A rare fossil plant reveals how early plants moved water and food, helping to explain the secrets of tree growth.

Journal of Experimental Botany, Vol. 40, No. 219 (October 1989), pp. 1069-1078 (10 pages) The minute changes in volume of a grape berry which occur from hour to hour were measured non-destructively in ...

This is a preview. Log in through your library . Abstract The secondary phloem of pecan is segmented by narrow rays into radial sectors of varying width. Irregular bands of fibers alternate with ...