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The effect of cold treatment during seed imbibition on lettuce radicle length and the uniformity of seedling emergence
Author(s) -
FELLOWS JANE R.,
WURR D. C. E.
Publication year - 1986
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1986.tb03201.x
Subject(s) - imbibition , radicle , seedling , biology , germination , horticulture , botany , agronomy
SUMMARY Two experiments were conducted to determine how a period of exposure to 0 o C, between two periods of imbibition at 20 o C, affected radicle development and the uniformity of seedling emergence. In both experiments cold treatments, given 12 h after seed imbibition began, produced shorter radicles than those given at 0, 4, 8, 16 and 20 h. Increasing the duration of exposure to 0 o C gave longer radicles and reduced the spread of seedling emergence. It is concluded that lettuce seeds are particularly sensitive to a temperature change about 12 h after seed imbibition starts.