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TRANSLOCATION INTO MATURE LEAVES‐THE PATHWAY OF ASSIMILATE MOVEMENT
Author(s) -
THROWER STELLA L.,
THROWER L. B.
Publication year - 1980
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1980.tb03185.x
Subject(s) - phloem , sieve tube element , xylem , biology , botany , petiole (insect anatomy) , chromosomal translocation , vigna , parenchyma , gene , biochemistry , hymenoptera
SUMMARY Possible routes of assimilate movement from younger into mature leaves of Vigna sesquipedalis have been investigated. The presence of label is not the result of redistribution of root amino acids. No evidence could be found for movement in the xylem. The lack of direct phloem connections between successive leaves suggests that the only possible route is via parenchyma cells between adjacent sieve tube strands of the node, and subsequent movement in the phloem of the petiole and leaf. The implications for normal upward movement in the plant are discussed.