Navigation Links
Wine vine: Microscopic photography reveals bacteria destroying grape plant cell wall
Date:3/14/2010

y-winged sharpshooter.

The bacteria that causes Pierce's Disease, Xylella fastidiosa, colonizes a plant over a period of time causing it to weaken and die.

"It can be a matter of a few years or more quickly, but plants tend to stop producing before they die, so growers will pull them out of a vineyard," Cobb said.

Cobb and his team of researchers zeroed in on the "matchstick" effect of Pierce's Disease. Plants suffering from the disease drop their leaves, but the petiole - or stem that connects a leaf to the vine - remains, resembling a matchstick. This occurs over the length of the vine no matter where the initial insect injection occurred, Cobb explained.

"We've been looking at that area because we think that is a very important indicator of Pierce's Disease, but it also indicates that something is going on there," he explained.

The xylem of a plant is like a pipe with a spring in it which transports nourishing water to various parts of the plant. The bacteria that causes Pierce's Disease, Xylella fastidiosa, moves through the plant in this way.

"What is happening is that the bacteria is actually able to degrade and move through these very thin parts of the cell wall between the xylem elements," Cobb said. "You can actually see them in the 'pit membranes' that are the borders between adjacent cell walls."

The researchers focused the electron microscope at 100,000th of a millimeter along the pit membrane. The membrane normally blocks larger particles from passing through the pits that are located in the xylem, but high-level photographs show the bacteria breaking down the membrane in order to get through the plant.

Cobb said the study examined syrah and cabernet sauvignon plants because they have been known to be impacted by Pierce's Disease. In the field, they selected leaves that were still viable but had some "scorching" or water stress which indicated the disease was pres
'/>"/>

Contact: Kathleen Phillips
ka-phillips@tamu.edu
979-845-2872
Texas A&M AgriLife Communications
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Smithsonian scientists working to save microscopic threatened species
2. Fine print: New technique allows fast printing of microscopic electronics
3. Coating copies microscopic biological surfaces
4. Microscopic morphology adds to the scorpion family tree
5. Mighty diatoms: Global climate feedback from microscopic algae
6. Michigan State University study sheds light on microscopic flower petal ridges
7. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
8. Structure of 450 million year old protein reveals evolutions steps
9. Neural stem cell study reveals mechanism that may play role in cancer
10. New method reveals substances on surfaces of any kind
11. Study reveals predation-evolution link
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Wine vine: Microscopic photography reveals bacteria destroying grape plant cell wall
(Date:12/24/2014)... in December 2014, the 1U™ app has helped ... remember their usernames and passwords through replacing the antiquated system ... people who have struggled to remember usernames and passwords, ... on redefining identity, announced today that it is offering the ...
(Date:12/22/2014)...  The 2014 Holiday Season may be the brightest ever ... that the long anticipated floodgates for consumer biometrics may ... smart phones, tablets, and wearable mobile devices that incorporate ... users with nearly 4.8 billion biometric devices by 2020.   ...
(Date:12/19/2014)... Dec. 18, 2014  23andMe, Inc., the leading personal genetics company, ... differences in genetic ancestry of individuals from across ... arrived more than four hundred years ago, the ... for peoples from different continents. This study illuminates how American ...
Breaking Biology News(10 mins):1U Offers Best Solution to the Username / Password Dilemma: For FREE! 21U Offers Best Solution to the Username / Password Dilemma: For FREE! 3First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 223andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4
... pioneer on synthetic biology who has engineered microbial "factories" ... drug and biofuel substitutes for gasoline, diesel and jet ... presented by the Heinz Family Foundation and carries with ... multiple titles, Keasling is the Associate Laboratory Director for ...
... research indicates marijuana-like compounds called endocannabinoids alter genes and ... placenta during pregnancy and may contribute to pregnancy complications ... edition of The Journal of Biological Chemistry ... lipid molecules produced by the body disrupts the movement ...
... A team of Australian researchers, led by University of Melbourne ... the risk of developing Autism Spectrum Disorder, ASD. Lead ... Engineering at the University of Melbourne said the test could ... "This test could assist in the early detection of ...
Cached Biology News:Jay Keasling wins Heinz Award 2Jay Keasling wins Heinz Award 3Jay Keasling wins Heinz Award 4Study implicates marijuana use in pregnancy problems 2Genetic test predicts risk for Autism 2
(Date:1/22/2015)... today announces the firm brokered a long-term lease totaling 202,492 ... company, at Two Ledgemont Center in Lexington, Massachusetts ... and Brian Cohen , senior vice president, represented Shire ... Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... The laboratory information management systems market ... number of technological advancements due to factors such as ... to integrate healthcare systems, and increasing government support for ... integration. Key players in the market focus on technological ...
(Date:1/22/2015)... zFlo Motion , a US leader in ... product from a new partner. STT-Systems has developed ... 15 years, with offerings in the optical-motion capture, 3D scanning, ... (inertial measurement unit), iSen, is opening eyes around the world. ...
(Date:1/22/2015)... Diagenode, Inc., a leading global ... and complete solutions for epigenetics research, recently launched ... the need for manual processing. The new ChIPettor ... of histones or transcription factors and a semi-automated ...
Breaking Biology Technology:Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 2Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 3Laboratory Information Management Systems Market is Expected to Reach $1,323.6 Million by 2019 - New Research Report by MarketsandMarkets 43D Motion Capture Just Got Easy 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2
... - Covance Inc. has promoted Wendel Barr to the ... Anthony Cork to the position of president, early development, ... move supports the regional decision-making employed by its clients ... Tony have become corporate senior vice presidents and also ...
... Plan of New Jersey and announced an investment to ... Insurance Corp., Delta Dental Plan of Michigan, The Guardian ... Providers (the dental subsidiary of UnitedHealth Group). , ,These ... to enhance a platform that allows dentists to submit ...
... with innovation and excitement on its closing day, focusing ... next-generation systems designed to protect and defend the national ... email services. In addition to an array of new ... next "big thing" in a morning panel devoted to ...
Cached Biology Technology:Covance Appoints Co-Presidents for Early Development Services 2DEMO 2003 Closes with Focus on Collaboration and Communication 2DEMO 2003 Closes with Focus on Collaboration and Communication 3DEMO 2003 Closes with Focus on Collaboration and Communication 4