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A MORPHOGENETIC STUDY OF LANCEOLATE, A LEAF‐SHAPE MUTANT IN THE TOMATO
Author(s) -
Mathan D. S.,
Jenkins J. A.
Publication year - 1962
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.1537-2197.1962.tb14972.x
Subject(s) - biology , cotyledon , hypocotyl , gibberellic acid , botany , lycopersicon , mutant , inflorescence , explant culture , gibberellin , meristem , tendril , shoot , germination , gene , genetics , in vitro
M athan , D. S., and J. A. J enkins . (U. California, Berkeley.) A morphogenetic study of lanceolate, a leaf‐shape mutant in the tomato . Amer. Jour. Bot. 49(5): 504–514. Illus. 1962.—The single‐gene mutant, lanceolate ( La/La + ), which has simple, entire leaves rather than the oddpinnately compound leaves of the normal tomato (Lycopersicon esculentum ), differs from normal ( La + / La + ) in many characters which can be related to fewer and larger cells in meristematic regions. The homozygous lanceolate (La/La) is sometimes lethal, but is usually expressed as reduced , which consists of a hypocotyl without cotyledons, or occasionally either by modified , in which there is a single fused cotyledon and a bud, or by narrow , in which the bud produces a shoot with simple leaves even smaller than those of lanceolate and a tendril‐like inflorescence without flowers. In an attempt to overcome the effect produced by the lanceolate gene, the mutant was treated with a number of substances. Embryos without cotyledons cultured in White's medium plus adenine or tyrosine or both gave a higher frequency of narrow plants. With added gibberellic acid, no narrow plants developed from embryos without cotyledons. When tyrosine was sprayed on young narrow plants, they developed larger leaves and morphologically normal but sterile flowers. On the other hand, gibberellic acid sprayed on young lanceolate plants altered their development in the direction of narrow.