Premium
THE PHOTOINDUCTIVE CONTROL OF SEED WEIGHT IN CHENOPODIUM RUBRUM L.
Author(s) -
Cook Robert Edward
Publication year - 1975
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1975.tb14067.x
Subject(s) - photoperiodism , biology , primordium , botany , chenopodium , day length , horticulture , zoology , biochemistry , weed , gene
The determination of mean seed weight in Chenopodium rubrum L., a short‐day, weedy annual, has been examined through the manipulation of photoperiod during the course of reproductive development. Individuals that develop seeds in relatively long photoperiods (15 L: 9 D) form many more seeds of smaller weight than individuals that develop seeds in relatively shorter photoperiods (12 L: 12 D). By altering the inductive photoperiod at different times during the course of reproductive development, it is shown that the effect of photoperiod is most strongly exerted between six and twelve days after the start of floral induction and is coincident with the determination of primordia as floral structures. The ecological significance of this early developmental determination is discussed.