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Ontario, Canada.

The link below is really technical but it does suggest a link between chilling of roots, suberisation and decreased uptake of calcium. This could be the key to our fruit splitting problems. Caution, It is long winded and full jargon.

http://www.blackwell-synergy.com/links/doi/10.1046/j.1365-313X.2002.01306.x/full/

11/21/2004 11:00:47 AM

Ontario, Canada.

"The suberisation of endodermal cells, and the restriction that this places on Ca2+ influx to the root symplast, impacts on the movement of Ca2+ across the root to the xylem"

11/21/2004 11:12:47 AM

Oz

suberisation?????
do you suberize?....

11/21/2004 1:12:27 PM

Rhode Island

w o w

11/21/2004 5:06:46 PM

New Hampshire

Evidence suggests that depolarisation-activated Ca2+ channels mediate Ca2+ influx to plant cells upon cooling. First, both Ca2+ influx and [Ca2+]cyt transients in roots are prevented by pharmaceuticals that block the depolarisation-activated maxi cation channel in the plasma membrane of root cells

Transgenic Arabidopsis thaliana line J3611, expressing apoaequorin fused to a modified yellow fluorescent protein (YFP) solely in endodermal cells

This is what I have been saying all along.

11/21/2004 5:37:22 PM

Indiana

Oh I see the roots suck it up. hehe

11/21/2004 7:05:02 PM

[email protected]

Russ, Notice that the degree of cooling wasn't much of an issue but rather the rate of decline was the culprit. The rate sited was .01 C/s or 6 degrees C every 10 minutes. This might be significant for tissue culture propagation where rapidly changing root media temperatures are an inherent risk to the minute volume of media. But the day our soils change temperature that fast in the field we'll have much bigger concerns than our pumpkins.

It does stimulate thought though doesn't it? Perhaps there is a corelation to Cucurbita Maxima that these researchers wouldn't know of since they were working with the popular lab plant Arabidopsis thaliana or Mouse-ear Cress.

If chilling soils shut down root absorption of soil Calcium, then this might explain some of the split issues this summer. It would also make a stronger than ever argument for using foliar applied chelated calcium.

11/21/2004 8:57:23 PM

Heres's a good read, rearding the subject

http://www.nporganics.com/pdf/gardenscience.pdf

11/21/2004 9:03:26 PM

"HOW PLANTS ACQUIRE NUTRIENTS FOR GROWTH"

http://www.google.com/search?hl=en&lr=&q=related:www.bfa.com.au/Downloads/Factsheets/can_do_howplantsaquirenutrients_PITTAWAY.doc

11/21/2004 9:12:48 PM

[email protected]

http://jxb.oupjournals.org/cgi/content/full/52/358/891/F2

Veiw the C. pepo chart & text. Then click the article button.

11/22/2004 7:45:19 AM

Lloydminster/AB

Here is another good one http://www.plantphys.net/index.php

11/22/2004 7:25:38 PM

Thornhill, Ontario, Canada

So, is chicken manure good for pumpkins because they produce calcium already to make egg shells? What do you thik of this product?...http://www.acti-sol.ca/en/

11/23/2004 4:34:51 PM

Ontario, Canada.

Crammed, I ckecked out that product. Although it seams to be a good product I bet it is fairly exspensive. You may be able to get some chicken manure from a local farmer, far cheaper than the bagged stuff. You need lots of material per patch so the bags are not very economical.

11/25/2004 10:46:26 AM

Montoursville, PA

Any fowl poop is good used in moderation. I use about ten four gallon buckets of it a year. Half in the fall on the garden and the ballance into the compost. This per 1000 sq. ft. of patch. This along with some corn meal is most likely a very good approach, to building healthy resistant plants, to fungi related problems. This has been good for my soils just about forever. My kin folks and their kinfolks had chickens and market chickens with occasional ducks and turkeys along the way.

12/1/2004 9:54:56 AM