Wednesday, 11 August 2010

Whence the Indian Lotus?

I just received a query about the native range of the  Indian Sacred Lotus (Nelumbo nucifera), and whether it might have been introduced to India (e.g. by Indo-Europeans). Here are my thoughts

An introduction to India is not out of the question, but seems fairly unlikely. True there are no hard archaeobotanical finds of Nelumbo [formerly often Nelumbium] but this species is surprisingly rare archaeologically in any case. In favour of an ancient presence in South Asia is the linguistic evidence in Dravidian in which there are cognates in the South, South-Central and Central Dravidian subfamilies (see Dravidian Etymological Dictionary Revised entry 3163), which suggests an original term at a level as early as indigenous South Indian domesticates (Mungbean, horsegram) and many indigenous trees (teak, neem, etc.) [see Fuller 2007 pdf]. The absence of North Dravidian cognates is likely to be poor linguistics recording. These Dravidian, all something like #tamar, are presumably the source of Sanskrit tamarasa (unless one were to posit a shared, older substrate source for both). The true wild distribution is somewhat problematic because today this species is found largely in human-made or modified pools (tanks, etc), but this is to be expected as there are few natural ponds in much of India, where there have been quite dense agricultural populations for a few thousand years. Nelumbo is native in Iran and Southwest Russia, but also extends to East and Southeast Asia, New Guinea and bits of Australia, so a natural presence in India, at least through the Indo-Gangetic river systems seems likely. Archaeobotanically the only really early evidence for lotus that springs to mind is from China, where charred tuber fragments are found at the Neolithic site of Jiahu (7000-6000 BC), where is constitutes part of a aquatic resource package along side Trapa water chestnuts, rice (probably morphologically wild) (as well as wild resources like acorns). There is a brief summary and graph of the Jiahu data published recent in English by 'Jimmy' Zhao in Archaeological & Anthropological Sciences 2.

I would also note that the fossil record is not very informative about where something is native (in the sense of wild prior to human involvement). Of course Nelumbo is present in Tertiary and late Cretaceous India, as it is a very early ('primitive') dictotyledon group, near the base of the lineages that  are nowadays called the Eudicots (characterized by tricolpate pollen, as well as genetic monophyly). Nelumbo is in its own family and places in the Proteales (see Angiosperm Phylogeny website).  Nelumbanaceae type fossils go back to the Albian, ca. 110 million years, and their presence in Tertiary India is not surprising, as at that time the India subcontinent was an island (formerly of Godwanaland) that was rafting north and had not yet crashed into Asia. Tertiary India included lost of flora which did no persist into the Quaternary: Gunnera is one example that springs immediately to my mind! [see Fuller & Hickey Gunnera paper] Instead, a later Pleistocene and early Holocene fossil record is what is needed to determine where something in 'native'.


P Priyadarshi said...

Regarding perennial mention of Aryan arrival/ invasion into India in this blog, I will only quote what learned genticists have ti say. Sahoo, Kivisild, Metspalu, Villems and their colleagues ruled out any Aryan migration to India (Sahoo et al, 2006, p. 845). They showed by detailed study that India is logically the ultimate source of M17 (R1a) and its ancestors. They noted: “The perennial concept of people, language, and agriculture arriving to India together through the northwest corridor does not hold up to close scrutiny. Recent claims for a linkage of haplogroups J2, L, R1a, and R2 with a contemporaneous origin for the majority of the Indian castes’ paternal lineages from outside the subcontinent are rejected, although our findings do support a local origin of haplogroups F* and H.” (p. 847) [Sahoo, Sanghmitra et al, A prehistory of Indian Y chromosomes: Evaluating demic diffusion scenarios, PNAS 2006 Jan., 103(4): 843-848]


P Priyadarshi said...

Earlier than Kivisild, Stephen Oppenheimer (2004) too had expresses his views in no uncertain terms: “And sure enough we find highest rates and greatest diversity of the M17 line in Pakistan, north India, and eastern Iran, and low rates in the Caucasus. M17 is not only more diverse in South Asia than in Central Asia but diversity characterizes its presence in isolated tribal groups in the south, thus undermining any theory of M17 as a marker of a 'male Aryan Invasion of India.' Study of the geographical distribution and the diversity of genetic branches and stems again suggests that Ruslan, along with his son M17, arose early in South Asia, somewhere near India.”

But if someone is determined not to read others' writings, what can be done?