EDITORIAL A green light for plants

Green light for gene targeting in plants.

P recision engineering of eukaryotic organisms requires efficient techniques for homology-based replacement of an endogenous gene by an introduced gene, a process termed gene targeting (GT). Because foreign DNA is preferentially integrated by nonhomologous recombination in plants and animals, special strategies are needed to increase the frequency and facilitate the detection of GT. Developing ...

Light Production by Green Plants

1. Green plants have been found to emit light of approximately the same color as their fluorescent light for several minutes following illumination. This light is about 10(-3) the intensity of the fluorescent light, about one-tenth second after illumination below saturation or 10(-6) of the intensity of the absorbed light. 2. The decay curve follows bimolecular kinetics at 6.5 degrees C. and re...

Editorial: Melatonin in Plants

Effects of Oxygen and Red Light upon the Absorption of Visible Light in Green Plants.

D. C. Effect of 2,4-dichlorophenoxyacetic acid on respiration and on destruction of indoleacetic acid in oat and sunflower tissues. Science 120: 710-712. 1954. 9. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-dichlorophenoxyacetic acid on the respiration of etiolated pea seedlings. Plant Physiol. 31 Suppl.: xxii. 1956. 10. HUMPHREYS, T. E. and DUGGER, W. M., JR. The effect of 2,4-di...

A green light for new research.

water on culture medium, let it incubate, and see if any bacterial colonies develop. But that technique demands lots of waiting, and you might prefer a quicker technique-say, one that allows you to watch the bacteria grow in real time. Laura Leff of the department of biological sciences at Kent State University in Ohio does just that-watches bacteria grow right before her eyes-by labeling them ...