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Dormancy break in seeds of Impatiens glandulifera Royle
Author(s) -
MUMFORD PAULINE M.
Publication year - 1990
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1990.tb00935.x
Subject(s) - dormancy , abscisic acid , biology , impatiens , embryo , anthocyanin , botany , seed dormancy , gibberellic acid , germination , horticulture , microbiology and biotechnology , cultivar , biochemistry , gene
summary When dormancy is broken by chilling in Impatiens glandulifera Royle anthocyanin appears in the cells of the root cap acting as a marker of the physiological condition of the seeds. This precedes growth of the embryo as indicated by increase in seed weight. Abscisic acid at some concentrations can inhibit dormancy break and anthocyanin synthesis in the root cap. All tissues of the embryo, when excised, responded independently to the cold stimulus. Grafting pieces of dormant and non‐dormant seed showed the agent effective in breaking dormancy was not transmissible between a piece of chilled embryo placed in contact with a piece of dormant embryo.