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THE INFLUENCE OF LIGHT ON THE GERMINATION OF SENECIO VULGARIS L.
Author(s) -
HILTON JANET R.
Publication year - 1983
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.1469-8137.1983.tb02717.x
Subject(s) - phytochrome , germination , red light , white light , achene , far red , botany , senecio , biology , horticulture , chemistry , physics , optics
S ummary Achenes of Senecio vulgaris L. show a strong positive requirement for white or red light to attain maximal germination at 20 °C. The response to light is mediated by the photoreversible photoreceptor phytochrome. The light requirement can also be satisfied by short daily irradiations with red light (660 nm) and far‐red light given at the end of daily red light photoperiods depresses germination to Cedeximately 60%. It is suggested that P fr , the active form of photochrome, once formed, persists for between 8 and 10 h. The interactions between light, KNO 3 and constant temperatures between 0 and 30 °C have also been studied.