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Untersuchungen zur Assimilatverteilung in Ackerbohnen ( Vicia faba L.) während der Blühphase
Author(s) -
Haisch A.,
Pommer G.,
Forster S.
Publication year - 1988
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1988.tb00298.x
Subject(s) - vicia faba , ripening , biology , apical dominance , botany , vicia , horticulture , shoot
Investigations about the distribution of assimilates during flowering in broad beans ( Vicia faba L.) The distribution of assimilates during flowering was studied on single plants exposed to 14 CO 2 in the field. The plants were harvested 1, 3, 15 days after exposition and at ripening. Results: 1. At the begin of flowering the nodes with flowers assimilated much 14 C with a tendency of higher contents in the more above situated nodes. The concentration of 14 C was similar in blades, stalks and flowers. 2. The assimilates incorporated after 24 hours were only to a small amount translocated afterwards. Only 3 % went to the apical region. An intensive restorement out of the blades took place at the time of ripening. 3. In the midst of flowering the concentration of 14 C was lower in the nodes with open flowers than in those with shut or with pods. At that time pods are already strong sinks that withdraw assimilates from blades and stalks. 4. At the time when large and small pods are growing on the lower and middle nodes, the nodes in the apical region will be deprived of assimilates (effects of dominance). 5. Roots and nodules had low but stable contents and concentrations of 14 C during flowering. These descended distinctly at ripening.