Originally posted by scottishinnz
Distribution of current photosynthate in two Guinea grass (Panicum maximum Jacq.) cultivars
You were that guy!
Better not try this one;
Carvalho DD, Irving LJ, Carnevalli RA, Hodgson J & Matthew C (2006)
Journal of Exp Bot
57, 9, pp2015-2024
probably the most numerically dense paper I ever wrote. Was a complete swine!
In a glasshouse experiment, different tiller categories (main, young primary, and old primary) of two Guinea grass cultivars, Mombaça and Tanzânia, were 14C-labelled to investigate C translocation between tillers. In both cultivars, young primary tillers retained less radiocarbon (79
than main (86
and old primary (87
labelled tillers, suggesting that the photosynthetic capacity of the young tillers exceeds their capacity either to store or use that photosynthate for growth and maintenance. In cv. Tanzânia the old primary tillers translocated more photoassimilate to their daughter tillers and to the rest of the plant than cv. Mombaça, suggesting either higher vascular connectivity between tillers or stronger diurnal fluctuations in sink–source balance in Tanzânia than Mombaça. For unlabelled tillers, specific activities were almost always higher in roots than in shoots, although total radiocarbon uptake by roots was reduced in younger tillers with low root mass. Where young primary tillers were labelled, the largest single repository of exported photoassimilate was the main tiller roots, indicating that daughter tillers may make an important contribution to the maintenance of older roots on mature tillers.
Well the abstract looks intimidating, but I think sometime when I'm feeling masochistic I'll give it a try.
EDIT: I like the smiley faces that were automatically put in, very appropriate. I've got the PDF by the way if anyone else feels like reading this beast of a paper and doesn't have access to a subscription to the Journal of Experimental Botany.