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United States Department of Agriculture

Agricultural Research Service

Research Highlights
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New in September, 2014 - Recent Publications, Grants AwardedHonors and Awards Received, Outreach, Non-technical ArticlesCritical and Emerging Issues


Recent Publications -


Mohammed, A. R., J. T. Cothren, J.T., Chen, M.-H., and L. Tarpley, L. 1-methylcyclopropene (1-MCP)-induced alteration in leaf photosynthetic rate, chlorophyll fluorescence, respiration and membrane damage increases rice (Oryza sativa L.) yield under high night temperature. Journal of Agronomy and Crop, DOI: 10.1111/jac.12096.


High night temperature (HNT) is recognized as a cause of yield loss in rice. The HNT is considered to trigger increased production of ethylene, a plant hormone, leading to oxidative stress, which results in yield loss. In this study, 1-methylcyclopropene (1-MCP), which blocks transduction of the ethylene signal, was examined for its ability to decrease the ethylene effect and help prevent yield and quality losses due to HNT of a popular hybrid rice of the Southern U.S. rice. Plants under HNT that were treated with 1-MCP performed better, i.e. had increased yield, which was associated with increased photosynthetic production, decreased respiration and membrane damage, and increased grains per seedhead. The findings further implicate the role of ethylene in HNT-stress induced rice yield losses, and suggest the possibility of 1-MCP application to minimize yield losses due to HNT in rice crops.

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Grants Awarded - none to report.


Special invited presentations given, or honors and awards received - none to report.


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Public Outreach/Stakeholder and Collaborator Contacts -

September 3, Dr. Yulin Jia consulted with Dr. Mujeebur Rahman Khan, Professor of Department of Plant Protection, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, India to serve as the foreign examiner for a dissertation of his PhD student. As per Academic Ordinances of the university, the Ph.D. thesis is evaluated by three experts, one from an advanced country (foreign examiner) and two within the country (Indian examiners).

September 8, Dr. Yulin Jia consulted with Dr. James Correll, Professor of Plant Pathology of University of Arkansas to host a discussion and tour with three rice pathologists, Chang-Hsin Kuo, National Chiayi University, Chung Wen-Hsin and Yicheng Chen from National Chung Hsing University, Taiwan.  Dr. Jia presented an update of ARS research on rice blast and sheath blight diseases, and ideas for collaboration subsequently led a tour the ARS facility.

September 10 and September 18, Dr. Yulin Jia consulted with Dr. Muthusamy Manoharan, Director of Regulatory Science Center, Associate Professor of Department of Agriculture, University of Arkansas - Pine Bluff (UA PB) to attend a thesis proposal of Mr. Suresh Pokhrel for his master of science as a member of thesis examining and supervising committee.  Before seminar, Dr. Jia also supervised blast inoculation and evaluation of rice materials at a UA Pine Bluff laboratory.

September 15, Dr. Yulin Jia consulted with John Ridenour, a graduate student of Department of Plant Pathology to meet with Dr. Richard Wilson, an Assistant Professor at the University of Nebraska.   Additional participants for discussions were Johnathon Smith, UA Plant pathology, Dr. Jeremy Edwards (ARS) and Dr. Yeshi Wamishe of University of Arkansas cooperative extension service, Stuttgart, AR.  Subsequently, Dr. Jia led a tour of Plant Pathology lab of DBNRRC.

September 15, Dr. Yulin Jia consulted with Dr. Mike Stout, professor of Louisiana State University for blast infection of adult plants during an investigation of the effect of blast infection on susceptibility of rice to fall armyworm. 

September 16, Dr. Anna McClung provided an overview of the research being conducted at the DBNRRC to a group of 6 representatives from the Federal Grain Inspection Service offices in Washington and Louisiana. A tour of the facility was provided with special stops in the grain chemistry, genomics, and germplasm evaluation laboratories.

September 22, Dr. Yulin Jia attended a qualification examination of a PhD candidate Felix Rotich of Department of Plant Pathology, University of Arkansas-Fayetteville with Dr. Yeshi Wamishe, University of Arkansas Cooperative Extension Service, and Dr. Klaus Scheuermann, a visiting scientist from Brazil.

During September, 800 rice accessions from the Genetics Stocks Oryza (GSOR) collection were distributed to researchers in the USA and Taiwan.

During the last 12 months  2,149 rice accessions were distributed through the NPGS (Aberdeen, ID) to such countries as Bhutan, Canada, Chile, China, France, India, Japan, South Korea, Netherlands, Pakistan, Philippines, Spain, Turkey, United Kingdom, and U.S.  Although the seed is distributed from the Idaho storage center, all rice accessions are rejuvenated and characterized at DBNRRC using summer or winter (in Lajas, Puerto Rico) nursery facilities.



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Write ups in lay media (local paper, Ag. Research magazine, etc.)


Three scientists were featured in the local newspaper, Stuttgart Daily Leader, in an ongoing series to introduce local scientists and highlight the facility’s research mission to the community.  Featured were Drs. Georgia Eizenga, Rolfe Bryant, and David Gealy.


September 15, Dr. Shannon Pinson was quoted in The New York Times article “Fighting Poisons with Bacteria”, which addresses current research with bacteria that can help lower the amount of arsenic in food products by reducing the amount of arsenic that crops uptake from the soil.


Critical or Emerging Issues - none to report



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For more information, please contact Anna McClung, Research Leader,

Last Modified: 10/7/2014
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