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CONTRIBUTION A L‘ÉTUDE DU RÔLE DE LA LUMIÈRE DANS LA SEXUALISATION DU GAMÉTOPHYTE DE MARCHANTIA POLYMORPHA L.
Author(s) -
Courtoy R.
Publication year - 1966
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1966.tb05962.x
Subject(s) - botany , primordium , biology , chemistry , biochemistry , gene
Abstract— Gemmae of Marchantia polymorpha L. were grown in artificial light (16 hr, 4000 lx), aseptic conditions, at the Phytotron of Liège. It was shown that: (1) Two distinct phases are obvious in growth and development of the gemmae: (a) A juvenile phase with a minimum length of 15 days in any kind of light quality, on a mineral nutrient medium. (b) An inductive phase , during which the inception of primordia occurs in incandescent light. (2) When 1% sucrose is added to the mineral nutrient medium, the length of the juvenile phase is reduced to 5 days; however, sucrose has no action when it is provided in the dark. It is assumed that the inductive incandescent light may promote a high energy reaction which is required for sexual induction.