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STRUCTURE OF THE SHOOT APEX IN LACTUCA SATIVA
Author(s) -
Constantin M. J.,
Mullenax R. H.
Publication year - 1966
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.1537-2197.1966.tb07364.x
Subject(s) - lactuca , biology , apex (geometry) , germination , botany , shoot , embryo , microbiology and biotechnology
Histological observations of the leaf lettuce ‘Black Seeded Simpson’ showed the dormant embryo to possess two visible leaves and a flkat to slightly depressed plumular apex. Observations conducted over a 12‐day period of germination and growth showed the development of L 1 and L 2 , emergence of L 3 and L 4 , and periodic changes in size of the apex which were associated with leaf emergence. Thus the dormant embryo of Lactuca appears to be considerably more advanced in development than was previously believed. The shoot apex appeared flat to slightly depressed at all developmental stages studied.