Clean water and indigenous knowledge

SciDev.net reports that prickly pear cactus (Opuntia spp) can be used in a simple process to remove 98% of bacteria from dirty water. 1 That would be good news for poor people who may be surrounded by prickly pears, but lack clean water. Alas, (some) poor people don’t want pure water.

“Stomach and intestinal infections are considered a way of cleansing the body, and are not conceived as diseases.”

Oh the dilemma. Preserve their indigenous knowledge, or offer them better health? 2

Strangely, among other communities, on another continent, indigenous knowledge of the water purifying properties of Moringa seeds is just plain confused. Some people know all about it, others believe that more than three Moringa trees are “a source of misfortune that brings poverty and death”. But not from water-borne diseases, perhaps.

Bob is healthy

Via Lois Englberger comes news of Bob Festival Day in the Marshall Islands last Saturday, 24 April. Bob is not some guy, but rather the Pandanus tree. Lois shared Lydia Tibon’s description of the event, which we reproduce below. Pandanus is very important throughout the Pacific, where it has multiple uses. Lois is particularly interested in its beta carotene content. Our thanks to both her and Lydia.

KIJLE (Kora in Jiban Lolorjake Ejmour), meaning “women assisting to promote good health,” participated. We wanted to remind everyone that Bob is better than eating processed foods.

As you can see, the table, chairs, everything hanging and inside our float were pandanus-made. Our kids, grannies were chewing and throwing bobs to everyone. Our billboard message was to promote both education and health.

Our motto is Bob Dikdik Kejadikdrik, the translation is something like “Bob is so fruitful.” It produces so much, it gives us so much knowledge that we use the leaves by weaving the mats, making hats, use to drink medicines, also gives Vitamin A that is very rich to protect our skin, vision, bones and many more….

Our T/shirt that day was “Bob is healthy.”

The birthplace of the Dashehari mango

Our dear friend and colleague Bhuwon Sthapit has prepared this post for us with input from Dr H. Ravishankar, Dr BMC Reddy, Dr S Rajan and farming communities. Thanks, everyone!

‘Dashehari’ is one of the most popular mango varieties of North India, widely acclaimed for its exquisite taste and pleasant aroma. It is also my favorite. Naturally, I was excited to visit the Dashehari Village in Malihabad where the 200 years-old mother tree of the variety, a cultural heritage of the community, still lives.

It is believed that the trees on 80% of the area covered by mango in northern India can be genetically traced back to this very tree. The heritage is exciting, but the risks resulting from massive uniformity of orchards and lack of home gardens to harbour other interesting types of mangoes are terrifying.

Legend has it that a Pathan of Khalispur village of Malihabad Tehsil, transporting choicest mangoes for trade, happened to halt for rest in a hut of a poor Momedian, a monk. The Momedian helped travelers by offering water and shelter and the travelers reciprocated with ripe mangoes.

At the time of departure, the Pathan and the monk had an argument. In a fit of rage, the Pathan shoved one of his choicest ripe mangoes into the soil instead of gifting it to the monk, who however maintained the utmost calm and restraint. In the ensuing rainy season, a mango sapling emerged from the spot, which was duly nurtured to a robust tree by the Momedian. After about twelve years, the tree profusely flowered and yielded fruits of excellent quality.

The news of this unique mango reached the Nawab who owned the land. Being aware of the importance of genetic wealth, he took due care to protect and conserve this exquisite mango variety, which later became the popular ‘Dashehari’ variety of North India.

The tree is still very healthy and impressive, about 10m tall, having a mean canopy spread of 21.0 m and a trunk circumference of about 3.0 m (see picture 1).

The tree has a robust trunk with twelve main scaffolding branches originating and radiating at 1.5 m height almost parallel to the ground.

The tree has spreading canopy architecture with impressive fruiting at the time of the visit, completely overshadowing neighboring trees.

A scientist from the Central Institute of Sub-tropical Horticulture in Lucknow told me that fruits of this Dashehari tree are oblong, elliptical and medium size (13cm long and 8 cm breadth) weighing 130 to 260 g.

It has attractive yellow pulp, firm and non-fibrous, with very sweet taste (researchers told me that it has oBrix score of 21-23 as measure of sweetness in fruits) and pleasant aroma. CISH collected scion material of the tree for clonal propagation in 1977 and thereafter elite clones spread to northern Indian farmers from a network of private and government nurseries.

This cultural heritage tree belonged to the great-grandfather (Mr Ishtida Hussain) of farmer Mr Shamir Zaidi, now 30 years old, who has named his house in honour of the variety — Dashehari Kothi. Mr Kamil Khan, an 87 years old but rather progressive orchardist of the small hamlet of Kakori (close to Dusseheri village) of Malihabad Tehsil shared local legends with the visitors. He told us that the tree, under natural care, is free from stemborer and termites attacks, both common problems of mangoes. It is also free from Loranthus infestation. This tree has yielded on an average 80-190 kg in the last eight years, with a moderate biennial bearing habit.

In September 2009 the area was registered with Geographical Indication No 125 in the name of “Mango Malihabad Dusseheri” by India’s Geographical Indication Registry. The communities around the mother tree have also been selected for the UNEP/GEF Project “Conservation and sustainable use of wild and cultivated fruit tree diversity: Prompting sustainable livelihoods, food security and ecosystems services” in Malihabad, Lucknow. Communties such as Sarsanda, Kasmandi Kalam and Mohammad Nagar Talukedari have 7-29 cultivated varieties each.

They are also blessed by rich diversity in seedling mango trees, with an estimated population of 3000 to 5000 mango seedling trees. Almost all current commercial mango varieties in India are selected from the seedling population. Potentially research can identify many more consumer- and farmer- preferred diversity of mangoes and innovative farmers can work together with researchers and nurserymen to identify, select and popularize the elite materials from existing farmer’s orchards. The project aims to empower farming communities and local institutions to identify unique varieties from the orchards and scale up genetic resources and associated traditional knowledge for sharing wider benefits to farmers and consumers.

Almost all orchards in Malihabad are dominated by Dashehari (80%), with over 10-20 varieties of other cultivated types, but few trees of each. Around the orchards farmer maintain many seedling types and all of these trees produce diverse fruits with diverse shape, size, color and taste. There is thus scope to increase diversity in the market by sharing information with consumers in urban areas to stimulate demand for other varieties there, and thus minimize the risks posed by uniformity while also providing livelihood security for mango growers.

Nibbles: Microlivestock, Urban ag, Ag info, School meals in Peru, Agrobiodiversity indicators, Nature special supplement, Extension, Breeding organic, Forgetting fish in China, Deforestation, Russian potatoes, Fijian traditional knowledge, Megaprogrammes

Early farmers got high on chickpeas?

ResearchBlogging.orgA somewhat cryptic comment a few days ago on a year-old post on domestication eventually led us to an intriguing 2007 article in The Times which we unaccountably seem to have missed the first time around. The article quotes liberally from a Journal of Archaeological Science paper which puts forward something of an unorthodox take on chickpea domestication. 3

The authors, from various Israeli institutions, start by saying that chickpea is an unusual member of the “founder package” of Middle Eastern crops, which also includes diploid einkorn wheat, tetraploid emmer wheat, barley, pea, lentil and bitter vetch. That’s because its wild precursor (Cicer reticulatum), unlike those of the other first crops, has a relatively narrow distribution and an indehiscent pod (that is, the pods don’t split open when the seeds are ripe), and the crop itself is grown in the summer rather than the winter, basically to escape the fungal disease Ascochyta blight. A rare precursor and a problematic agronomy: why bother with the damn thing? There must have been something special — or at least different — driving the domestication of chickpea. That something, according to the authors, is the amino acid tryptophan.

Free tryptophan levels are an average of three times higher in seeds of cultivated chickpeas compared to their wild precursor, but with a lot of variation among cultivars. The usual sorts of processing have no effect. The levels are such that the authors are able to suggest that “consuming domesticated chickpea will elevate the levels of tryptophan available for processes other than growth and maintenance.” What processes might these be?

Tryptophan is a precursor of the neurotransmitter serotonin in the brain. More tryptophan in the diet means more tryptophan in the blood which means more serotonin in the brain, which has a whole suite of interesting effects. Apart from a feeling of satiety, these include higher ovulation rates in women, improved performance under stress, lowering of aggression and greater receptivity.

So the authors are suggesting that early farming communities consuming wild chickpeas would have been more fertile, less hungry, less depressed, more accepting of social complexity, more innovative and more self-confident. Sounds like I should be eating more chickpeas. Anyway, recognizing the effect that eating these wonder grains had on their mood — and farm animals are apparently able to recognize high tryptophan feeds — early farmers would have selected for ever higher levels, leading to the domestication of the species: “it seems that the inclusion of chickpea in the founder crop package is best understood in light of its high nutritional seed properties.”

Well, it’s a great story, and I really hope it turns out to be true, although I’m not entirely sure how one might further test the hypothesis. Shades of the tale of the domestication of coffee. But I think it might be worth revisiting that initial assumption. Is chickpea really all that different from the other members of the founder package? The distribution of its precursor is certainly limited compared to some of the cereals (the map is courtesy of GBIF).

But wild lentils are not exactly common, and much more inconspicuous. And anyway we don’t really know what the distribution of C. reticulatum was like in the Neolithic. Its pollen doesn’t turn up in cores, according to one expert I asked, so it’s going to be difficult to reconstruct its ancient distribution and frequency. And why should seed indehiscence make chickpea a poor candidate for domestication? Wouldn’t it have been just the opposite? What about tryptophan levels in the other early legumes? And finally, as suggested by a former legume breeder I consulted, was Ascochyta blight a problem in the Neolithic? And is C. reticulatum susceptible to it anyway?

It does seem that perhaps the authors may have erected a bit of a straw man, which they then attacked with a very ingenious, utterly plausible, but ultimately unnecessary argument. But that’s not going to stop me eating my pasta e ceci a bit more often than before I read this paper.