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J. Dannenhoffer ; A. Schulz ; M. Skaggs ; D. Bostwick ; G. Thompson | 1997The conducting elements of phloem in angiosperms are a complex of two cell types, sieve elements and companion cells, that form a single developmental and functional unit. During ontogeny of the sieve element/companion cell complex, specific pro[...]article/chapitre/communication
A. Schulz | 1994Phloem transport was investigated in pea seedlings after application of [C-14]sucrose to the cotyledons. The accumulation of the label in segments of young seedlings shows a differential unloading along the plant axis. Shoot and root exhibit tip[...]article/chapitre/communication
G. Orlich ; M. Hofbruckl ; A. Schulz | 1998External sucrose, supplied by the endosperm in vivo, is the physiological source of sucrose for Ricinus communis L. seedlings. It is taken up by the cotyledons and exported via the sieve tubes to the growing hypocotyl and root. Two parallel path[...]article/chapitre/communication
