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For those of you who do your own crosses...

Posted: Fri Jan 08, 2016 7:02 am
by raybark
A study completed last year showed that when exposed Kelpak (sold here as KelpMax), pollen grain germination was enhanced by 60%, and the pollen tubes grew to 4x the length of untreated controls.

Makes me wonder if some of the recalcitrant cultivars we occasionally see might be coaxed into better seed production, or if this might be a way to help overcome size inconsistencies when attempting crosses of drastically different sizes - pollen from small plant put on one with a very large/long ovary.

Re: For those of you who do your own crosses...

Posted: Fri Jan 08, 2016 9:47 am
by TxRobNLA
That's interesting. Definitely might be worth trying. I wonder if the pollen plant should be sprayed during the period when buds are developing or if just treating the pollinia would work.

-R

Re: For those of you who do your own crosses...

Posted: Fri Jan 08, 2016 11:59 am
by peterlin
Treating the pollinia? Are you thinking submerged in kelpmax? At what strength?

For those of you who do your own crosses...

Posted: Fri Jan 08, 2016 12:40 pm
by raybark
In their pollen-tube experiment, they dipped the grains in various solutions - 1:100, 1:250, and 1:500 - and all showed better tube growth than untreated controls.

Frankly, I don't know if that's worth trying, of if its better to just spray both of the plants a few days before pollination. If the latter, I would guess anywhere from 3-4 days to a week in advance, allowing the plant time to reach its metabolic peak.