iris-photos@yahoogroups.com
- Subject: Re: Re: HYB: seed pots [and more]
- From: C* C* <i*@aim.com>
- Date: Sun, 05 Dec 2010 00:46:41 -0500
I have done this complete process only once. But same result in all the 150 pods, except for about 5.
I would be very surprised if it didn't work consistently. I have taken a couple of books on seed germination and dormnancy out of University library and have been looking up reserach on line. It is quite clear that iris seeds fall into category of seeds having two factors needed to break dormancy. Leeching and chilling. Very many seeds require warm temperatures to initiate germination once these treatments have broken dormancy. Obviously not so with bearded iris. Seems to be necessary for beardless iris though. Arils seem to have need for third treatment, seed scarification. that is damge to seed coat to enable water uptake. There are 7 listed means of breaking seed dormancy. None of the others seem to apply to iris seeds. Chuck Chapman From: J. Griffin Crump <jgcrump@cox.net> To: iris-photos@yahoogroups.com Sent: Sat, Dec 4, 2010 3:50 pm Subject: Re: [iris-photos] Re: HYB: seed pots [and more] Chuck -- Are you getting this high degree of germination consistently year-to-year?
Iâm also checking with a colleague in Region 3 who has been planting in a greenhouse for some years now, to see what her experience has been. -- Griff
From: i*@aim.com
Sent: Friday, December 03, 2010 11:58 PM
To: i*@yahoogroups.com
Subject: [iris-photos] Re: HYB: seed pots [and more]
This year I had about 96% seed germination.
Seeds placed into pantyhose legs, each pod with it's own marker, and tied offf Seeds in panty hose soaked in water and rinsed, once a day. Several rinses of water and pantyhose squeezed. earch day. Seeds then put with damp peat moss, into small plastic baggies. Peat moss soaked, and when used, squeezed out so just damp. Peat moss has something that helps seeds germinated. It has been tested experimentally several times. And when just damp, can hold air, which is essential for germination, as seeds need to breath.When wraped in damp paper seed can sometimes be deprived of air and suffocate. Then into fridge at about 4C or 38C. After about 2-3 months, seeds have germinated. Out of about 150 pods of bearded iris, only about 5 had less then about 90% germination. The beardless (siberian, pseudacorous, versicolor) had only about 10% germination, but about 100% within a week of being planted in soil. Chuck Chapman From: J. Griffin Crump <j*@cox.net> To: i*@yahoogroups.com Sent: Fri, Dec 3, 2010 2:18 pm Subject: Re: [iris-photos] Re: HYB: seed pots [and more] Forgetting all the seed burritos, tacos, enchildas, napkins, blankets, refrigerators, toilet tanks and what have you, and addressing only the matter of removing the germination-inhibiting coating from the seeds (the existence of which I accept as a reality), there is really a very simple way to do it. I empty the seeds from ripe (splitting or about to split) pods into individual little plastic containers (the kind that dairy products like cheese spread come in) and let them dry out for a couple of months. Mold may form on some of the seeds, but it doesnât do any apparent harm.) In October (if I get to it that early), I run about a quarter of an inch of water into each container and stack them atop one another, letting them sit for at least 5 to about 10 days. By that time, the coating has been reduced to an evil-smelling gunk in which the seeds are sitting. I then pour each containerâs contents into a wire mesh washing machine lint trap and hold it under the cold water tap in the kitchen full force. You can turn the contents this way and that under the faucet to ensure they get a good rinse. This only takes a few seconds, and it removes the evil gunk. I then shake the seeds back into their containers, which also have been rinsed free of the gunk, and stack them atop one another. The seeds will stay moist for a couple of days as I plant them into pots.
Now, this supposedly betters the odds that our seeds will germinate, but it by no means guarantees it. Other factors apparently are involved, and I donât think we know what all of them are.
If I went back through my yearly records, I might find patterns of more or less successful germination from pods involving one or another cultivar -- or I might not. I havenât had the time to do it. But, regardless of traits peculiar to certain cultivars, there is a pattern that I have observed over the years. That is, that no matter whether the winter has been mild or severe, wet or dry, the overall (all pots) rate of germination of seeds here fluctuates wildly. In an average year, I can expect better than 60%. In some years, better than 70%. But I have also had years in which the rate has dropped below 20%, and this past year (shudder) less than 5%. So, where does the pattern come in?
The pattern is that all of my fellow hybridizers in Region 4 with whom I talk report similar fluctuations in the same years. Iâve been tracking this for several years, ever since I first began to notice the coincidence. This leads me to suspect that there is something in the genetics of bearded irises --something cyclical, perhaps -- that is a controlling factor in germination which is as yet beyond our ken.
Iâd be interested to know what others think on this subject. -- Griff
From: l*@lock-net.com
Sent: Friday, December 03, 2010 8:59 AM
To: i*@yahoogroups.com
Subject: [iris-photos] Re: HYB: seed pots
That's what I was thinking. But I'm not sure exactly what I'm going to
do yet. Maybe daily dunk burritos for a week, slosh them around, then squeeze as much water out as I can, then back in fridge. That way, the ones that need a little more chilling will be sure to get it at optimal temperature (in the fridge), not as erratic as on the sunporch. Just pick out & pot up the germinating ones, same as in the past. But first, I have to get all the mess off the shelves on the sunporch - summer storage! > Will you be changing the water every day? > > <<I'll try to soak them in their baggies & plant afterwards>> > > > Betty W. Linda Mann east TN USA zone 7 |
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