Fwd: Pollen Storage for Bulbs

Millie Burrell amburrell@ag.tamu.edu
Wed, 10 Aug 2005 19:47:49 PDT
This is for the people who have wanted to know what had been said previously on this topic.  I realize that many people have had success freezing pollen but this is my experience.  Take it for what it's worth.  I work in a laboratory where we use expensive items like Drierite dessicant, Epi tubes for storage and Magenta boxes.  Hybridization doesn't have to be an expensive hobby or profession.  Another suggestion I have is to buy a Sharpie that is ethanol resistant.  When you clean your pollinating brush (as soft as possible, like a lipstick brush or a natural hair artist brush), you might accidently drip alcohol on your pollen container.  The typical Sharpie's ink just washes away.  Labels are important if you make lots of crosses.

Good luck.  My successes have been with refridgerated pollen but life's just a big experiment, right?

Thanks, Millie



Millie Burrell
Department of Biology
Plant Genetics Laboratory
Texas A&M University
Norman Borlaug Center  Rm 115
MS 2123
College Station, TX  77843-2123
millieb@tamu.edu 




>>> Millie Burrell 08/09/05 12:02 AM >>>
I noticed on the Lycoris, Crinum thread that there was a request for info on storing pollen.

1. For bulbs, DO NOT FREEZE the pollen.  With peaches and roses (the majority of my plant breeding experience), we always froze our pollen and it stayed viable for 2 or 3 years.  Sadly, with Zephyranthes, I learned a hard lesson about freezing pollen.  It kills it.  I did a control experiment in the fridge and it was happy.  The literature also advises not to freeze.  Of course, I read that AFTER putting my Z. katherinae (red)  pollen in the freezer.  The control experiment was with the ubiquitous H. robustus...

2.  Put your pollen into a labeled tube and refrigerate fairly soon after collection.  In some crops, you leave the anthers out to dry, so they will dehisce their pollen.  Members of the Amaryllidaceae, Liliaceae and Iridaceae (in my experience) prefer to dehisce their pollen in the fridge.  Leaving it out in a draftless room for 24 to 48 hours as you do with pollen of other crops renders the pollen less viable.  Or so I have experienced.

Storage:  Get an airtight container like Gladware and put a dessicant in the bottom of it.  A thin layer is fine.  Kitty litter is fine for a dessicant.

Then get individual plastic tubes (available at craft stores) usually 1.5 ml volume or .5 ml volume.  Just make sure you can close the lid on them.  Into these, you will insert your anthers.  It's best to pinch them off with tweezers and insert into the labeled tube.  Labels are essential if you want to make numerous crosses.  Clean your tweezers with alcohol when moving on to collect pollen from another species.  Wipe off the ethanol and harvest more anthers.

Place your pollen tubes in the container with the dessicant and it should remain viable for a year or two.

I hope this is informative and helpful.  This has been my most successful way to store pollen over the long haul.

Sincerely,

Millie Burrell



Millie Burrell
Graduate Student
Department of Biology
Texas A&M University
Norman Borlaug Center
MS 2123
College Station, TX  77843-2123
(979) 845-2683
millieb@tamu.edu 





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