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:2/2/2016)... 2016  Based on its recent analysis of ... US-based Intelligent Retinal Imaging Systems (IRIS) with the ... New Product Innovation. IRIS, a prominent cloud-based retinal ... , is poised to set the new ... market. The IRIS technology presents superior price-performance value ...
(Date:1/28/2016)... Synaptics (NASDAQ: SYNA ), a leading developer of ... ended December 31, 2015. --> ... increased 2 percent compared to the comparable quarter last year to ... was $35.0 million, or $0.93 per diluted share. ... first quarter of fiscal 2016 grew 9 percent over the prior ...
(Date:1/22/2016)... January 22, 2016 ... addition of the  "Global Behavioral Biometric ... --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has ... Behavioral Biometric Market 2016-2020"  report to ... and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... , Feb. 4, 2016 Sinovac Biotech ... a leading provider of biopharmaceutical products in ... of its board of directors received on February 4, ... 2016, from a consortium comprised of PKU V-Ming ( ... Biomedicine Co., Ltd., CICC Qianhai Development ( Shenzhen ...
(Date:2/3/2016)... Pa. , Feb. 3, 2016  Discovery ... company focused on developing aerosolized KL4 surfactant therapies ... of Directors has approved an inducement award as ... Fraser , its newly appointed President and Chief ... Board,s Compensation Committee on February 1, 2016 and ...
(Date:2/3/2016)... Colorado (PRWEB) , ... February 03, 2016 , ... ... hospitals, has established a new office dedicated to the North American healthcare market. ... turnkey solutions to healthcare facilities. The company will provide new pneumatic tube ...
(Date:2/3/2016)... PALO ALTO, Calif. , Feb. 3, 2016 /PRNewswire/ ... the sale of AlphaImpactRx , a leading provider ... consumer health companies to IMS Health , a ... industry. AlphaImpactRx,s complementary offerings, capabilities and technologies will be ... the company,s growing global primary market research capabilities. ...
Breaking Biology Technology: