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July 18, 2016 
Recommended Retrofitting of  ArabiSun SUN-12 & SUN-24 fixtures with LED Bulbs

For some time, LEHLE SEEDS has been evaluating LED lighting sources to replace the hot 27 watt 6500K compact fluorescent "spring" lamps (CFL) traditionally used in the fixtures of our SUN-12 and SUN-24 mobile light carts.  I report here that an equal mix of the new Phillips 60 watt equivalent "Soft White" A19 (socket) LED light bulbs with the new Phillips 60 watt equivalent "Daylight" A19 (socket) LED light bulbs produces more and better quality PAR (photosynthetic active radiation) without the excessive heat, expense, and environmental hazard associated with the older CFL spring lamps.  For each existing 12 socket (A19 type) SUN-12 or SUN-24 fixture, LEHLE SEEDS now recommends replacing all 12 CFL bulbs with a "checkerboard" pattern of 6 Phillips 60W equivalent LED "SOFT WHITE" (2700K)  bulbs and 6 Phillips 60W equivalent LED "DAYLIGHT" (5000K) as shown below.   This combination, while appearing white to the eye, supplies strong peaks in both the red (2700K) and blue (5000K) regions of the spectrum which supports excellent Arabidopsis growth with remarkably little heat generation.

Fred Lehle PhD

May 23, 2016
Cat. no. WT-02 Columbia Seed Contamination Update

On January 4, 2016 LEHLE SEEDS halted its WT-02 Columbia seed sales temporarily to regenerate its Columbia wild type seed stock due the confirmed presence of a small percentage of Arabidopsis plants whose rosette leaf phenotype was dissimilar to Columbia. An investigation of previous lots in our Columbia production pedigree has now been completed and the results are published in the March 2016 issue of the The Plant Cell in the following Letter to the Editor, 

Mon-Ray Shao, Vikas Shedge, Hardik Kundariya, Fredric R. Lehle, and Sally A. Mackenzie. Ws-2 Introgression in a Proportion of Arabidopsis thaliana Col-0 Stock Seed Produces Specific Phenotypes and Highlights the Importance of Routine Genetic Verification. Plant Cell 2016 28: 603-605.

To detect and and prevent any future introgressions between different Arabidopsis ecotypes from contaminating our Columbia planting seeds in the future, LEHLE SEEDS will grow, without exception, Columbia separately in time and space from the other Arabidopsis ecotypes we produce.

In addition, LEHLE SEEDS is currently implementing a new phenotype verification step in the production of our Columbia planting seeds. The purpose of this seed verification step is to confirm that all planting seeds are derived only from parents whose phenotype has been individually verified as conforming to the Columbia ecotype. More details will be provided when they are available.

Customers with questions can direct them to sales@arabidopsis.com, or telephone 1-512-388-3945 or fax us at 1-512-388-3974.

Fred Lehle, Ph.D.

March 30, 2009
ArabiPot Update - New Organizer Insert, New Subirrigation Tray, New Cat. No. PTA-126

We have recently substantially reconfigured  the ArabiPot  cat. no. PTA-10.  We removed the deep open subirrigation tray and replaced it with two new components: 1) a new low -profile subirrigation tray of the same footprint and 2) a intermediate flat insert that organizes the 18 ArabiPots into a convenient array.  The new subirrigation tray prevents accidental overwatering by setting an upper limit on the amount of each irrigation.  The new insert keeps the ArabiPots neatly organized in an 3 x 6 array, something that was needed in the original configuration.   The insert has a perforated bottom, so irrigation added to any portion of the insert is immediately distributed equally in the lower tray.  If the growth space is available, the 3 x 6 array can be expanded with multiple trays (6 total) into the common 9 x 12 array. We designate this new configuration cat. no. PTA-126, which will consist of 126 ArabiPots, 7 organizer flat inserts and 7 subirrigation trays.  With the introduction of these new components, cat. no. PTA-10 will be retired. 

Order Cat. no. PTA-126
 ArabiPots, Organizer Flats & Subirrigation Trays for Arabidopsis

Quantity (box) Price/box*
1 $108.00
*Box includes 126 pots, 7 Organizer Inserts & 7 low-porfile subirrigation trays

To place an order

Call 1-800-881-3945
 (Toll-free in USA)

Fax 1-512-388-3974

 

 

 
LEHLE SEEDS
1102 South Industrial Blvd. Suite D Round Rock, Texas 78681 USA
Tel: 1-(800) 881-3945 (USA only),  1-(512) 388-3945 (elsewhere),  Fax: 1-(512) 388-3974
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