Planting time for forest trees branches out to new seasons
...rrow when it comes to planting pine trees: nursery seedlings go in the ground between Dec. 1 and March 1. Perio...tiny trees into the soil, research is showing that seedlings grown in containers until the moment of planting, then planted with the potting medium intact around...Colorado U. to fly hardware, experiments on space shuttle, space station
...003, the group plans to fly crops of loblolly pine seedlings which BioServe already has flown on space shuttles -- on the space station, he said....UC researchers confirm coast redwood and Douglas fir as hosts for sudden oak death pathogen
...d seedlings. After six weeks, the pathogen-exposed seedlings exhibited lesions from infection, unlike their une...sed counterparts. Branches on many of the infected seedlings became yellowed and discolored, while branches on the control seedlings retained their green color. ...Doubt cast on theory of tropical forest diversity
...rk report on studies of the fate of tree seeds and seedlings in research forests in the Appalachian Mountains. ... studies showing how the initial fate of seeds and seedlings impacts the long-term dynamics of forests. Clark and his colleagues are now pursuing such studies, h...Planning could preserve urban forests for future enjoyment
... Thirty sample plots were counted for saplings and seedlings in each forest, of which five were burned in Seton Falls Park, 15 were burned in both Turtle Pond and Mishow Marsh watersheds and none were burned in A.B. Williams Woods. Loeb found that sassafras increased density in burned areas and that white ash...High CO2 levels hamper nitrate incorporation by plants
...ly high. In laboratory experiments they grew wheat seedlings with either nitrate or ammonium under varying concentrations of atmospheric carbon dioxide. They discovered that elevated levels of carbon dioxide inhibited the processing of nitrate in the wheat leaves in two ways. First, plants place a higher prior...Fragmentation can make seedlings wimpy
...iversity and wereless likely to germinate, and the seedlings that did grow had smallerleaves. This is the first study of how forest fragmentation affectsseedling quality. "Fragmentation of tropical dry forests reduces genetic variation andseedling vigor of the tree Samanea saman," says Mauricio Quesada of theU...Illuminating how plants adapt to light
...ns. In their experiments, they exposed germinating seedlings of all of the plants to the same levels of blue, r... to those wavelengths. The scientists also exposed seedlings to two plant hormones known to affect light-sensitive pathways. By measuring the length of the embry...Picky plants: Do they 'choose' the best fungal partner?
... of different types of fungi growing on balsam fir seedlings in an area with light conditions ranging from full sun to full shade. He found that a fir seedling living in the shade associates with a different fungus than a fir seedling living in the sun, and that it teams up with the fungus that "costs" the le...... thaliana. The gene, called squint because mutant seedlings pointy, elongated leaves resemble squinting eyes, is believed present in all flowering plants, including such valuable crops as corn, tomatoes and soybeans. Capitalizing on the natural morphological and biochemical differences that characterize these...Scientists see early indications of lobster decline
...ing that they correspond to some reduced number of seedlings and eventually the plants you harvest," says Steneck. "Predicting lobster abundances or landings is no easier than predicting the economy or the weather. While local lobster landings may generally reflect local lobster abundance, measuring abundance...Yale study pinpoints how plants adjust to and grow in various lighting conditions
...ed-like model for plant research, Deng's team grew seedlings under lights with varying intensities and waveleng...ts, the team found. Multiple photoreceptors in the seedlings perceive light signals and send this information to two protein components-COP1 and HY5, which then ...Diversity of trees in forests may be caused by soil pathogens, IU biologists find
... beneath a parent tree may kill most of the tree's seedlings in that particular area. This would clear the way ...rica. Preliminary studies showed that black cherry seedlings experience high mortality in soil collected beneath black cherry adults, but low mortality in soil c...Purdue researcher finds space fertile arena for gene transfers
...s in a control group here on earth. Of the soybean seedlings from the first space experiment, 9 percent exhibited the trait introduced. On earth, less than 1 percent of the control group showed the trait. "The rate of transient expression in a space environment was more than tenfold over the success rate of a ...El Niño triggers tropical forest reproduction
...leftover to germinate and produce a carpet of new seedlings on the forest floor. In the Science article, ...t during the 1998 El Nino year, no new dipterocarp seedlings were found in the survey area. "Even though the park is supposedly off-limits to logging, the ...Evergreens help block pesticide from crop fields
... call on NRCS specialists to plant windbreak seedlings and maintain them for two years. At that cost, the typical 2000-foot stretch of windbreak runs about $400 -- which the agency says is comparable to what farmers would ...Sea level rise behind coastal tree deaths
...er plots. They tagged and counted allthe trees and seedlings and monitored groundwater salinity and tidal flooding.Over the next three years, they returned to the sites periodically to notechanges to the tree populations and correlate them with measurements of tidalflooding and changes in groundwater salinity....USGS studies wildfire ecology in the western United States
...e hot spots reduce competition so that the sequoia seedlings have chance," Stephenson says. Sequoia seeds require contact with bare soil in order to germinate, and this is possible only when fire has cleared away the layers of leaf litter and debris. The loss of fire in sequoia groves has greatly affected...Natural repellant in Spanish cedar leaves could help tropical forests
... at the University of Greenwich, saythat selecting seedlings with high concentrations of these previouslyunidentified substances, known as limonoids, may help in the production ofplantation-raised Spanish cedars while also reducing the need for syntheticinsecticides. Spanish cedars are hardwood members of the......e're trying to do is to treat these two batches of seedlings thesame, except that one will be exposed to one G ...ch day until launch we'd have to prepare abatch of seedlings ready to place on the shuttle," Safadi-Chamberlain said. The results of the experiment shou...