Navigation Links
Does hotter mean healthier?
Date:2/3/2009

LAS CRUCES, NMPhytophthora blight, caused by Phytophthora capsici, is a major plant disease that affects many crop species worldwide, including chile peppers in New Mexico. Farmers' observations suggested that Phytophthora capsici caused less damage in pepper crops of the hot pepper varieties than low-heat pepper varieties.

A study published in the October 2008 issue of HortScience by the research team of Mohammed B. Tahboub (postdoctoral researcher), Soumaila Sanogo (plant pathologist and team leader), Paul W. Bosland (chile pepper breeder), and Leigh Murray (statistician) set out to determine whether or not the severity of Phytophthora blight would be greater in low-heat than in hot chile peppers.

The most effective means for controlling Phytophthora blight are chile pepper cultivars that are genetically resistant to the disease. Some resistant lines have been identified, but currently there are no cultivars that are resistant to the blight in all environments.

Chile pepper fruit become infected during prolonged periods of heavy rain and high humidity in flooded and poorly drained fields. Prior to this study, there had been no systematic assessment of the relationship of chile pepper heat level to chile pepper response to Phytophthora capsici. If such a connection could be found, information might have been revealed that would assist breeding programs intended for developing disease-resistant cultivars of pepper.

Based on documented field observations in New Mexico, Arizona, and South Carolina, the researchers hypothesized that peppers that produce high-heat fruits would be more resistant to Phytophthora blight than low-heat varieties. The study was conducted by observing infection on both the root and fruit of different varieties of peppers included.

The results of the study concluded, however, that there was no relationship between the heat level of the pepper and the plant's resistance to Phytophthora blight. For example, while the disease was slowest to develop on the roots of one variety of jalapeo, it was quickest to develop on the fruit of the same plant.

Conversely, the disease was faster to develop on roots and slower on fruit of all other cultivars. As the root of the plant contains no heat-inducing agents but the fruit does, the slow development on the root and rapid development on the fruit of the jalapeo indicates that heat level is not a factor.

The results of this study indicate that factors other than heat level may be involved in fruit response to Phytophthora capsici. Genetic differences and cuticle thickness of the plants and fruits are among other issues that could be relevant, but further study is warranted.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Does hotter mean healthier?
(Date:2/28/2017)... 2017   Acuant , a leading provider of ... enhancements to new and core technologies building upon the ... mobile and desktop Acuant FRM TM facial recognition ... real time manual review of identity documents by accredited ... fastest and most accurate capture software to streamline workflows ...
(Date:2/27/2017)... , Feb. 27, 2017   Strategic Cyber ... announced it has led a $3.5 million investment in  ... platform. Strategic Cyber Ventures is DC based and is ... Hank Thomas . Ron Gula , also ... Ventures, also participated in this series A round of ...
(Date:2/22/2017)... Feb. 22, 2017 With the biometrics ... Research identifies four technologies that innovative and agile ... significant share in the changing competitive landscape: multifactor ... authentication.   "Companies can no longer ... security," says Dimitrios Pavlakis , Industry Analyst ...
Breaking Biology News(10 mins):
(Date:3/22/2017)... ... March 21, 2017 , ... Proper glycosylation ... on the desired increase and/or decrease in antibody-dependent cellular cytotoxicity or complement-dependent cytotoxicity, ... of therapeutic antibodies. , To meet this demand, the team at SCIEX ...
(Date:3/22/2017)... , ... March 21, 2017 , ... The Conference Forum ... (CMO Summit) to be held on May 10-11, 2017, at the Colonnade Hotel in ... specifically for Chief Medical Officer peer-to-peer learning, benchmarking and support. , “The Chief Medical ...
(Date:3/22/2017)... ... 2017 , ... The Society for Immunotherapy of Cancer (SITC) strongly opposes the ... published fiscal year 2018 budget request. , This proposal calls for ... or roughly 20% of its total budget. If applied proportionally across NIH, funding for ...
(Date:3/22/2017)... , March 22, 2017  Personal Genome ... its cancer testing contract with the U.S. Department ... tumor profiling assay with the company,s new CancerSELECT ... comprehensive, clinically actionable pan-cancer profiling test that includes ... assess potential patient response to checkpoint inhibitor immunotherapies. ...
Breaking Biology Technology: