Have you considered the graft ? doctor !

Definition in horticulture : graft = ?
1.
a - a bud, shoot, or scion of a plant inserted in a groove, slit, or the like in a stem or stock of another plant in which it continues to grow.

b - the plant resulting from such an operation; the united stock and scion.

c - the place where the scion is inserted.

2.
Surgery. a portion of living tissue surgically transplanted from one part of an individual to another, or from one individual to another, for its adhesion and growth.
3.
an act of grafting.

The purpose of the "game" is to combine these two plants : Ipomoea batatas and Ipomoea Nil.
They must be from the same plant family, Both are Convolvulaceae - kind of proximity.

In recent years the individual has the opportunity to purchase grafted annual plants for the garden .
Now we find tomatoes, cucumbers, peppers, melons and eggplant grafted ready to transplant . This increases the force, so the production and resistance disease.
Google translates.
http://www.ja-saitama.jp/magazine/040_01.html

Human play with the nature.

Maybe a hybrid eggplant and Union Jack. LOL

It can be seen since 2004 (only!) on MG shows, grafted plants are admired by visitors for their style "bonsai".

In botany there are several types of grafts, but here, among the sweet potatoes and I. Nil if the graft is on the stem or directly on the potato it 's a stem graft because potato is actually considered as a stem.

With pictures of "Bruno" ( somewhere in Japan ) I can illustrate the graft on the sweet potato.

For this example it is a whole young plant - a very young whole plant - INCREDIBLE ! , cotyledons are still on plant.
"V" cutting.

A second plant is sacrificed.

Packaging.

And here are two grafted plants ready for a long life.

Is sprayed from time to time with either green tea or with water.
The control of the water seems to be important (rotting or infections).

49 days later.

And one day early morning !

More closely.

The pink flowered a little later and have already started the burst flowering .

Autumn arrives.

The question is: if I plant these seeds I get grafted plant or sweet potatoes?

Answer next year ! LOL

Wouldn't you get vegetative growth from both stock and scion, plus the I. batatas tuber? Or does the scion inhibit growth of stock vines?

Joseph

My guess ... since the I. nil is an annual, it would not come back next year. It appears to me that the Ipomoea batatas is basically a growing medium for the I. nil. Do the genes cross? I kinda doubt it. But it is fascinating that the I. nil adapts to the potatoe as a host plant. I wouldn't have ever thought of even trying that!

I guess as you said, we'll know more next year.

Gene mixing involves sex and grafting is a vegetative process.

Well, maybe if they sent the potatoes into space? :) Karen

After grafting, the potato still has the desire to grow, so we must control the release and cut them . (As Roses with Rosa Canina).

On this image they let everything grow - the graft Ip. Nil and the mother plant Ip. Batatas .

Graft on tomatoe.
http://www.hort.uconn.edu/ipm/greenhs/htms/Tomgraft.htm
Another technique is to transplant sweet potato in a pot of soil, or 2 inches of water. The plant will quickly develop foliage.
The graft will be done on the stems, see this drawing:

Cutting branch of sweet potato.

Cutting of Ip. Nil.

Maintains with a traditional method.

Or use tongs of grafting.

Here the point of grafting well healed.

Two types of grafts on a single sweet potato.
First Cleft Grafting and the back side Tongue approach Grafting .

Tongue approach Grafting - well stabilized.

A whole sweet potato feet in the water.
The stem of Ip. Nil also in water quenching.
To protect fragile grafted plant it 's always good to hang it on a fence.

PS: graft with Ipomoea Tricolor don't work!

Can you use any size and cultivar sweet potato, Dany?

I suppose that ornamental cultivars of sweet potato are also valid (Margarita, Blackie etc ...)
http://davesgarden.com/guides/pf/showimage/64413/
All Nil cultivars are good to use.I have no information for Purpurea.
Another question, can we use other MG with caudex?

Wouldn't it be cool to graft Black King onto the caudex of Ipomoea albivenia?

The big potatoes in your photographs look like the kind you would buy in a grocery store. Do the roots of the ornamental Ipomoea batatas get that huge?

The outer space idea was a joke. I might try that grafting idea just for fun this summer if time permits. It looks like a way to get more seeds and blooms from a vine too and the combination of foliage and blooms is pretty.

Do you know a reason they do this in Japan besides that it looks neat? I`m curious.

Karen

I'm wondering, if I did this like in the first tutorial by inserting the seedling into the sweet potato, and then in the fall, lifted and cut back and stored for the winter would the I. nil stems from the previous summer resprout the next year since they are now part of the sweet potato?

In principle, for me it would be possible. But there is a natural cycle plant has complied with - for me, leaves are making reserves in the potato then dry season arrives, the foliage disappears the plant is at rest and start again with the next rainy season.
Or should keep the plant green all year.

http://www.mykz.affrc.go.jp/Old/Gyoumu/page2.htm
I found this site in Japan - Google Translates is nice but with the Japanese language it is not the best!
Me this is what I understand:
To produce new varieties of sweet potato (rare flowers, incompatibility) we must be passed by the stage of graft (ATTENTION ! Sweet potato on Ipomoea Nil)
This would make the flowers fertile.

Do you understand this too?
Now we know how to produce quantity of seeds with Ipomoea Indica!

I'm finding the translation a bit confusing, but I understand what you said about the leaves storing energy till the next year. That makes sense to me and if I get a chance I would love to try this out! If it works then I. nil vines could be wintered over from year to year!

I have a tuber of the variegated type of ornamental Sweet Potato. The tuber is only the size of a slender carrot but maybe in a year or 3 if I can keep it alive it can be used for grafting purposes.

Dany - Do you think that will really help promote seed production in morning glories? I must be missing something in the concept and translation of grafting that increases seed production on such species at I. indica and the rare MGs that are stingy seed makers. :-/

I think it's just to make a MG which has the "bonsai" look . I do not think they produce more flowers or seeds.
An amateur reports that his grafted plant grow to the second floor.