Monday, 26 April 2010

A Precocious Talet

Here's a shot of my first crop of talets for 2010. This very small and exceedingly early harvest results from the concatenation of events beginning late last year. Frank van Keirsbilck, purveyor of all things seedy and exciting, sent me the underground beans from one of his Amphicarpaea bracteata varieties in November. As I was otherwise detained in hospital, I was unable to rescue the seeds from a warm room and they promptly germinated. By the time I had recovered sufficiently to care about such things, the majority of them had exhausted themselves in their padded envelope prison and rotted. A few however, seemed to be alive, so I potted them up and put them on the windowsill with the maukas I mentioned previously. This was in late January, or maybe early February. They started to make the typical vine-like growth, but then rapidly switched to reproductive mode: the stems stopped elongating and flowers began to appear.

Now the leaves have yellowed and are dropping off, revealing a small crop of blackish pods. Presumably the short daylength was enough to arrest their usual vegetative development and initiate flowering and seed formation. Put it another way - I inadvertently tricked them into flowering at the wrong time of year. If nothing else, it's a fairly graphic illustration of how profound the effects of daylength can be on plant development.

It's also made me think about the kind of characteristics I'd like to see in a domesticated talet plant. For our climate we want a plant that makes rapid growth during the early stages of the growing season and then switches over to intensive reproduction in late summer, laying down large quantities of fat seeds for the winter. Realistically, this will need to begin before the equinox, as temperatures and light levels have often fallen too low for acceptable growth after this time and the spectre of an early killing frost frequently stalks the land.

It is apparently the case that yabumame (Amphicarpaea edgeworthii), talet's Asian cousin, shows variation in time of flowering according to latitude; northern latitude plants begin flowering more quickly after sowing and continue for longer than their soft southern counterparts. It's a fair bet that the same is true in the case of Amphicarpaea bracteata. So the hunt is on for northern provenance seeds. This can mean only one thing - Canada.

One particular place in Canada with a climate at least vaguely reminiscent of ours would be a good place to start: Prince Edward Island. Like Anne of Green Gables, whose resolute optimism saw her through the trials of life, I'm positive that another citizen of Canada's 'Garden of the Gulf ' will be able to supply me with some seeds and maybe throw in a tuber or two of Apios americana for good measure. Step forward please.

Other than that, I'd like to see an Amphicarpaea plant that doesn't aspire to be the kudzu of my vegetable patch. All the plants I've grown send out rangy, tentacular shoots and sparse leaves with long flower stalks in their axils. A similar sort of growth habit is common to many other wild beans and is, no doubt, highly adaptive. While hunting for the scattered beans may be OK for wild food afficionados armed with digging sticks, rush baskets and plenty of time, it does rather hamper the gardener's attempts to harvest meal-worthy quantities. It also contributes to the impression that the plant is more trouble than it's worth and should be evicted at the first opportunity. Exit stage left, pursued by a hog.

Leaf spacing is a function of internode length: shorten the distance between leaves and you get leafier, bushier plants with a more manageable habit of growth. Perhaps these plants would, as a result, focus more effort on producing the bit we want, the beans, rather than those serpentine shoots with the insatiable wanderlust. The result? More beans per square metre. As short internodes are produced by recessive genes in other legumes, I suspect the same is true for Amphicarpaea. I have a nagging suspicion that I could be waiting a while for a homozygous bushy plant to appear. Nevertheless, like Anne of Green Gables, or more particularly, Mr Micawber, I'm confident that eventually something will turn up.

4 comments:

Mark said...

I could send you about 10 seeds now, if you want them. I got sent 21 seeds from Gardens North in Canada. It does not seem that I'll be getting any living plants from Massachusetts(must enquire what has happened to my order from Tripple Brook farms) so no rhizobitoxine-producing rhizobia for my seeds. Ergo, no point in planting seeds until I have symbiotic bacteria for them to happy with. Send me your address and postcode, I'll pop them in the post tomorrow, if you want.
Back to the nightmarerishly evil manuscript corrections from the Evil Advisor.

Rhizowen said...

Hi Mark

It could be that the Tripple Brook plants have yet to appear and they only ship when they're actively growing. Thanks for the offer of the seeds - I'd like to take you up on that offer. Good luck with those corrections.

Rhizowen said...

Sorry Mark - have I got your email? Is it the your name. nmsu.edu one?

Mark said...

The email is the rmark@nmsu.edu
No problem. I will send them ASAP to whatever address you want them sent to.
Mark

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