David Thoms News Today : Breaking News, Live Updates & Top Stories | Vimarsana

 E-Mail IMAGE: Mechanisms of symbiotic engagement -- three principles by which plants may select for or restrict potential mutualists or pathogens. view more  Credit: David Thoms, Yan Liang, and Cara H. Haney Plants are constantly exposed to microbes: pathogens that cause disease, commensals that cause no harm or benefit, and mutualists that promote plant growth or help fend off pathogens. For example, most land plants can form positive relationships with arbuscular mycorrhizal fungi to improve nutrient uptake. How plants fight off pathogens without also killing beneficial microbes...

hoping someone will step forward with new information to help police. >> reporter: there is a peace sign that has been made with rocks out in front of the home where 20-year-old christopher cummings was shot and killed over the weekend. on monday his uncle congressman elijah cummings talked about this devastating loss. >> my nephew was just truly was an amazing young man. if you ever met him, you would say i'd love to have him for a son. >> reporter: the congressman told us his nephew would have succeeded in anything he attempted to do in life. he enjoyed attending old dominion unive...

from where they live now? >> yes. mr. clark was brought over here from montgomery county earlier today. >> reporter: motive, i know a lot of people out there familiar with this case, they are wondering what could have motivated this crime. mr. deaner was considered well liked in the community and didn't have any enemies. we learned from police when we covered the date of the original crime, and what do we know about this? >> we don't believe the suspects knew the victim at this time. >> thank you for joining us. we'll continue to work this story and bring you more tonight at 6:00 and...

for joining us tonight for nissan sports xtra. i'm lindsay murphy. coming up i go one on one with the terps new hoops coach mark turgeon plus the thunder rolls in the nba playoffs but first let's hit the diamond. 2010 is a year nats pitcher jason marquis would like to forget. not only did he miss most of the season following elbow season, but he also won just two of his 13 starts. this year he's back not only with his pitching but his hitting as well. marquis was looking to improve to 5-1 with a victory today. he would get run support early on, already up 1-0 on the marlins in the 1s...