTV.
  • Mealybug wilt of pineapple (MWP) is a devastating disease found in all the pineapple-growing regions of the world. The disease is characterized by severe leaf tip dieback, downward curling of the leaf margins, and reddening and wilting of the leaves that can lead to total collapse of the plant. Specific objectives of this project include: (1) to develop rapid detection assays for the closterovirus; (2) to study the cause (etiology) of MWP; (3) to examine the epidemiology of the virus; and (4) to develop alternative, environmentally sound strategies to manage MWP.
  • Citrus tristeza virus (CTV) is a major factor limiting citrus production throughout the world. In many citrus-growing regions, CTV has been responsible for the loss of millions of mature trees at a cost of billions of dollars. CTV is transmitted most efficiently by the brown citrus aphid (BrCA). Specific objectives of this project include: (1) to study the incidence and distribution of CTV strains in Hawaii; (2) to select potential candidate CTV strains for use in cross-protection; (3) to produce CTV-resistant citrus trees using pathogen-derived resistance approaches.

Selected Recent Publications :

  • Tichaona Mangwende, T., Wang, M.-L., Borth, W., Hu, J.S., Moore, P. H., Mirkov, T. E., Albert, H. H. (2008) The P0 gene of Sugarcane yellow leaf virus encodes an RNA silencing suppressor with novel activities. Virology (in press)
  • Jiang, B., Hong, N., Wang, G.P., Hu, J.S., Zhang, J.K., Wang, C.X., Liu, Y., Fan, X.D. 2008.Characterization of Citrus tristeza virus strains from southern China based on analysis of restriction patterns and sequences of their coat protein genes. Virus Genes 37:185-192.
  • Kamo, K., Jordan, R.L., Hsu, H-T., and Hu, J.S. 2008. Antibodies in plants. Floriculture, Ornamental and Plant Biotechnology. 5:311-318.
  • Melzer, M.J., Sether, D.M., Karasev, A.V., Borth, W., and Hu, J.S. 2008. Complete nucleotide sequence and genome organization of Pineapple mealybug wilt-associated virus-1. Arch. Virol. 153:707-714.
  • Sether, D. M., Melzer, M.J., Borth, W.B., and Hu, J.S.2008.Genome organization and phylogenetic relationship of Pineapple mealybug wilt associated virus-3 with other family Closteroviridae members.Virus Genes (in press)

Languages :