hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

Unauthorized use of a plant doesn't invalidate it's patent

RSS story archive

Re: Rain

hmm, that is interesting!   We have an outside chance of rain Monday.  Sure
hope we get some, it's like a dust bowl here.

On 10/3/08, james singer <islandjim1@comcast.net> wrote:
> Rain off and on all day today. Big mushroom came up in the front yard.
> I had hopes it was a meadow mushroom, so I went out and picked it. It
> wasn't, sad to say--but the time of year is right for them, so I'll
> have to keep looking.
> Rain's supposed to continue all through tomorrow before tapering off,
> then start up again Monday. I don't know what all this moisture will
> mean to the vegetable patch, but it will be great for most everything
> else.
> OSU posted this item earlier this week. I found it interesting.
> CORVALLIS, Ore.   More than 125 years ago Charles Darwin first
> reported that most plants grow in a spurt during the night, not the
> day   and this week, scientists are reporting the discovery of the
> genes that control this phenomenon.
> These rhythmic growth spurts, and the ability of plants to move in
> response to light, are actually controlled by genes involved in
> circadian rhythms   the  biological clock  genes that are influenced
> by light and dark, vary their activity based on time of day, and are
> increasingly found in both plants and animals to control a wide
> variety of functions, ranging from growth to nervous system function
> and even fertility.
>   This is an incremental but important step in understanding how
> plants grow,  said Todd Mockler, an assistant professor of botany at
> Oregon State University, and co-author of the report with colleagues
> at the University of California at San Diego and the Salk Institute
> for Biological Studies.
> Ultimately, more understanding of these growth genetics could allow
> scientists to create plants that grow faster, produce more food or
> have other useful characteristics, the researchers said.
> The findings will be reported this week in PloS Biology, a
> professional journal. The research was funded by the National Science
> Foundation, National Institutes of Health and the Howard Hughes
> Medical Institute.
>   We now know that the expression of certain genes and hormones at
> night and just before dawn is important for plant growth,  Mockler
> said.  During the day, the plant focuses on other tasks, such as the
> photosynthesis that produces its energy. And plants are not only
> responding to time of day, but also the length of daylight to control
> such things as flowering time and stem length.
> When such mechanisms are more fully analyzed, it may be possible to
> influence them with genetic modification, Mockler said.
> This advance was made possible largely by the use of DNA microarrays
> and bioinformatics, most of which was done at OSU. This technology
> allows powerful computers to be combined with more conventional
> biological research to examine thousands of genes in an organism, in a
> very short period of time, and determine which ones are active and
> what their role is.
> Researchers now believe that almost all plant genes are expressed
> only at a particular time of day, depending on the growth condition.
> And they use growth and movement to maximize their chance of survival
> in a competitive environment   a plant leaf, for instance, will
> literally move if it becomes shaded by another plant.
> In 1880, in one of his lesser-known works that was not focused on
> animal evolution, Darwin first described this phenomenon. He found
> that rather than growing at a steady rate, plants often grow in
> regular nightly spurts.
> The findings in this study were made with the plant Arabidopsis, a
> small plant in the mustard family that is often used as a model for
> genetic research. A glowing enzyme, luciferase, was attached to the
> genes that were identified as responsible for rhythmic growth. And it
> would glow, on and off, as the genes began functioning to create the
> hormones responsible for growth in the dark of night.
> The research program also learned that most of the genes involved in
> this process have a common DNA sequence, which they called the  HUD
> element for  hormone up at dawn.
> Further studies are needed to identify a protein that attaches to this
> HUD element and regulates its function. Identifying that regulator,
> the scientists said, could open the door to ways to control plant
> growth and yield.
> Island Jim
> Willamette Valley
> 44.99 N 123.04 W
> Elevation 148'
> 39.9" Precipitation
> Hardiness Zone 8/9
> Heat Zone 5
> Sunset Zone 6
> Minimum 0 F [-15 C]
> Maximum 102 F [39 C]
> ---------------------------------------------------------------------
> To sign-off this list, send email to majordomo@hort.net with the

Pam Evans
Kemp TX
zone 8A

To sign-off this list, send email to majordomo@hort.net with the

  • References:
    • Rain
      • From: james singer <islandjim1@comcast.net>

Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index

 © 1995-2015 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement