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Expression of Circaseptan and Circannual Rhythmicity in the Imbibition of Dry Stored Bean Seeds
Author(s) -
Eric Spruyt,
JeanPierre Verbelen,
J. A. De Greef
Publication year - 1987
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.84.3.707
Subject(s) - imbibition , phaseolus , noon , zoology , diurnal cycle , atmosphere (unit) , mean value , biology , horticulture , botany , germination , atmospheric sciences , meteorology , geology , mathematics , geography , statistics
Water uptake of seeds of Phaseolus vulgaris L. cv Limburg was monitored in a controlled atmosphere every day at solar noon for a period of 2 years. The imbibition rate, determined as the mean of five replicas, was related to the lunar cycle, maximal water uptake occurring between the new phases of the cycle. The monthly mean value of imbibition rate, calculated from the daily measurements, displayed a circannual rhythm reaching maximal values in August-September and minimal values in February-March. These monthly values were positively correlated with the mean of the maximal temperatures recorded daily outside.

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