This review concentrates on recent information on the identity of the niÂ trogenous compounds which are transported in the long-distance channels of higher plants, on the manner in which these compounds become available for transport in xylem and phloem, and on the relationships between the physiological activities of various organs of the plant and the ever-changing spectrum of transport exchanges of nitrogen which accompany plant growth and development. A special effort is made to relate this information to the overall functioning of the plant, using a recently developed modeling 0066-4294/80/0601-0313$01.00 PATE technique to illustrate how the flow profiles for carbon and nitrogen in xylem and phloem of a plant relate to the total economy of these elements in the whole plant and its constituent parts. An apology is required for the somewhat heavy emphasis on the transport processes of leguminous plants. However, by concentrating on familiar species, the author attempts to achieve an element of continuity and authenticity which would not have been possible were he to deal with less familiar groups of plants. With its special emphasis on transport at organ and whole plant levels, the review gives little space to transport at the cellular level, despite
Annual Review of Plant Biology – Annual Reviews
Published: Jun 1, 1980
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