Cannabis : evolution and ethnobotany by Robert C. Clarke, Mark D. Merlin PDF
By Robert C. Clarke, Mark D. Merlin
"'Cannabis: evolution and ethnobotany' is a complete, interdisciplinary exploration of the typical origins and early evolution of this recognized plant, highlighting its old position within the improvement of human societies. hashish has lengthy been prized for the robust and sturdy fiber in its stalks, its fit to be eaten and oil-rich seeds, and the psychoactive and medicinal compounds produced via its woman vegetation. The culturally worthy and infrequently irreplaceable items derived from hashish deeply inspired the industrial, scientific, ritual, and spiritual practices of cultures during the a long time, and human wish for those commodities directed the evolution of the plant towards its modern kinds. As curiosity in hashish grows and public debate over its many makes use of rises, this publication might help us comprehend why humanity keeps to depend upon this plant and adapts it to fit our needs."--Ebook's beginning display (EBL platform, seen October nine, 2013). Read more...
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Extra info for Cannabis : evolution and ethnobotany
This middle Eurasian cauldron of human evolutionary and cultural change lay within the natural range of Cannabis, and Pleistocene early humans would have been attracted to its readily apparent attributes. Our assertion that Central Asia was both the original Pleistocene home and center for evolution and dispersal of Cannabis within the past 50,000 years is supported by our reconstruction of the climatic conditions across Eurasia during past geological periods. In order to further explore the human-Cannabis relationship, it is also important to determine in which regions early people may have lived nearby Cannabis populations.
In hot, dry climates, Cannabis’s high transpiration rate makes it very susceptible to wilting. However, the pubescence of glandular trichomes concentrated around the inflorescences, especially of female flowers, helps protect vital reproductive tissues from drying out, slowing water loss by producing a lower surface temperature and slowing transpiration. Cannabis needs relatively small amounts of water to merely survive, except during germination and establishment. It flourishes on well-drained soils where ample supplies of water are available; on the other hand, stressful arid conditions or waterlogged soil can cause severe stunting and death.
The survey of reproductive strategies presented earlier indicates that Cannabis, an herbaceous, sun-loving, short-day flowering annual, most likely evolved somewhere in temperate latitudes of the northern hemisphere, and data from published research favors Eurasia, especially Central Asia, as its region of origin. Future DNA research and additional forms of molecular genetic investigation may help to more accurately determine the original home of Cannabis. In the meantime, a review of evidence for the origin and prehistoric dispersal of Cannabis offered by the disciplines of paleoclimatology, archeology, and taxonomy supports our model for the evolution of Cannabis.